dev..163dca8 · squeal · git.iko.soy

git.iko.soy/squeal

41 files changed+1561−3137

unifiedsplit

README.md+6−6

@@ -121,7 +121,7 @@ type Schemas = Public Schema

121121

122122Notice the use of type operators.

123123

124−`:::` is used to pair an alias `Symbol` with a `SchemumType`,

124+`:::` is used to pair an alias `GHC.TypeLits.Symbol` with a `SchemumType`,

125125a `TableConstraint` or a `ColumnType`. It is intended to connote Haskell's `::`

126126operator.

127127

@@ -180,8 +180,8 @@ DROP TABLE "emails";

180180DROP TABLE "users";

181181```

182182

183−We'll need a Haskell type for `User`s. We give the type `SOP.Generic` and

184−`SOP.HasDatatypeInfo` instances so that we can encode and decode `User`s.

183+We'll need a Haskell type for @User@s. We give the type `Generics.SOP.Generic` and

184+`Generics.SOP.HasDatatypeInfo` instances so that we can encode and decode @User@s.

185185

186186```Haskell

187187>>> data User = User { userName :: Text, userEmail :: Maybe Text } deriving (Show, GHC.Generic)

@@ -189,12 +189,12 @@ We'll need a Haskell type for `User`s. We give the type `SOP.Generic` and

189189>>> instance SOP.HasDatatypeInfo User

190190```

191191

192−Next, we'll write `Manipulation_`s to insert `User`s into our two tables.

192+Next, we'll write `Manipulation_`s to insert @User@s into our two tables.

193193A `Manipulation_` like `insertInto`, `update` or `deleteFrom`

194194has three type parameters, the schemas it refers to, input parameters

195195and an output row. When

196−we insert into the users table, we will need a parameter for the `name`

197−field but not for the `id` field. Since it's serial, we can use a default

196+we insert into the users table, we will need a parameter for the @name@

197+field but not for the @id@ field. Since it's serial, we can use a default

198198value. However, since the emails table refers to the users table, we will

199199need to retrieve the user id that the insert generates and insert it into

200200the emails table. We can do this in a single `Manipulation_` by using a

RELEASE NOTES.md+2−2

@@ -138,11 +138,11 @@ type Expr x

138138 . Expression outer commons grp schemas params from x

139139```

140140

141−There is also a function type `(-->)`, which is a subtype of the usual Haskell function

141+There is also a function type `(:-->)`, which is a subtype of the usual Haskell function

142142type `(->)`.

143143

144144```Haskell

145−type (-->) x y

145+type (:-->) x y

146146 = forall outer commons grp schemas params from

147147 . Expression outer commons grp schemas params from x

148148 -> Expression outer commons grp schemas params from y

squeal-postgresql/exe/Example.hs+3−6

@@ -38,7 +38,6 @@ type Schema =

3838 , "user_id" ::: 'NoDef :=> 'NotNull 'PGint4

3939 , "email" ::: 'NoDef :=> 'Null 'PGtext

4040 ])

41− , "positive" ::: 'Typedef 'PGfloat4

4241 ]

4342

4443type Schemas = Public Schema

@@ -53,16 +52,14 @@ setup =

5352 >>>

5453 createTable #emails

5554 ( serial `as` #id :*

56− hask @Int32 `as` #user_id :*

57− hask @(Maybe Text) `as` #email )

55+ (int & notNullable) `as` #user_id :*

56+ (text & nullable) `as` #email )

5857 ( primaryKey #id `as` #pk_emails :*

5958 foreignKey #user_id #users #id

6059 OnDeleteCascade OnUpdateCascade `as` #fk_user_id )

61− >>>

62− createDomain #positive real (#value .> 0 .&& (#value & isNotNull))

6360

6461teardown :: Definition Schemas (Public '[])

65−teardown = dropType #positive >>> dropTable #emails >>> dropTable #users

62+teardown = dropTable #emails >>> dropTable #users

6663

6764insertUser :: Manipulation_ Schemas (Text, VarArray (Vector (Maybe Int16))) (Only Int32)

6865insertUser = insertInto #users

squeal-postgresql/squeal-postgresql.cabal+9−33

@@ -25,13 +25,6 @@ library

2525 Squeal.PostgreSQL.Alias

2626 Squeal.PostgreSQL.Binary

2727 Squeal.PostgreSQL.Definition

28− Squeal.PostgreSQL.Definition.Function

29− Squeal.PostgreSQL.Definition.Index

30− Squeal.PostgreSQL.Definition.Table

31− Squeal.PostgreSQL.Definition.Table.Constraint

32− Squeal.PostgreSQL.Definition.Type

33− Squeal.PostgreSQL.Definition.Schema

34− Squeal.PostgreSQL.Definition.View

3528 Squeal.PostgreSQL.Expression

3629 Squeal.PostgreSQL.Expression.Aggregate

3730 Squeal.PostgreSQL.Expression.Collection

@@ -42,8 +35,7 @@ library

4235 Squeal.PostgreSQL.Expression.Math

4336 Squeal.PostgreSQL.Expression.Null

4437 Squeal.PostgreSQL.Expression.Parameter

45− Squeal.PostgreSQL.Expression.Range

46− Squeal.PostgreSQL.Expression.Set

38+ Squeal.PostgreSQL.Expression.SetOf

4739 Squeal.PostgreSQL.Expression.Sort

4840 Squeal.PostgreSQL.Expression.Subquery

4941 Squeal.PostgreSQL.Expression.Text

@@ -70,7 +62,6 @@ library

7062 , bytestring >= 0.10.8.2

7163 , bytestring-strict-builder >= 0.4.5

7264 , deepseq >= 1.4.3.0

73− , free-categories >= 0.1.0.0

7465 , generics-sop >= 0.3.2.0 && < 0.5.0.0

7566 , mmorph >= 1.1.1

7667 , mtl >= 2.2.2

@@ -88,50 +79,35 @@ library

8879 , uuid-types >= 1.0.3

8980 , vector >= 0.12.0.1

9081

91−test-suite doctest

82+test-suite squeal-postgresql-doctest

9283 default-language: Haskell2010

9384 type: exitcode-stdio-1.0

9485 hs-source-dirs: test

9586 ghc-options: -Wall

96− main-is: Doc.hs

87+ main-is: DocTest.hs

9788 build-depends:

9889 base >= 4.10.0.0

9990 , doctest >= 0.11.4

100− , squeal-postgresql

101−

102−test-suite properties

103− default-language: Haskell2010

104− type: exitcode-stdio-1.0

105− hs-source-dirs: test

106− ghc-options: -Wall

107− main-is: Property.hs

108− build-depends:

109− base >= 4.10.0.0

110− , bytestring >= 0.10.8.2

111− , hedgehog >= 1.0

112− , mtl >= 2.2.2

113− , scientific >= 0.3.5.3

114− , squeal-postgresql

115− , time >= 1.8.0.2

11691

117−test-suite spec

92+test-suite squeal-postgresql-specs

11893 default-language: Haskell2010

11994 type: exitcode-stdio-1.0

120− hs-source-dirs: test

95+ hs-source-dirs: test/Specs

12196 ghc-options: -Wall

122− main-is: Spec.hs

97+ main-is: Specs.hs

98+ other-modules: ExceptionHandling

12399 build-depends:

124100 base >= 4.10.0.0

125101 , async >= 2.2.2

126102 , bytestring >= 0.10.8.2

127103 , generics-sop >= 0.3.1.0

128104 , hspec >= 2.4.8

129− , mtl >= 2.2.2

130105 , squeal-postgresql

131106 , text >= 1.2.2.2

107+ , transformers >= 0.5.2.0

132108 , vector >= 0.12.0.1

133109

134−executable example

110+executable squeal-postgresql-example

135111 default-language: Haskell2010

136112 hs-source-dirs: exe

137113 ghc-options: -Wall

squeal-postgresql/src/Squeal/PostgreSQL.hs+1−9

@@ -195,13 +195,6 @@ module Squeal.PostgreSQL (module X, RenderSQL(..), printSQL) where

195195import Squeal.PostgreSQL.Alias as X

196196import Squeal.PostgreSQL.Binary as X

197197import Squeal.PostgreSQL.Definition as X

198−import Squeal.PostgreSQL.Definition.Function as X

199−import Squeal.PostgreSQL.Definition.Index as X

200−import Squeal.PostgreSQL.Definition.Schema as X

201−import Squeal.PostgreSQL.Definition.Table as X

202−import Squeal.PostgreSQL.Definition.Table.Constraint as X

203−import Squeal.PostgreSQL.Definition.Type as X

204−import Squeal.PostgreSQL.Definition.View as X

205198import Squeal.PostgreSQL.Expression as X

206199import Squeal.PostgreSQL.Expression.Aggregate as X

207200import Squeal.PostgreSQL.Expression.Collection as X

@@ -212,8 +205,7 @@ import Squeal.PostgreSQL.Expression.Logic as X

212205import Squeal.PostgreSQL.Expression.Math as X

213206import Squeal.PostgreSQL.Expression.Null as X

214207import Squeal.PostgreSQL.Expression.Parameter as X

215−import Squeal.PostgreSQL.Expression.Range as X

216−import Squeal.PostgreSQL.Expression.Set as X

208+import Squeal.PostgreSQL.Expression.SetOf as X

217209import Squeal.PostgreSQL.Expression.Sort as X

218210import Squeal.PostgreSQL.Expression.Subquery as X

219211import Squeal.PostgreSQL.Expression.Text as X

squeal-postgresql/src/Squeal/PostgreSQL/Binary.hs+40−130

@@ -216,9 +216,8 @@ module Squeal.PostgreSQL.Binary

216216 -- * Only

217217 , Only (..)

218218 -- * Oid

219− , OidOf (..)

220− , OidOfParam (..)

221− , OidOfField (..)

219+ , HasOid (..)

220+ , HasAliasedOid (..)

222221 ) where

223222

224223import BinaryParser

@@ -232,7 +231,6 @@ import Data.Time

232231import Data.UUID.Types

233232import Data.Vector (Vector)

234233import Data.Word

235−import Foreign.C.Types (CUInt(CUInt))

236234import Generics.SOP

237235import Generics.SOP.Record

238236import GHC.TypeLits

@@ -246,7 +244,6 @@ import qualified Data.Text.Lazy as Lazy (Text)

246244import qualified Data.Text as Strict (Text)

247245import qualified Data.Text as Strict.Text

248246import qualified Data.Vector as Vector

249−import qualified Database.PostgreSQL.LibPQ as LibPQ

250247import qualified GHC.Generics as GHC

251248import qualified PostgreSQL.Binary.Decoding as Decoding

252249import qualified PostgreSQL.Binary.Encoding as Encoding

@@ -312,24 +309,24 @@ instance Aeson.ToJSON x => ToParam (Json x) 'PGjson where

312309instance Aeson.ToJSON x => ToParam (Jsonb x) 'PGjsonb where

313310 toParam = K . Encoding.jsonb_bytes

314311 . Lazy.ByteString.toStrict . Aeson.encode . getJsonb

315−instance (ToNullityParam x ty, ty ~ nullity pg, OidOf pg)

312+instance (ToNullityParam x ty, ty ~ nullity pg, HasOid pg)

316313 => ToParam (VarArray [x]) ('PGvararray ty) where

317314 toParam = K

318315 . Encoding.array_foldable

319316 (getOid (oidOf @pg)) (unK . toNullityParam @x @ty)

320317 . getVarArray

321−instance (ToParam x pg, OidOf pg)

318+instance (ToParam x pg, HasOid pg)

322319 => ToParam (VarArray (Vector x)) ('PGvararray ('NotNull pg)) where

323320 toParam = K

324321 . Encoding.array_vector (getOid (oidOf @pg)) (unK . toParam @x @pg)

325322 . getVarArray

326−instance (ToParam x pg, OidOf pg)

323+instance (ToParam x pg, HasOid pg)

327324 => ToParam (VarArray (Vector (Maybe x))) ('PGvararray ('Null pg)) where

328325 toParam = K

329326 . Encoding.nullableArray_vector

330327 (getOid (oidOf @pg)) (unK . toParam @x @pg)

331328 . getVarArray

332−instance (ToFixArray x dims ty, ty ~ nullity pg, OidOf pg)

329+instance (ToFixArray x dims ty, ty ~ nullity pg, HasOid pg)

333330 => ToParam (FixArray x) ('PGfixarray dims ty) where

334331 toParam = K . Encoding.array (getOid (oidOf @pg))

335332 . unK . unK . toFixArray @x @dims @ty . getFixArray

@@ -356,7 +353,7 @@ instance

356353 ( SListI fields

357354 , IsRecord x xs

358355 , AllZip ToField xs fields

359− , All OidOfField fields

356+ , All HasAliasedOid fields

360357 ) => ToParam (Composite x) ('PGcomposite fields) where

361358 toParam =

362359 let

@@ -364,7 +361,7 @@ instance

364361 encoders = htrans (Proxy @ToField) toField

365362

366363 composite

367− :: All OidOfField row

364+ :: All HasAliasedOid row

368365 => NP (K (Maybe Encoding.Encoding)) row

369366 -> K Encoding.Encoding ('PGcomposite row)

370367 composite fields = K $

@@ -381,18 +378,18 @@ instance

381378 int32BE (fromIntegral (lengthSList (Proxy @xs))) <>

382379 let

383380 each

384− :: OidOfField field

381+ :: HasAliasedOid field

385382 => K (Maybe Encoding.Encoding) field

386383 -> Encoding.Encoding

387384 each (K field :: K (Maybe Encoding.Encoding) field) =

388− word32BE (getOid (oidOfField @field))

385+ word32BE (getOid (aliasedOid @field))

389386 <> case field of

390387 Nothing -> int64BE (-1)

391388 Just value ->

392389 int32BE (fromIntegral (builderLength value))

393390 <> value

394391 in

395− hcfoldMap (Proxy @OidOfField) each fields

392+ hcfoldMap (Proxy @HasAliasedOid) each fields

396393

397394 in

398395 composite . encoders . toRecord . getComposite

@@ -401,119 +398,35 @@ instance

401398--

402399-- >>> :set -XTypeApplications

403400-- >>> oidOf @'PGbool

404−-- Oid 16

405−class OidOf (ty :: PGType) where oidOf :: LibPQ.Oid

406−instance OidOf 'PGbool where oidOf = LibPQ.Oid 16

407−instance OidOf ('PGfixarray ns (null 'PGbool)) where oidOf = LibPQ.Oid 1000

408−instance OidOf ('PGvararray (null 'PGbool)) where oidOf = LibPQ.Oid 1000

409−instance OidOf 'PGint2 where oidOf = LibPQ.Oid 21

410−instance OidOf ('PGfixarray ns (null 'PGint2)) where oidOf = LibPQ.Oid 1005

411−instance OidOf ('PGvararray (null 'PGint2)) where oidOf = LibPQ.Oid 1005

412−instance OidOf 'PGint4 where oidOf = LibPQ.Oid 23

413−instance OidOf ('PGfixarray ns (null 'PGint4)) where oidOf = LibPQ.Oid 1007

414−instance OidOf ('PGvararray (null 'PGint4)) where oidOf = LibPQ.Oid 1007

415−instance OidOf 'PGint8 where oidOf = LibPQ.Oid 20

416−instance OidOf ('PGfixarray ns (null 'PGint8)) where oidOf = LibPQ.Oid 1016

417−instance OidOf ('PGvararray (null 'PGint8)) where oidOf = LibPQ.Oid 1016

418−instance OidOf 'PGnumeric where oidOf = LibPQ.Oid 1700

419−instance OidOf ('PGfixarray ns (null 'PGnumeric)) where oidOf = LibPQ.Oid 1231

420−instance OidOf ('PGvararray (null 'PGnumeric)) where oidOf = LibPQ.Oid 1231

421−instance OidOf 'PGfloat4 where oidOf = LibPQ.Oid 700

422−instance OidOf ('PGfixarray ns (null 'PGfloat4)) where oidOf = LibPQ.Oid 1021

423−instance OidOf ('PGvararray (null 'PGfloat4)) where oidOf = LibPQ.Oid 1021

424−instance OidOf 'PGfloat8 where oidOf = LibPQ.Oid 701

425−instance OidOf ('PGfixarray ns (null 'PGfloat8)) where oidOf = LibPQ.Oid 1022

426−instance OidOf ('PGvararray (null 'PGfloat8)) where oidOf = LibPQ.Oid 1022

427−instance OidOf 'PGmoney where oidOf = LibPQ.Oid 790

428−instance OidOf ('PGfixarray ns (null 'PGmoney)) where oidOf = LibPQ.Oid 791

429−instance OidOf ('PGvararray (null 'PGmoney)) where oidOf = LibPQ.Oid 791

430−instance OidOf ('PGchar n) where oidOf = LibPQ.Oid 18

431−instance OidOf ('PGfixarray ns (null ('PGchar n))) where oidOf = LibPQ.Oid 1002

432−instance OidOf ('PGvararray (null ('PGchar n))) where oidOf = LibPQ.Oid 1002

433−instance OidOf ('PGvarchar n) where oidOf = LibPQ.Oid 1043

434−instance OidOf ('PGfixarray ns (null ('PGvarchar n))) where oidOf = LibPQ.Oid 1015

435−instance OidOf ('PGvararray (null ('PGvarchar n))) where oidOf = LibPQ.Oid 1015

436−instance OidOf 'PGtext where oidOf = LibPQ.Oid 25

437−instance OidOf ('PGfixarray ns (null 'PGtext)) where oidOf = LibPQ.Oid 1009

438−instance OidOf ('PGvararray (null 'PGtext)) where oidOf = LibPQ.Oid 1009

439−instance OidOf 'PGbytea where oidOf = LibPQ.Oid 17

440−instance OidOf ('PGfixarray ns (null 'PGbytea)) where oidOf = LibPQ.Oid 1001

441−instance OidOf ('PGvararray (null 'PGbytea)) where oidOf = LibPQ.Oid 1001

442−instance OidOf 'PGtimestamp where oidOf = LibPQ.Oid 1114

443−instance OidOf ('PGfixarray ns (null 'PGtimestamp)) where oidOf = LibPQ.Oid 1115

444−instance OidOf ('PGvararray (null 'PGtimestamp)) where oidOf = LibPQ.Oid 1115

445−instance OidOf 'PGtimestamptz where oidOf = LibPQ.Oid 1184

446−instance OidOf ('PGfixarray ns (null 'PGtimestamptz)) where oidOf = LibPQ.Oid 1185

447−instance OidOf ('PGvararray (null 'PGtimestamptz)) where oidOf = LibPQ.Oid 1185

448−instance OidOf 'PGdate where oidOf = LibPQ.Oid 1082

449−instance OidOf ('PGfixarray ns (null 'PGdate)) where oidOf = LibPQ.Oid 1182

450−instance OidOf ('PGvararray (null 'PGdate)) where oidOf = LibPQ.Oid 1182

451−instance OidOf 'PGtime where oidOf = LibPQ.Oid 1083

452−instance OidOf ('PGfixarray ns (null 'PGtime)) where oidOf = LibPQ.Oid 1183

453−instance OidOf ('PGvararray (null 'PGtime)) where oidOf = LibPQ.Oid 1183

454−instance OidOf 'PGtimetz where oidOf = LibPQ.Oid 1266

455−instance OidOf ('PGfixarray ns (null 'PGtimetz)) where oidOf = LibPQ.Oid 1270

456−instance OidOf ('PGvararray (null 'PGtimetz)) where oidOf = LibPQ.Oid 1270

457−instance OidOf 'PGinterval where oidOf = LibPQ.Oid 1186

458−instance OidOf ('PGfixarray ns (null 'PGinterval)) where oidOf = LibPQ.Oid 1187

459−instance OidOf ('PGvararray (null 'PGinterval)) where oidOf = LibPQ.Oid 1187

460−instance OidOf 'PGuuid where oidOf = LibPQ.Oid 2950

461−instance OidOf ('PGfixarray ns (null 'PGuuid)) where oidOf = LibPQ.Oid 2951

462−instance OidOf ('PGvararray (null 'PGuuid)) where oidOf = LibPQ.Oid 2951

463−instance OidOf 'PGinet where oidOf = LibPQ.Oid 869

464−instance OidOf ('PGfixarray ns (null 'PGinet)) where oidOf = LibPQ.Oid 1041

465−instance OidOf ('PGvararray (null 'PGinet)) where oidOf = LibPQ.Oid 1041

466−instance OidOf 'PGjson where oidOf = LibPQ.Oid 114

467−instance OidOf ('PGfixarray ns (null 'PGjson)) where oidOf = LibPQ.Oid 199

468−instance OidOf ('PGvararray (null 'PGjson)) where oidOf = LibPQ.Oid 199

469−instance OidOf 'PGjsonb where oidOf = LibPQ.Oid 3802

470−instance OidOf ('PGfixarray ns (null 'PGjsonb)) where oidOf = LibPQ.Oid 3807

471−instance OidOf ('PGvararray (null 'PGjsonb)) where oidOf = LibPQ.Oid 3807

472−instance OidOf 'PGtsvector where oidOf = LibPQ.Oid 3614

473−instance OidOf ('PGfixarray ns (null 'PGtsvector)) where oidOf = LibPQ.Oid 3643

474−instance OidOf ('PGvararray (null 'PGtsvector)) where oidOf = LibPQ.Oid 3643

475−instance OidOf 'PGtsquery where oidOf = LibPQ.Oid 3615

476−instance OidOf ('PGfixarray ns (null 'PGtsquery)) where oidOf = LibPQ.Oid 3645

477−instance OidOf ('PGvararray (null 'PGtsquery)) where oidOf = LibPQ.Oid 3645

478−instance OidOf 'PGoid where oidOf = LibPQ.Oid 26

479−instance OidOf ('PGfixarray ns (null 'PGoid)) where oidOf = LibPQ.Oid 1028

480−instance OidOf ('PGvararray (null 'PGoid)) where oidOf = LibPQ.Oid 1028

481−instance OidOf ('PGrange 'PGint4) where oidOf = LibPQ.Oid 3904

482−instance OidOf ('PGfixarray ns (null ('PGrange 'PGint4))) where oidOf = LibPQ.Oid 3905

483−instance OidOf ('PGvararray (null ('PGrange 'PGint4))) where oidOf = LibPQ.Oid 3905

484−instance OidOf ('PGrange 'PGint8) where oidOf = LibPQ.Oid 3926

485−instance OidOf ('PGfixarray ns (null ('PGrange 'PGint8))) where oidOf = LibPQ.Oid 3927

486−instance OidOf ('PGvararray (null ('PGrange 'PGint8))) where oidOf = LibPQ.Oid 3927

487−instance OidOf ('PGrange 'PGnumeric) where oidOf = LibPQ.Oid 3906

488−instance OidOf ('PGfixarray ns (null ('PGrange 'PGnumeric))) where oidOf = LibPQ.Oid 3907

489−instance OidOf ('PGvararray (null ('PGrange 'PGnumeric))) where oidOf = LibPQ.Oid 3907

490−instance OidOf ('PGrange 'PGtimestamp) where oidOf = LibPQ.Oid 3908

491−instance OidOf ('PGfixarray ns (null ('PGrange 'PGtimestamp))) where oidOf = LibPQ.Oid 3909

492−instance OidOf ('PGvararray (null ('PGrange 'PGtimestamp))) where oidOf = LibPQ.Oid 3909

493−instance OidOf ('PGrange 'PGtimestamptz) where oidOf = LibPQ.Oid 3910

494−instance OidOf ('PGfixarray ns (null ('PGrange 'PGtimestamptz))) where oidOf = LibPQ.Oid 3911

495−instance OidOf ('PGvararray (null ('PGrange 'PGtimestamptz))) where oidOf = LibPQ.Oid 3911

496−instance OidOf ('PGrange 'PGdate) where oidOf = LibPQ.Oid 3912

497−instance OidOf ('PGfixarray ns (null ('PGrange 'PGdate))) where oidOf = LibPQ.Oid 3913

498−instance OidOf ('PGvararray (null ('PGrange 'PGdate))) where oidOf = LibPQ.Oid 3913

499−instance {-# OVERLAPPABLE #-} OidOf ('PGrange ty) where oidOf = LibPQ.invalidOid

500−instance {-# OVERLAPPABLE #-} OidOf ('PGfixarray ns (null ('PGrange ty))) where oidOf = LibPQ.invalidOid

501−instance {-# OVERLAPPABLE #-} OidOf ('PGvararray (null ('PGrange ty))) where oidOf = LibPQ.invalidOid

502−instance {-# OVERLAPPABLE #-} OidOf ('PGcomposite row) where oidOf = LibPQ.invalidOid

503−instance {-# OVERLAPPABLE #-} OidOf ('PGfixarray ns (null ('PGcomposite row))) where oidOf = LibPQ.invalidOid

504−instance {-# OVERLAPPABLE #-} OidOf ('PGvararray (null ('PGcomposite row))) where oidOf = LibPQ.invalidOid

505−instance {-# OVERLAPPABLE #-} OidOf ('PGenum labels) where oidOf = LibPQ.invalidOid

506−instance {-# OVERLAPPABLE #-} OidOf ('PGfixarray ns (null ('PGenum labels))) where oidOf = LibPQ.invalidOid

507−instance {-# OVERLAPPABLE #-} OidOf ('PGvararray (null ('PGenum labels))) where oidOf = LibPQ.invalidOid

508−

509−class OidOfParam (ty :: NullityType) where oidOfParam :: Oid

510−instance OidOf ty => OidOfParam (null ty) where oidOfParam = oidOf @ty

511−

512−-- | Lifts a `OidOf` constraint to a field.

513−class OidOfField (field :: (Symbol, NullityType)) where

514− oidOfField :: Oid

515−instance OidOf ty => OidOfField (alias ::: nullity ty) where

516− oidOfField = oidOf @ty

401+-- 16

402+class HasOid (ty :: PGType) where oidOf :: Oid

403+instance HasOid 'PGbool where oidOf = Oid 16

404+instance HasOid 'PGint2 where oidOf = Oid 21

405+instance HasOid 'PGint4 where oidOf = Oid 23

406+instance HasOid 'PGint8 where oidOf = Oid 20

407+instance HasOid 'PGnumeric where oidOf = Oid 1700

408+instance HasOid 'PGfloat4 where oidOf = Oid 700

409+instance HasOid 'PGfloat8 where oidOf = Oid 701

410+instance HasOid ('PGchar n) where oidOf = Oid 18

411+instance HasOid ('PGvarchar n) where oidOf = Oid 1043

412+instance HasOid 'PGtext where oidOf = Oid 25

413+instance HasOid 'PGbytea where oidOf = Oid 17

414+instance HasOid 'PGtimestamp where oidOf = Oid 1114

415+instance HasOid 'PGtimestamptz where oidOf = Oid 1184

416+instance HasOid 'PGdate where oidOf = Oid 1082

417+instance HasOid 'PGtime where oidOf = Oid 1083

418+instance HasOid 'PGtimetz where oidOf = Oid 1266

419+instance HasOid 'PGinterval where oidOf = Oid 1186

420+instance HasOid 'PGuuid where oidOf = Oid 2950

421+instance HasOid 'PGinet where oidOf = Oid 869

422+instance HasOid 'PGjson where oidOf = Oid 114

423+instance HasOid 'PGjsonb where oidOf = Oid 3802

424+

425+-- | Lifts a `HasOid` constraint to a field.

426+class HasAliasedOid (field :: (Symbol, NullityType)) where

427+ aliasedOid :: Oid

428+instance HasOid ty => HasAliasedOid (alias ::: nullity ty) where

429+ aliasedOid = oidOf @ty

517430

518431-- | A `ToNullityParam` constraint gives an encoding of a Haskell `Type` into

519432-- into the binary format of a PostgreSQL `NullityType`.

@@ -843,6 +756,3 @@ replicateMN

843756 => m x -> m (NP I xs)

844757replicateMN mx = hsequence' $

845758 hcpure (Proxy :: Proxy ((~) x)) (Comp (I <$> mx))

846−

847−getOid :: LibPQ.Oid -> Word32

848−getOid (LibPQ.Oid (CUInt oid)) = oid

squeal-postgresql/src/Squeal/PostgreSQL/Definition.hs+1032−4

@@ -11,15 +11,13 @@ Squeal data definition language.

1111{-# LANGUAGE

1212 AllowAmbiguousTypes

1313 , ConstraintKinds

14− , DeriveAnyClass

1514 , DeriveGeneric

16− , DerivingStrategies

1715 , FlexibleContexts

1816 , FlexibleInstances

1917 , GADTs

18+ , GeneralizedNewtypeDeriving

2019 , LambdaCase

2120 , MultiParamTypeClasses

22− , OverloadedLabels

2321 , OverloadedStrings

2422 , RankNTypes

2523 , ScopedTypeVariables

@@ -27,7 +25,6 @@ Squeal data definition language.

2725 , TypeInType

2826 , TypeOperators

2927 , UndecidableSuperClasses

30− , UndecidableInstances

3128#-}

3229

3330module Squeal.PostgreSQL.Definition

@@ -35,16 +32,78 @@ module Squeal.PostgreSQL.Definition

3532 Definition (..)

3633 , (>>>)

3734 , manipDefinition

35+ -- * Tables

36+ -- ** Create

37+ , createSchema

38+ , createSchemaIfNotExists

39+ , createTable

40+ , createTableIfNotExists

41+ , createView

42+ , createTypeEnum

43+ , createTypeEnumFrom

44+ , createTypeComposite

45+ , createTypeCompositeFrom

46+ , FieldTyped (..)

47+ , createDomain

48+ , TableConstraintExpression (..)

49+ , check

50+ , unique

51+ , primaryKey

52+ , foreignKey

53+ , ForeignKeyed

54+ , OnDeleteClause (..)

55+ , OnUpdateClause (..)

56+ -- ** Drop

57+ , dropSchema

58+ , dropTable

59+ , dropView

60+ , dropType

61+ -- ** Alter

62+ , alterTable

63+ , alterTableRename

64+ , AlterTable (..)

65+ , addConstraint

66+ , dropConstraint

67+ , AddColumn (..)

68+ , dropColumn

69+ , renameColumn

70+ , alterColumn

71+ , AlterColumn (..)

72+ , setDefault

73+ , dropDefault

74+ , setNotNull

75+ , dropNotNull

76+ , alterType

77+ -- * Columns

78+ , ColumnTypeExpression (..)

79+ , nullable

80+ , notNullable

81+ , default_

82+ , serial2

83+ , smallserial

84+ , serial4

85+ , serial

86+ , serial8

87+ , bigserial

3888 ) where

3989

4090import Control.Category

4191import Control.DeepSeq

4292import Data.ByteString

4393import Data.Monoid

94+import GHC.TypeLits

4495import Prelude hiding ((.), id)

4596

97+import qualified Generics.SOP as SOP

4698import qualified GHC.Generics as GHC

4799

100+import Squeal.PostgreSQL.Alias

101+import Squeal.PostgreSQL.Expression

102+import Squeal.PostgreSQL.Expression.Logic

103+import Squeal.PostgreSQL.Expression.Type

104+import Squeal.PostgreSQL.List

105+import Squeal.PostgreSQL.PG

106+import Squeal.PostgreSQL.Query

48107import Squeal.PostgreSQL.Manipulation

49108import Squeal.PostgreSQL.Render

50109import Squeal.PostgreSQL.Schema

@@ -80,3 +139,972 @@ manipDefinition

80139 -- ^ no input or output

81140 -> Definition schemas schemas

82141manipDefinition = UnsafeDefinition . (<> ";") . renderSQL

142+

143+{-----------------------------------------

144+CREATE statements

145+-----------------------------------------}

146+

147+{- |

148+`createSchema` enters a new schema into the current database.

149+The schema name must be distinct from the name of any existing schema

150+in the current database.

151+

152+A schema is essentially a namespace: it contains named objects

153+(tables, data types, functions, and operators) whose names

154+can duplicate those of other objects existing in other schemas.

155+Named objects are accessed by `QualifiedAlias`es with the schema

156+name as a prefix.

157+-}

158+createSchema

159+ :: KnownSymbol sch

160+ => Alias sch

161+ -> Definition schemas (Create sch '[] schemas)

162+createSchema sch = UnsafeDefinition $

163+ "CREATE" <+> "SCHEMA" <+> renderSQL sch <> ";"

164+

165+{- | Idempotent version of `createSchema`. -}

166+createSchemaIfNotExists

167+ :: (KnownSymbol sch, Has sch schemas schema)

168+ => Alias sch

169+ -> Definition schemas schemas

170+createSchemaIfNotExists sch = UnsafeDefinition $

171+ "CREATE" <+> "SCHEMA" <+> "IF" <+> "NOT" <+> "EXISTS"

172+ <+> renderSQL sch <> ";"

173+

174+{- | `createTable` adds a table to the schema.

175+

176+>>> :set -XOverloadedLabels

177+>>> :{

178+type Table = '[] :=>

179+ '[ "a" ::: 'NoDef :=> 'Null 'PGint4

180+ , "b" ::: 'NoDef :=> 'Null 'PGfloat4 ]

181+:}

182+

183+>>> :{

184+let

185+ setup :: Definition (Public '[]) (Public '["tab" ::: 'Table Table])

186+ setup = createTable #tab

187+ (nullable int `as` #a :* nullable real `as` #b) Nil

188+in printSQL setup

189+:}

190+CREATE TABLE "tab" ("a" int NULL, "b" real NULL);

191+-}

192+createTable

193+ :: ( KnownSymbol sch

194+ , KnownSymbol tab

195+ , columns ~ (col ': cols)

196+ , SOP.SListI columns

197+ , SOP.SListI constraints

198+ , Has sch schemas0 schema0

199+ , schemas1 ~ Alter sch (Create tab ('Table (constraints :=> columns)) schema0) schemas0 )

200+ => QualifiedAlias sch tab -- ^ the name of the table to add

201+ -> NP (Aliased (ColumnTypeExpression schemas0)) columns

202+ -- ^ the names and datatype of each column

203+ -> NP (Aliased (TableConstraintExpression sch tab schemas1)) constraints

204+ -- ^ constraints that must hold for the table

205+ -> Definition schemas0 schemas1

206+createTable tab columns constraints = UnsafeDefinition $

207+ "CREATE TABLE" <+> renderCreation tab columns constraints

208+

209+{-| `createTableIfNotExists` creates a table if it doesn't exist, but does not add it to the schema.

210+Instead, the schema already has the table so if the table did not yet exist, the schema was wrong.

211+`createTableIfNotExists` fixes this. Interestingly, this property makes it an idempotent in

212+the `Category` of `Definition`s.

213+

214+>>> :set -XOverloadedLabels -XTypeApplications

215+>>> :{

216+type Table = '[] :=>

217+ '[ "a" ::: 'NoDef :=> 'Null 'PGint4

218+ , "b" ::: 'NoDef :=> 'Null 'PGfloat4 ]

219+:}

220+

221+>>> type Schemas = Public '["tab" ::: 'Table Table]

222+

223+>>> :{

224+let

225+ setup :: Definition Schemas Schemas

226+ setup = createTableIfNotExists #tab

227+ (nullable int `as` #a :* nullable real `as` #b) Nil

228+in printSQL setup

229+:}

230+CREATE TABLE IF NOT EXISTS "tab" ("a" int NULL, "b" real NULL);

231+-}

232+createTableIfNotExists

233+ :: ( Has sch schemas schema

234+ , Has tab schema ('Table (constraints :=> columns))

235+ , SOP.SListI columns

236+ , SOP.SListI constraints )

237+ => QualifiedAlias sch tab -- ^ the name of the table to add

238+ -> NP (Aliased (ColumnTypeExpression schemas)) columns

239+ -- ^ the names and datatype of each column

240+ -> NP (Aliased (TableConstraintExpression sch tab schemas)) constraints

241+ -- ^ constraints that must hold for the table

242+ -> Definition schemas schemas

243+createTableIfNotExists tab columns constraints = UnsafeDefinition $

244+ "CREATE TABLE IF NOT EXISTS"

245+ <+> renderCreation tab columns constraints

246+

247+-- helper function for `createTable` and `createTableIfNotExists`

248+renderCreation

249+ :: ( KnownSymbol sch

250+ , KnownSymbol tab

251+ , SOP.SListI columns

252+ , SOP.SListI constraints )

253+ => QualifiedAlias sch tab -- ^ the name of the table to add

254+ -> NP (Aliased (ColumnTypeExpression schemas0)) columns

255+ -- ^ the names and datatype of each column

256+ -> NP (Aliased (TableConstraintExpression sch tab schemas1)) constraints

257+ -- ^ constraints that must hold for the table

258+ -> ByteString

259+renderCreation tab columns constraints = renderSQL tab

260+ <+> parenthesized

261+ ( renderCommaSeparated renderColumnDef columns

262+ <> ( case constraints of

263+ Nil -> ""

264+ _ -> ", " <>

265+ renderCommaSeparated renderConstraint constraints ) )

266+ <> ";"

267+ where

268+ renderColumnDef :: Aliased (ColumnTypeExpression schemas) x -> ByteString

269+ renderColumnDef (ty `As` column) =

270+ renderSQL column <+> renderColumnTypeExpression ty

271+ renderConstraint

272+ :: Aliased (TableConstraintExpression sch tab schemas) constraint

273+ -> ByteString

274+ renderConstraint (constraint `As` alias) =

275+ "CONSTRAINT" <+> renderSQL alias <+> renderSQL constraint

276+

277+-- | Data types are a way to limit the kind of data that can be stored in a

278+-- table. For many applications, however, the constraint they provide is

279+-- too coarse. For example, a column containing a product price should

280+-- probably only accept positive values. But there is no standard data type

281+-- that accepts only positive numbers. Another issue is that you might want

282+-- to constrain column data with respect to other columns or rows.

283+-- For example, in a table containing product information,

284+-- there should be only one row for each product number.

285+-- `TableConstraint`s give you as much control over the data in your tables

286+-- as you wish. If a user attempts to store data in a column that would

287+-- violate a constraint, an error is raised. This applies

288+-- even if the value came from the default value definition.

289+newtype TableConstraintExpression

290+ (sch :: Symbol)

291+ (tab :: Symbol)

292+ (schemas :: SchemasType)

293+ (constraint :: TableConstraint)

294+ = UnsafeTableConstraintExpression

295+ { renderTableConstraintExpression :: ByteString }

296+ deriving (GHC.Generic,Show,Eq,Ord,NFData)

297+instance RenderSQL

298+ (TableConstraintExpression sch tab schemas constraint) where

299+ renderSQL = renderTableConstraintExpression

300+

301+{-| A `check` constraint is the most generic `TableConstraint` type.

302+It allows you to specify that the value in a certain column must satisfy

303+a Boolean (truth-value) expression.

304+

305+>>> :{

306+type Schema = '[

307+ "tab" ::: 'Table ('[ "inequality" ::: 'Check '["a","b"]] :=> '[

308+ "a" ::: 'NoDef :=> 'NotNull 'PGint4,

309+ "b" ::: 'NoDef :=> 'NotNull 'PGint4

310+ ])]

311+:}

312+

313+>>> :{

314+let

315+ definition :: Definition (Public '[]) (Public Schema)

316+ definition = createTable #tab

317+ ( (int & notNullable) `as` #a :*

318+ (int & notNullable) `as` #b )

319+ ( check (#a :* #b) (#a .> #b) `as` #inequality )

320+:}

321+

322+>>> printSQL definition

323+CREATE TABLE "tab" ("a" int NOT NULL, "b" int NOT NULL, CONSTRAINT "inequality" CHECK (("a" > "b")));

324+-}

325+check

326+ :: ( Has sch schemas schema

327+ , Has tab schema ('Table table)

328+ , HasAll aliases (TableToRow table) subcolumns )

329+ => NP Alias aliases

330+ -- ^ specify the subcolumns which are getting checked

331+ -> (forall t. Condition '[] '[] 'Ungrouped schemas '[] '[t ::: subcolumns])

332+ -- ^ a closed `Condition` on those subcolumns

333+ -> TableConstraintExpression sch tab schemas ('Check aliases)

334+check _cols condition = UnsafeTableConstraintExpression $

335+ "CHECK" <+> parenthesized (renderSQL condition)

336+

337+{-| A `unique` constraint ensure that the data contained in a column,

338+or a group of columns, is unique among all the rows in the table.

339+

340+>>> :{

341+type Schema = '[

342+ "tab" ::: 'Table( '[ "uq_a_b" ::: 'Unique '["a","b"]] :=> '[

343+ "a" ::: 'NoDef :=> 'Null 'PGint4,

344+ "b" ::: 'NoDef :=> 'Null 'PGint4

345+ ])]

346+:}

347+

348+>>> :{

349+let

350+ definition :: Definition (Public '[]) (Public Schema)

351+ definition = createTable #tab

352+ ( (int & nullable) `as` #a :*

353+ (int & nullable) `as` #b )

354+ ( unique (#a :* #b) `as` #uq_a_b )

355+:}

356+

357+>>> printSQL definition

358+CREATE TABLE "tab" ("a" int NULL, "b" int NULL, CONSTRAINT "uq_a_b" UNIQUE ("a", "b"));

359+-}

360+unique

361+ :: ( Has sch schemas schema

362+ , Has tab schema('Table table)

363+ , HasAll aliases (TableToRow table) subcolumns )

364+ => NP Alias aliases

365+ -- ^ specify subcolumns which together are unique for each row

366+ -> TableConstraintExpression sch tab schemas ('Unique aliases)

367+unique columns = UnsafeTableConstraintExpression $

368+ "UNIQUE" <+> parenthesized (renderSQL columns)

369+

370+{-| A `primaryKey` constraint indicates that a column, or group of columns,

371+can be used as a unique identifier for rows in the table.

372+This requires that the values be both unique and not null.

373+

374+>>> :{

375+type Schema = '[

376+ "tab" ::: 'Table ('[ "pk_id" ::: 'PrimaryKey '["id"]] :=> '[

377+ "id" ::: 'Def :=> 'NotNull 'PGint4,

378+ "name" ::: 'NoDef :=> 'NotNull 'PGtext

379+ ])]

380+:}

381+

382+>>> :{

383+let

384+ definition :: Definition (Public '[]) (Public Schema)

385+ definition = createTable #tab

386+ ( serial `as` #id :*

387+ (text & notNullable) `as` #name )

388+ ( primaryKey #id `as` #pk_id )

389+:}

390+

391+>>> printSQL definition

392+CREATE TABLE "tab" ("id" serial, "name" text NOT NULL, CONSTRAINT "pk_id" PRIMARY KEY ("id"));

393+-}

394+primaryKey

395+ :: ( Has sch schemas schema

396+ , Has tab schema ('Table table)

397+ , HasAll aliases (TableToColumns table) subcolumns

398+ , AllNotNull subcolumns )

399+ => NP Alias aliases

400+ -- ^ specify the subcolumns which together form a primary key.

401+ -> TableConstraintExpression sch tab schemas ('PrimaryKey aliases)

402+primaryKey columns = UnsafeTableConstraintExpression $

403+ "PRIMARY KEY" <+> parenthesized (renderSQL columns)

404+

405+{-| A `foreignKey` specifies that the values in a column

406+(or a group of columns) must match the values appearing in some row of

407+another table. We say this maintains the referential integrity

408+between two related tables.

409+

410+>>> :{

411+type Schema =

412+ '[ "users" ::: 'Table (

413+ '[ "pk_users" ::: 'PrimaryKey '["id"] ] :=>

414+ '[ "id" ::: 'Def :=> 'NotNull 'PGint4

415+ , "name" ::: 'NoDef :=> 'NotNull 'PGtext

416+ ])

417+ , "emails" ::: 'Table (

418+ '[ "pk_emails" ::: 'PrimaryKey '["id"]

419+ , "fk_user_id" ::: 'ForeignKey '["user_id"] "users" '["id"]

420+ ] :=>

421+ '[ "id" ::: 'Def :=> 'NotNull 'PGint4

422+ , "user_id" ::: 'NoDef :=> 'NotNull 'PGint4

423+ , "email" ::: 'NoDef :=> 'Null 'PGtext

424+ ])

425+ ]

426+:}

427+

428+>>> :{

429+let

430+ setup :: Definition (Public '[]) (Public Schema)

431+ setup =

432+ createTable #users

433+ ( serial `as` #id :*

434+ (text & notNullable) `as` #name )

435+ ( primaryKey #id `as` #pk_users ) >>>

436+ createTable #emails

437+ ( serial `as` #id :*

438+ (int & notNullable) `as` #user_id :*

439+ (text & nullable) `as` #email )

440+ ( primaryKey #id `as` #pk_emails :*

441+ foreignKey #user_id #users #id

442+ OnDeleteCascade OnUpdateCascade `as` #fk_user_id )

443+in printSQL setup

444+:}

445+CREATE TABLE "users" ("id" serial, "name" text NOT NULL, CONSTRAINT "pk_users" PRIMARY KEY ("id"));

446+CREATE TABLE "emails" ("id" serial, "user_id" int NOT NULL, "email" text NULL, CONSTRAINT "pk_emails" PRIMARY KEY ("id"), CONSTRAINT "fk_user_id" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE);

447+

448+A `foreignKey` can even be a table self-reference.

449+

450+>>> :{

451+type Schema =

452+ '[ "employees" ::: 'Table (

453+ '[ "employees_pk" ::: 'PrimaryKey '["id"]

454+ , "employees_employer_fk" ::: 'ForeignKey '["employer_id"] "employees" '["id"]

455+ ] :=>

456+ '[ "id" ::: 'Def :=> 'NotNull 'PGint4

457+ , "name" ::: 'NoDef :=> 'NotNull 'PGtext

458+ , "employer_id" ::: 'NoDef :=> 'Null 'PGint4

459+ ])

460+ ]

461+:}

462+

463+>>> :{

464+let

465+ setup :: Definition (Public '[]) (Public Schema)

466+ setup =

467+ createTable #employees

468+ ( serial `as` #id :*

469+ (text & notNullable) `as` #name :*

470+ (integer & nullable) `as` #employer_id )

471+ ( primaryKey #id `as` #employees_pk :*

472+ foreignKey #employer_id #employees #id

473+ OnDeleteCascade OnUpdateCascade `as` #employees_employer_fk )

474+in printSQL setup

475+:}

476+CREATE TABLE "employees" ("id" serial, "name" text NOT NULL, "employer_id" integer NULL, CONSTRAINT "employees_pk" PRIMARY KEY ("id"), CONSTRAINT "employees_employer_fk" FOREIGN KEY ("employer_id") REFERENCES "employees" ("id") ON DELETE CASCADE ON UPDATE CASCADE);

477+-}

478+foreignKey

479+ :: (ForeignKeyed schemas sch schema child parent

480+ table reftable

481+ columns refcolumns

482+ constraints cols

483+ reftys tys )

484+ => NP Alias columns

485+ -- ^ column or columns in the table

486+ -> Alias parent

487+ -- ^ reference table

488+ -> NP Alias refcolumns

489+ -- ^ reference column or columns in the reference table

490+ -> OnDeleteClause

491+ -- ^ what to do when reference is deleted

492+ -> OnUpdateClause

493+ -- ^ what to do when reference is updated

494+ -> TableConstraintExpression sch child schemas

495+ ('ForeignKey columns parent refcolumns)

496+foreignKey keys parent refs ondel onupd = UnsafeTableConstraintExpression $

497+ "FOREIGN KEY" <+> parenthesized (renderSQL keys)

498+ <+> "REFERENCES" <+> renderSQL parent

499+ <+> parenthesized (renderSQL refs)

500+ <+> renderSQL ondel

501+ <+> renderSQL onupd

502+

503+-- | A constraint synonym between types involved in a foreign key constraint.

504+type ForeignKeyed schemas

505+ sch

506+ schema

507+ child parent

508+ table reftable

509+ columns refcolumns

510+ constraints cols

511+ reftys tys =

512+ ( Has sch schemas schema

513+ , Has child schema ('Table table)

514+ , Has parent schema ('Table reftable)

515+ , HasAll columns (TableToColumns table) tys

516+ , reftable ~ (constraints :=> cols)

517+ , HasAll refcolumns cols reftys

518+ , SOP.AllZip SamePGType tys reftys

519+ , Uniquely refcolumns constraints )

520+

521+-- | `OnDeleteClause` indicates what to do with rows that reference a deleted row.

522+data OnDeleteClause

523+ = OnDeleteNoAction

524+ -- ^ if any referencing rows still exist when the constraint is checked,

525+ -- an error is raised

526+ | OnDeleteRestrict -- ^ prevents deletion of a referenced row

527+ | OnDeleteCascade

528+ -- ^ specifies that when a referenced row is deleted,

529+ -- row(s) referencing it should be automatically deleted as well

530+ deriving (GHC.Generic,Show,Eq,Ord)

531+instance NFData OnDeleteClause

532+-- | Render `OnDeleteClause`.

533+instance RenderSQL OnDeleteClause where

534+ renderSQL = \case

535+ OnDeleteNoAction -> "ON DELETE NO ACTION"

536+ OnDeleteRestrict -> "ON DELETE RESTRICT"

537+ OnDeleteCascade -> "ON DELETE CASCADE"

538+

539+-- | Analagous to `OnDeleteClause` there is also `OnUpdateClause` which is invoked

540+-- when a referenced column is changed (updated).

541+data OnUpdateClause

542+ = OnUpdateNoAction

543+ -- ^ if any referencing rows has not changed when the constraint is checked,

544+ -- an error is raised

545+ | OnUpdateRestrict -- ^ prevents update of a referenced row

546+ | OnUpdateCascade

547+ -- ^ the updated values of the referenced column(s) should be copied

548+ -- into the referencing row(s)

549+ deriving (GHC.Generic,Show,Eq,Ord)

550+instance NFData OnUpdateClause

551+

552+-- | Render `OnUpdateClause`.

553+instance RenderSQL OnUpdateClause where

554+ renderSQL = \case

555+ OnUpdateNoAction -> "ON UPDATE NO ACTION"

556+ OnUpdateRestrict -> "ON UPDATE RESTRICT"

557+ OnUpdateCascade -> "ON UPDATE CASCADE"

558+

559+{-----------------------------------------

560+DROP statements

561+-----------------------------------------}

562+

563+-- | >>> :{

564+-- let

565+-- definition :: Definition '["muh_schema" ::: schema, "public" ::: public] '["public" ::: public]

566+-- definition = dropSchema #muh_schema

567+-- :}

568+--

569+-- >>> printSQL definition

570+-- DROP SCHEMA "muh_schema";

571+dropSchema

572+ :: Has sch schemas schema

573+ => Alias sch

574+ -> Definition schemas (Drop sch schemas)

575+dropSchema sch = UnsafeDefinition $ "DROP SCHEMA" <+> renderSQL sch <> ";"

576+

577+-- | `dropTable` removes a table from the schema.

578+--

579+-- >>> :{

580+-- let

581+-- definition :: Definition '["public" ::: '["muh_table" ::: 'Table t]] (Public '[])

582+-- definition = dropTable #muh_table

583+-- :}

584+--

585+-- >>> printSQL definition

586+-- DROP TABLE "muh_table";

587+dropTable

588+ :: ( Has sch schemas schema

589+ , Has tab schema ('Table table))

590+ => QualifiedAlias sch tab -- ^ table to remove

591+ -> Definition schemas (Alter sch (Drop tab schema) schemas)

592+dropTable tab = UnsafeDefinition $ "DROP TABLE" <+> renderSQL tab <> ";"

593+

594+{-----------------------------------------

595+ALTER statements

596+-----------------------------------------}

597+

598+-- | `alterTable` changes the definition of a table from the schema.

599+alterTable

600+ :: (Has sch schemas schema, Has tab schema ('Table table0))

601+ => QualifiedAlias sch tab -- ^ table to alter

602+ -> AlterTable sch tab schemas table1 -- ^ alteration to perform

603+ -> Definition schemas (Alter sch (Alter tab ('Table table1) schema) schemas)

604+alterTable tab alteration = UnsafeDefinition $

605+ "ALTER TABLE"

606+ <+> renderSQL tab

607+ <+> renderAlterTable alteration

608+ <> ";"

609+

610+-- | `alterTableRename` changes the name of a table from the schema.

611+--

612+-- >>> printSQL $ alterTableRename #foo #bar

613+-- ALTER TABLE "foo" RENAME TO "bar";

614+alterTableRename

615+ :: (KnownSymbol table0, KnownSymbol table1)

616+ => Alias table0 -- ^ table to rename

617+ -> Alias table1 -- ^ what to rename it

618+ -> Definition schema (Rename table0 table1 schema)

619+alterTableRename table0 table1 = UnsafeDefinition $

620+ "ALTER TABLE" <+> renderSQL table0

621+ <+> "RENAME TO" <+> renderSQL table1 <> ";"

622+

623+-- | An `AlterTable` describes the alteration to perform on the columns

624+-- of a table.

625+newtype AlterTable

626+ (sch :: Symbol)

627+ (tab :: Symbol)

628+ (schemas :: SchemasType)

629+ (table :: TableType) =

630+ UnsafeAlterTable {renderAlterTable :: ByteString}

631+ deriving (GHC.Generic,Show,Eq,Ord,NFData)

632+

633+-- | An `addConstraint` adds a table constraint.

634+--

635+-- >>> :{

636+-- let

637+-- definition :: Definition

638+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

639+-- '["public" ::: '["tab" ::: 'Table ('["positive" ::: 'Check '["col"]] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

640+-- definition = alterTable #tab (addConstraint #positive (check #col (#col .> 0)))

641+-- in printSQL definition

642+-- :}

643+-- ALTER TABLE "tab" ADD CONSTRAINT "positive" CHECK (("col" > 0));

644+addConstraint

645+ :: ( KnownSymbol alias

646+ , Has sch schemas schema

647+ , Has tab schema ('Table table0)

648+ , table0 ~ (constraints :=> columns)

649+ , table1 ~ (Create alias constraint constraints :=> columns) )

650+ => Alias alias

651+ -> TableConstraintExpression sch tab schemas constraint

652+ -- ^ constraint to add

653+ -> AlterTable sch tab schemas table1

654+addConstraint alias constraint = UnsafeAlterTable $

655+ "ADD" <+> "CONSTRAINT" <+> renderSQL alias

656+ <+> renderSQL constraint

657+

658+-- | A `dropConstraint` drops a table constraint.

659+--

660+-- >>> :{

661+-- let

662+-- definition :: Definition

663+-- '["public" ::: '["tab" ::: 'Table ('["positive" ::: Check '["col"]] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

664+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

665+-- definition = alterTable #tab (dropConstraint #positive)

666+-- in printSQL definition

667+-- :}

668+-- ALTER TABLE "tab" DROP CONSTRAINT "positive";

669+dropConstraint

670+ :: ( KnownSymbol constraint

671+ , Has sch schemas schema

672+ , Has tab schema ('Table table0)

673+ , table0 ~ (constraints :=> columns)

674+ , table1 ~ (Drop constraint constraints :=> columns) )

675+ => Alias constraint

676+ -- ^ constraint to drop

677+ -> AlterTable sch tab schemas table1

678+dropConstraint constraint = UnsafeAlterTable $

679+ "DROP" <+> "CONSTRAINT" <+> renderSQL constraint

680+

681+-- | An `AddColumn` is either @NULL@ or has @DEFAULT@.

682+class AddColumn ty where

683+ -- | `addColumn` adds a new column, initially filled with whatever

684+ -- default value is given or with @NULL@.

685+ --

686+ -- >>> :{

687+ -- let

688+ -- definition :: Definition

689+ -- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

690+ -- '["public" ::: '["tab" ::: 'Table ('[] :=>

691+ -- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

692+ -- , "col2" ::: 'Def :=> 'Null 'PGtext ])]]

693+ -- definition = alterTable #tab (addColumn #col2 (text & nullable & default_ "foo"))

694+ -- in printSQL definition

695+ -- :}

696+ -- ALTER TABLE "tab" ADD COLUMN "col2" text NULL DEFAULT E'foo';

697+ --

698+ -- >>> :{

699+ -- let

700+ -- definition :: Definition

701+ -- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

702+ -- '["public" ::: '["tab" ::: 'Table ('[] :=>

703+ -- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

704+ -- , "col2" ::: 'NoDef :=> 'Null 'PGtext ])]]

705+ -- definition = alterTable #tab (addColumn #col2 (text & nullable))

706+ -- in printSQL definition

707+ -- :}

708+ -- ALTER TABLE "tab" ADD COLUMN "col2" text NULL;

709+ addColumn

710+ :: ( KnownSymbol column

711+ , Has sch schemas schema

712+ , Has tab schema ('Table table0)

713+ , table0 ~ (constraints :=> columns) )

714+ => Alias column -- ^ column to add

715+ -> ColumnTypeExpression schemas ty -- ^ type of the new column

716+ -> AlterTable sch tab schemas (constraints :=> Create column ty columns)

717+ addColumn column ty = UnsafeAlterTable $

718+ "ADD COLUMN" <+> renderSQL column <+> renderColumnTypeExpression ty

719+instance {-# OVERLAPPING #-} AddColumn ('Def :=> ty)

720+instance {-# OVERLAPPABLE #-} AddColumn ('NoDef :=> 'Null ty)

721+

722+-- | A `dropColumn` removes a column. Whatever data was in the column

723+-- disappears. Table constraints involving the column are dropped, too.

724+-- However, if the column is referenced by a foreign key constraint of

725+-- another table, PostgreSQL will not silently drop that constraint.

726+--

727+-- >>> :{

728+-- let

729+-- definition :: Definition

730+-- '["public" ::: '["tab" ::: 'Table ('[] :=>

731+-- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

732+-- , "col2" ::: 'NoDef :=> 'Null 'PGtext ])]]

733+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

734+-- definition = alterTable #tab (dropColumn #col2)

735+-- in printSQL definition

736+-- :}

737+-- ALTER TABLE "tab" DROP COLUMN "col2";

738+dropColumn

739+ :: ( KnownSymbol column

740+ , Has sch schemas schema

741+ , Has tab schema ('Table table0)

742+ , table0 ~ (constraints :=> columns)

743+ , table1 ~ (constraints :=> Drop column columns) )

744+ => Alias column -- ^ column to remove

745+ -> AlterTable sch tab schemas table1

746+dropColumn column = UnsafeAlterTable $

747+ "DROP COLUMN" <+> renderSQL column

748+

749+-- | A `renameColumn` renames a column.

750+--

751+-- >>> :{

752+-- let

753+-- definition :: Definition

754+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["foo" ::: 'NoDef :=> 'Null 'PGint4])]]

755+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["bar" ::: 'NoDef :=> 'Null 'PGint4])]]

756+-- definition = alterTable #tab (renameColumn #foo #bar)

757+-- in printSQL definition

758+-- :}

759+-- ALTER TABLE "tab" RENAME COLUMN "foo" TO "bar";

760+renameColumn

761+ :: ( KnownSymbol column0

762+ , KnownSymbol column1

763+ , Has sch schemas schema

764+ , Has tab schema ('Table table0)

765+ , table0 ~ (constraints :=> columns)

766+ , table1 ~ (constraints :=> Rename column0 column1 columns) )

767+ => Alias column0 -- ^ column to rename

768+ -> Alias column1 -- ^ what to rename the column

769+ -> AlterTable sch tab schemas table1

770+renameColumn column0 column1 = UnsafeAlterTable $

771+ "RENAME COLUMN" <+> renderSQL column0 <+> "TO" <+> renderSQL column1

772+

773+-- | An `alterColumn` alters a single column.

774+alterColumn

775+ :: ( KnownSymbol column

776+ , Has sch schemas schema

777+ , Has tab schema ('Table table0)

778+ , table0 ~ (constraints :=> columns)

779+ , Has column columns ty0

780+ , table1 ~ (constraints :=> Alter column ty1 columns))

781+ => Alias column -- ^ column to alter

782+ -> AlterColumn schemas ty0 ty1 -- ^ alteration to perform

783+ -> AlterTable sch tab schemas table1

784+alterColumn column alteration = UnsafeAlterTable $

785+ "ALTER COLUMN" <+> renderSQL column <+> renderAlterColumn alteration

786+

787+-- | An `AlterColumn` describes the alteration to perform on a single column.

788+newtype AlterColumn (schemas :: SchemasType) (ty0 :: ColumnType) (ty1 :: ColumnType) =

789+ UnsafeAlterColumn {renderAlterColumn :: ByteString}

790+ deriving (GHC.Generic,Show,Eq,Ord,NFData)

791+

792+-- | A `setDefault` sets a new default for a column. Note that this doesn't

793+-- affect any existing rows in the table, it just changes the default for

794+-- future insert and update commands.

795+--

796+-- >>> :{

797+-- let

798+-- definition :: Definition

799+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

800+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'Def :=> 'Null 'PGint4])]]

801+-- definition = alterTable #tab (alterColumn #col (setDefault 5))

802+-- in printSQL definition

803+-- :}

804+-- ALTER TABLE "tab" ALTER COLUMN "col" SET DEFAULT 5;

805+setDefault

806+ :: Expression '[] '[] 'Ungrouped schemas '[] '[] ty -- ^ default value to set

807+ -> AlterColumn schemas (constraint :=> ty) ('Def :=> ty)

808+setDefault expression = UnsafeAlterColumn $

809+ "SET DEFAULT" <+> renderExpression expression

810+

811+-- | A `dropDefault` removes any default value for a column.

812+--

813+-- >>> :{

814+-- let

815+-- definition :: Definition

816+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'Def :=> 'Null 'PGint4])]]

817+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

818+-- definition = alterTable #tab (alterColumn #col dropDefault)

819+-- in printSQL definition

820+-- :}

821+-- ALTER TABLE "tab" ALTER COLUMN "col" DROP DEFAULT;

822+dropDefault :: AlterColumn schemas ('Def :=> ty) ('NoDef :=> ty)

823+dropDefault = UnsafeAlterColumn $ "DROP DEFAULT"

824+

825+-- | A `setNotNull` adds a @NOT NULL@ constraint to a column.

826+-- The constraint will be checked immediately, so the table data must satisfy

827+-- the constraint before it can be added.

828+--

829+-- >>> :{

830+-- let

831+-- definition :: Definition

832+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

833+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

834+-- definition = alterTable #tab (alterColumn #col setNotNull)

835+-- in printSQL definition

836+-- :}

837+-- ALTER TABLE "tab" ALTER COLUMN "col" SET NOT NULL;

838+setNotNull

839+ :: AlterColumn schemas (constraint :=> 'Null ty) (constraint :=> 'NotNull ty)

840+setNotNull = UnsafeAlterColumn $ "SET NOT NULL"

841+

842+-- | A `dropNotNull` drops a @NOT NULL@ constraint from a column.

843+--

844+-- >>> :{

845+-- let

846+-- definition :: Definition

847+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

848+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

849+-- definition = alterTable #tab (alterColumn #col dropNotNull)

850+-- in printSQL definition

851+-- :}

852+-- ALTER TABLE "tab" ALTER COLUMN "col" DROP NOT NULL;

853+dropNotNull

854+ :: AlterColumn schemas (constraint :=> 'NotNull ty) (constraint :=> 'Null ty)

855+dropNotNull = UnsafeAlterColumn $ "DROP NOT NULL"

856+

857+-- | An `alterType` converts a column to a different data type.

858+-- This will succeed only if each existing entry in the column can be

859+-- converted to the new type by an implicit cast.

860+--

861+-- >>> :{

862+-- let

863+-- definition :: Definition

864+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

865+-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGnumeric])]]

866+-- definition =

867+-- alterTable #tab (alterColumn #col (alterType (numeric & notNullable)))

868+-- in printSQL definition

869+-- :}

870+-- ALTER TABLE "tab" ALTER COLUMN "col" TYPE numeric NOT NULL;

871+alterType :: ColumnTypeExpression schemas ty -> AlterColumn schemas ty0 ty

872+alterType ty = UnsafeAlterColumn $ "TYPE" <+> renderColumnTypeExpression ty

873+

874+{- | Create a view.

875+>>> type ABC = '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4]

876+>>> type BC = '["b" ::: 'Null 'PGint4, "c" ::: 'Null 'PGint4]

877+>>> :{

878+let

879+ definition :: Definition

880+ '[ "public" ::: '["abc" ::: 'Table ('[] :=> ABC)]]

881+ '[ "public" ::: '["abc" ::: 'Table ('[] :=> ABC), "bc" ::: 'View BC]]

882+ definition =

883+ createView #bc (select_ (#b :* #c) (from (table #abc)))

884+in printSQL definition

885+:}

886+CREATE VIEW "bc" AS SELECT "b" AS "b", "c" AS "c" FROM "abc" AS "abc";

887+-}

888+createView

889+ :: (KnownSymbol sch, KnownSymbol vw, Has sch schemas schema)

890+ => QualifiedAlias sch vw -- ^ the name of the view to add

891+ -> Query '[] '[] schemas '[] view -- ^ query

892+ -> Definition schemas (Alter sch (Create vw ('View view) schema) schemas)

893+createView alias query = UnsafeDefinition $

894+ "CREATE" <+> "VIEW" <+> renderSQL alias <+> "AS"

895+ <+> renderQuery query <> ";"

896+

897+-- | Drop a view.

898+--

899+-- >>> :{

900+-- let

901+-- definition :: Definition

902+-- '[ "public" ::: '["abc" ::: 'Table ('[] :=> '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4])

903+-- , "bc" ::: 'View ('["b" ::: 'Null 'PGint4, "c" ::: 'Null 'PGint4])]]

904+-- '[ "public" ::: '["abc" ::: 'Table ('[] :=> '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4])]]

905+-- definition = dropView #bc

906+-- in printSQL definition

907+-- :}

908+-- DROP VIEW "bc";

909+dropView

910+ :: (Has sch schemas schema, Has vw schema ('View view))

911+ => QualifiedAlias sch vw -- ^ view to remove

912+ -> Definition schemas (Alter sch (Drop vw schema) schemas)

913+dropView vw = UnsafeDefinition $ "DROP VIEW" <+> renderSQL vw <> ";"

914+

915+-- | Enumerated types are created using the `createTypeEnum` command, for example

916+--

917+-- >>> printSQL $ (createTypeEnum #mood (label @"sad" :* label @"ok" :* label @"happy") :: Definition (Public '[]) '["public" ::: '["mood" ::: 'Typedef ('PGenum '["sad","ok","happy"])]])

918+-- CREATE TYPE "mood" AS ENUM ('sad', 'ok', 'happy');

919+createTypeEnum

920+ :: (KnownSymbol enum, Has sch schemas schema, SOP.All KnownSymbol labels)

921+ => QualifiedAlias sch enum

922+ -- ^ name of the user defined enumerated type

923+ -> NP PGlabel labels

924+ -- ^ labels of the enumerated type

925+ -> Definition schemas (Alter sch (Create enum ('Typedef ('PGenum labels)) schema) schemas)

926+createTypeEnum enum labels = UnsafeDefinition $

927+ "CREATE" <+> "TYPE" <+> renderSQL enum <+> "AS" <+> "ENUM" <+>

928+ parenthesized (renderSQL labels) <> ";"

929+

930+-- | Enumerated types can also be generated from a Haskell type, for example

931+--

932+-- >>> data Schwarma = Beef | Lamb | Chicken deriving GHC.Generic

933+-- >>> instance SOP.Generic Schwarma

934+-- >>> instance SOP.HasDatatypeInfo Schwarma

935+-- >>> :{

936+-- let

937+-- createSchwarma :: Definition (Public '[]) '["public" ::: '["schwarma" ::: 'Typedef (PG (Enumerated Schwarma))]]

938+-- createSchwarma = createTypeEnumFrom @Schwarma #schwarma

939+-- in

940+-- printSQL createSchwarma

941+-- :}

942+-- CREATE TYPE "schwarma" AS ENUM ('Beef', 'Lamb', 'Chicken');

943+createTypeEnumFrom

944+ :: forall hask sch enum schemas schema.

945+ ( SOP.Generic hask

946+ , SOP.All KnownSymbol (LabelsPG hask)

947+ , KnownSymbol enum

948+ , Has sch schemas schema )

949+ => QualifiedAlias sch enum

950+ -- ^ name of the user defined enumerated type

951+ -> Definition schemas (Alter sch (Create enum ('Typedef (PG (Enumerated hask))) schema) schemas)

952+createTypeEnumFrom enum = createTypeEnum enum

953+ (SOP.hpure label :: NP PGlabel (LabelsPG hask))

954+

955+{- | `createTypeComposite` creates a composite type. The composite type is

956+specified by a list of attribute names and data types.

957+

958+>>> :{

959+type PGcomplex = 'PGcomposite

960+ '[ "real" ::: 'NotNull 'PGfloat8

961+ , "imaginary" ::: 'NotNull 'PGfloat8 ]

962+:}

963+

964+>>> :{

965+let

966+ setup :: Definition (Public '[]) '["public" ::: '["complex" ::: 'Typedef PGcomplex]]

967+ setup = createTypeComposite #complex

968+ (float8 `as` #real :* float8 `as` #imaginary)

969+in printSQL setup

970+:}

971+CREATE TYPE "complex" AS ("real" float8, "imaginary" float8);

972+-}

973+createTypeComposite

974+ :: (KnownSymbol ty, Has sch schemas schema, SOP.SListI fields)

975+ => QualifiedAlias sch ty

976+ -- ^ name of the user defined composite type

977+ -> NP (Aliased (TypeExpression schemas)) fields

978+ -- ^ list of attribute names and data types

979+ -> Definition schemas (Alter sch (Create ty ('Typedef ('PGcomposite fields)) schema) schemas)

980+createTypeComposite ty fields = UnsafeDefinition $

981+ "CREATE" <+> "TYPE" <+> renderSQL ty <+> "AS" <+> parenthesized

982+ (renderCommaSeparated renderField fields) <> ";"

983+ where

984+ renderField :: Aliased (TypeExpression schemas) x -> ByteString

985+ renderField (typ `As` alias) =

986+ renderSQL alias <+> renderSQL typ

987+

988+-- | Composite types can also be generated from a Haskell type, for example

989+--

990+-- >>> data Complex = Complex {real :: Double, imaginary :: Double} deriving GHC.Generic

991+-- >>> instance SOP.Generic Complex

992+-- >>> instance SOP.HasDatatypeInfo Complex

993+-- >>> type Schema = '["complex" ::: 'Typedef (PG (Composite Complex))]

994+-- >>> :{

995+-- let

996+-- createComplex :: Definition (Public '[]) (Public Schema)

997+-- createComplex = createTypeCompositeFrom @Complex #complex

998+-- in

999+-- printSQL createComplex

1000+-- :}

1001+-- CREATE TYPE "complex" AS ("real" float8, "imaginary" float8);

1002+createTypeCompositeFrom

1003+ :: forall hask sch ty schemas schema.

1004+ ( SOP.All (FieldTyped schemas) (RowPG hask)

1005+ , KnownSymbol ty

1006+ , Has sch schemas schema )

1007+ => QualifiedAlias sch ty

1008+ -- ^ name of the user defined composite type

1009+ -> Definition schemas (Alter sch (Create ty ( 'Typedef (PG (Composite hask))) schema) schemas)

1010+createTypeCompositeFrom ty = createTypeComposite ty

1011+ (SOP.hcpure (SOP.Proxy :: SOP.Proxy (FieldTyped schemas)) fieldtype

1012+ :: NP (Aliased (TypeExpression schemas)) (RowPG hask))

1013+

1014+{-|

1015+`createDomain` creates a new domain. A domain is essentially a data type

1016+with constraints (restrictions on the allowed set of values).

1017+

1018+Domains are useful for abstracting common constraints on fields

1019+into a single location for maintenance. For example, several tables might

1020+contain email address columns, all requiring the same `check` constraint

1021+to verify the address syntax. Define a domain rather than setting up

1022+each table's constraint individually.

1023+

1024+>>> :{

1025+let

1026+ createPositive :: Definition (Public '[]) (Public '["positive" ::: 'Typedef 'PGfloat4])

1027+ createPositive = createDomain #positive real (#value .> 0 .&& (#value & isNotNull))

1028+in printSQL createPositive

1029+:}

1030+CREATE DOMAIN "positive" AS real CHECK ((("value" > 0) AND "value" IS NOT NULL));

1031+-}

1032+createDomain

1033+ :: (Has sch schemas schema, KnownSymbol dom)

1034+ => QualifiedAlias sch dom

1035+ -> (forall nullity. TypeExpression schemas (nullity ty))

1036+ -> (forall tab. Condition '[] '[] 'Ungrouped schemas '[] '[tab ::: '["value" ::: 'Null ty]])

1037+ -> Definition schemas (Alter sch (Create alias ('Typedef ty) schema) schemas)

1038+createDomain dom ty condition =

1039+ UnsafeDefinition $ "CREATE DOMAIN" <+> renderSQL dom

1040+ <+> "AS" <+> renderTypeExpression ty

1041+ <+> "CHECK" <+> parenthesized (renderSQL condition) <> ";"

1042+

1043+-- | Lift `PGTyped` to a field

1044+class FieldTyped schemas ty where

1045+ fieldtype :: Aliased (TypeExpression schemas) ty

1046+instance (KnownSymbol alias, PGTyped schemas ty)

1047+ => FieldTyped schemas (alias ::: ty) where

1048+ fieldtype = pgtype `As` Alias

1049+

1050+-- | Drop a type.

1051+--

1052+-- >>> data Schwarma = Beef | Lamb | Chicken deriving GHC.Generic

1053+-- >>> instance SOP.Generic Schwarma

1054+-- >>> instance SOP.HasDatatypeInfo Schwarma

1055+-- >>> printSQL (dropType #schwarma :: Definition '["public" ::: '["schwarma" ::: 'Typedef (PG (Enumerated Schwarma))]] (Public '[]))

1056+-- DROP TYPE "schwarma";

1057+dropType

1058+ :: (Has sch schemas schema, Has td schema ('Typedef ty))

1059+ => QualifiedAlias sch td

1060+ -- ^ name of the user defined type

1061+ -> Definition schemas (Alter sch (Drop td schema) schemas)

1062+dropType tydef = UnsafeDefinition $ "DROP" <+> "TYPE" <+> renderSQL tydef <> ";"

1063+

1064+-- | `ColumnTypeExpression`s are used in `createTable` commands.

1065+newtype ColumnTypeExpression (schemas :: SchemasType) (ty :: ColumnType)

1066+ = UnsafeColumnTypeExpression { renderColumnTypeExpression :: ByteString }

1067+ deriving (GHC.Generic,Show,Eq,Ord,NFData)

1068+instance RenderSQL (ColumnTypeExpression schemas ty) where

1069+ renderSQL = renderColumnTypeExpression

1070+

1071+-- | used in `createTable` commands as a column constraint to note that

1072+-- @NULL@ may be present in a column

1073+nullable

1074+ :: TypeExpression schemas (nullity ty)

1075+ -> ColumnTypeExpression schemas ('NoDef :=> 'Null ty)

1076+nullable ty = UnsafeColumnTypeExpression $ renderSQL ty <+> "NULL"

1077+

1078+-- | used in `createTable` commands as a column constraint to ensure

1079+-- @NULL@ is not present in a column

1080+notNullable

1081+ :: TypeExpression schemas (nullity ty)

1082+ -> ColumnTypeExpression schemas ('NoDef :=> 'NotNull ty)

1083+notNullable ty = UnsafeColumnTypeExpression $ renderSQL ty <+> "NOT NULL"

1084+

1085+-- | used in `createTable` commands as a column constraint to give a default

1086+default_

1087+ :: Expression '[] '[] 'Ungrouped schemas '[] '[] ty

1088+ -> ColumnTypeExpression schemas ('NoDef :=> ty)

1089+ -> ColumnTypeExpression schemas ('Def :=> ty)

1090+default_ x ty = UnsafeColumnTypeExpression $

1091+ renderSQL ty <+> "DEFAULT" <+> renderExpression x

1092+

1093+-- | not a true type, but merely a notational convenience for creating

1094+-- unique identifier columns with type `PGint2`

1095+serial2, smallserial

1096+ :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint2)

1097+serial2 = UnsafeColumnTypeExpression "serial2"

1098+smallserial = UnsafeColumnTypeExpression "smallserial"

1099+-- | not a true type, but merely a notational convenience for creating

1100+-- unique identifier columns with type `PGint4`

1101+serial4, serial

1102+ :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint4)

1103+serial4 = UnsafeColumnTypeExpression "serial4"

1104+serial = UnsafeColumnTypeExpression "serial"

1105+-- | not a true type, but merely a notational convenience for creating

1106+-- unique identifier columns with type `PGint8`

1107+serial8, bigserial

1108+ :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint8)

1109+serial8 = UnsafeColumnTypeExpression "serial8"

1110+bigserial = UnsafeColumnTypeExpression "bigserial"

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Function.hsdeleted−238

@@ -1,238 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Function

3−Description: Create and drop function and operator definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create and drop function and operator definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Function

33− ( createFunction

34− , createOrReplaceFunction

35− , createSetFunction

36− , createOrReplaceSetFunction

37− , createBinaryOp

38− , createLeftOp

39− , createRightOp

40− , dropFunction

41− , dropFunctionIfExists

42− , dropOperator

43− , dropOperatorIfExists

44− , FunctionDefinition(..)

45− , languageSqlExpr

46− , languageSqlQuery

47− ) where

48−

49−import Control.DeepSeq

50−import Data.ByteString

51−import GHC.TypeLits

52−

53−import qualified Generics.SOP as SOP

54−import qualified GHC.Generics as GHC

55−

56−import Squeal.PostgreSQL.Alias

57−import Squeal.PostgreSQL.Definition

58−import Squeal.PostgreSQL.Expression

59−import Squeal.PostgreSQL.Expression.Type

60−import Squeal.PostgreSQL.List

61−import Squeal.PostgreSQL.Query

62−import Squeal.PostgreSQL.Render

63−import Squeal.PostgreSQL.Schema

64−

65−-- $setup

66−-- >>> import Squeal.PostgreSQL

67−

68−createFunction

69− :: ( Has sch schemas schema

70− , KnownSymbol fun

71− , SOP.SListI args )

72− => QualifiedAlias sch fun

73− -> NP (TypeExpression schemas) args

74− -> TypeExpression schemas ret

75− -> FunctionDefinition schemas args ('Returns ret)

76− -> Definition schemas (Alter sch (Create fun ('Function (args :=> 'Returns ret)) schema) schemas)

77−createFunction fun args ret fundef = UnsafeDefinition $

78− "CREATE" <+> "FUNCTION" <+> renderSQL fun

79− <+> parenthesized (renderCommaSeparated renderSQL args)

80− <+> "RETURNS" <+> renderSQL ret <+> renderSQL fundef <> ";"

81−

82−createOrReplaceFunction

83− :: ( Has sch schemas schema

84− , KnownSymbol fun

85− , SOP.SListI args )

86− => QualifiedAlias sch fun

87− -> NP (TypeExpression schemas) args

88− -> TypeExpression schemas ret

89− -> FunctionDefinition schemas args ('Returns ret)

90− -> Definition schemas (Alter sch (CreateOrReplace fun ('Function (args :=> 'Returns ret)) schema) schemas)

91−createOrReplaceFunction fun args ret fundef = UnsafeDefinition $

92− "CREATE" <+> "OR" <+> "REPLACE" <+> "FUNCTION" <+> renderSQL fun

93− <+> parenthesized (renderCommaSeparated renderSQL args)

94− <+> "RETURNS" <+> renderSQL ret <+> renderSQL fundef <> ";"

95−

96−languageSqlExpr

97− :: Expression '[] '[] 'Ungrouped schemas args '[] ret

98− -> FunctionDefinition schemas args ('Returns ret)

99−languageSqlExpr expr = UnsafeFunctionDefinition $

100− "language sql as"

101− <+> "$$" <+> renderSQL (values_ (expr `as` #ret)) <+> "$$"

102−

103−languageSqlQuery

104− :: Query '[] '[] schemas args rets

105− -> FunctionDefinition schemas args ('ReturnsTable rets)

106−languageSqlQuery qry = UnsafeFunctionDefinition $

107− "language sql as" <+> "$$" <+> renderSQL qry <+> "$$"

108−

109−createSetFunction

110− :: ( Has sch schemas schema

111− , KnownSymbol fun

112− , SOP.SListI args

113− , SOP.SListI rets )

114− => QualifiedAlias sch fun

115− -> NP (TypeExpression schemas) args

116− -> NP (Aliased (TypeExpression schemas)) rets

117− -> FunctionDefinition schemas args ('ReturnsTable rets)

118− -> Definition schemas (Alter sch (Create fun ('Function (args :=> 'ReturnsTable rets)) schema) schemas)

119−createSetFunction fun args rets fundef = UnsafeDefinition $

120− "CREATE" <+> "FUNCTION" <+> renderSQL fun

121− <+> parenthesized (renderCommaSeparated renderSQL args)

122− <+> "RETURNS" <+> "TABLE"

123− <+> parenthesized (renderCommaSeparated renderRet rets)

124− <+> renderSQL fundef <> ";"

125− where

126− renderRet :: Aliased (TypeExpression s) r -> ByteString

127− renderRet (ty `As` col) = renderSQL col <+> renderSQL ty

128−

129−createOrReplaceSetFunction

130− :: ( Has sch schemas schema

131− , KnownSymbol fun

132− , SOP.SListI args

133− , SOP.SListI rets )

134− => QualifiedAlias sch fun

135− -> NP (TypeExpression schemas) args

136− -> NP (Aliased (TypeExpression schemas)) rets

137− -> FunctionDefinition schemas args ('ReturnsTable rets)

138− -> Definition schemas (Alter sch (CreateOrReplace fun ('Function (args :=> 'ReturnsTable rets)) schema) schemas)

139−createOrReplaceSetFunction fun args rets fundef = UnsafeDefinition $

140− "CREATE" <+> "OR" <+> "REPLACE" <+> "FUNCTION" <+> renderSQL fun

141− <+> parenthesized (renderCommaSeparated renderSQL args)

142− <+> "RETURNS" <+> "TABLE"

143− <+> parenthesized (renderCommaSeparated renderRet rets)

144− <+> renderSQL fundef <> ";"

145− where

146− renderRet :: Aliased (TypeExpression s) r -> ByteString

147− renderRet (ty `As` col) = renderSQL col <+> renderSQL ty

148−

149−createBinaryOp

150− :: forall op fun sch schemas schema x y z.

151− ( Has sch schemas schema

152− , Has fun schema ('Function ('[x,y] :=> 'Returns z))

153− , KnownSymbol op )

154− => QualifiedAlias sch fun

155− -> TypeExpression schemas x

156− -> TypeExpression schemas y

157− -> Definition schemas

158− (Alter sch (Create op ('Operator ('BinaryOp x y z)) schema) schemas)

159−createBinaryOp fun x y = UnsafeDefinition $

160− "CREATE" <+> "OPERATOR" <+> renderSymbol @op

161− <+> parenthesized (commaSeparated opdef)

162− where

163− opdef =

164− [ "FUNCTION" <+> "=" <+> renderSQL fun

165− , "LEFTARG" <+> "=" <+> renderSQL x

166− , "RIGHTARG" <+> "=" <+> renderSQL y ]

167−

168−createLeftOp

169− :: forall op fun sch schemas schema x y.

170− ( Has sch schemas schema

171− , Has fun schema ('Function ('[x] :=> 'Returns y))

172− , KnownSymbol op )

173− => QualifiedAlias sch fun

174− -> TypeExpression schemas x

175− -> Definition schemas

176− (Alter sch (Create op ('Operator ('LeftOp x y)) schema) schemas)

177−createLeftOp fun x = UnsafeDefinition $

178− "CREATE" <+> "OPERATOR" <+> renderSymbol @op

179− <+> parenthesized (commaSeparated opdef)

180− where

181− opdef =

182− [ "FUNCTION" <+> "=" <+> renderSQL fun

183− , "RIGHTARG" <+> "=" <+> renderSQL x ]

184−

185−createRightOp

186− :: forall op fun sch schemas schema x y.

187− ( Has sch schemas schema

188− , Has fun schema ('Function ('[x] :=> 'Returns y))

189− , KnownSymbol op )

190− => QualifiedAlias sch fun

191− -> TypeExpression schemas x

192− -> Definition schemas

193− (Alter sch (Create op ('Operator ('RightOp x y)) schema) schemas)

194−createRightOp fun x = UnsafeDefinition $

195− "CREATE" <+> "OPERATOR" <+> renderSymbol @op

196− <+> parenthesized (commaSeparated opdef)

197− where

198− opdef =

199− [ "FUNCTION" <+> "=" <+> renderSQL fun

200− , "LEFTARG" <+> "=" <+> renderSQL x ]

201−

202−dropFunction

203− :: (Has sch schemas schema, KnownSymbol fun)

204− => QualifiedAlias sch fun

205− -- ^ name of the user defined function

206− -> Definition schemas (Alter sch (DropSchemum fun 'Function schema) schemas)

207−dropFunction fun = UnsafeDefinition $

208− "DROP" <+> "FUNCTION" <+> renderSQL fun <> ";"

209−

210−dropFunctionIfExists

211− :: (Has sch schemas schema, KnownSymbol fun)

212− => QualifiedAlias sch fun

213− -- ^ name of the user defined function

214− -> Definition schemas (Alter sch (DropSchemumIfExists fun 'Function schema) schemas)

215−dropFunctionIfExists fun = UnsafeDefinition $

216− "DROP FUNCTION IF EXISTS" <+> renderSQL fun <> ";"

217−

218−dropOperator

219− :: (Has sch schemas schema, KnownSymbol op)

220− => QualifiedAlias sch op

221− -- ^ name of the user defined operator

222− -> Definition schemas (Alter sch (DropSchemum op 'Operator schema) schemas)

223−dropOperator op = UnsafeDefinition $

224− "DROP" <+> "OPERATOR" <+> renderSQL op <> ";"

225−

226−dropOperatorIfExists

227− :: (Has sch schemas schema, KnownSymbol op)

228− => QualifiedAlias sch op

229− -- ^ name of the user defined operator

230− -> Definition schemas (Alter sch (DropSchemumIfExists op 'Operator schema) schemas)

231−dropOperatorIfExists op = UnsafeDefinition $

232− "DROP OPERATOR IF EXISTS" <+> renderSQL op <> ";"

233−

234−newtype FunctionDefinition schemas args ret = UnsafeFunctionDefinition

235− { renderFunctionDefinition :: ByteString }

236− deriving (Eq,Show,GHC.Generic,NFData)

237−instance RenderSQL (FunctionDefinition schemas args ret) where

238− renderSQL = renderFunctionDefinition

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Index.hsdeleted−159

@@ -1,159 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Index

3−Description: Create and drop index definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create and drop index definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Index

33− ( createIndex

34− , createIndexIfNotExists

35− , dropIndex

36− , dropIndexIfExists

37− , IndexMethod (..)

38− , btree

39− , hash

40− , gist

41− , spgist

42− , gin

43− , brin

44− ) where

45−

46−import Data.ByteString

47−import GHC.TypeLits

48−

49−import qualified GHC.Generics as GHC

50−

51−import Squeal.PostgreSQL.Alias

52−import Squeal.PostgreSQL.Definition

53−import Squeal.PostgreSQL.Expression.Sort

54−import Squeal.PostgreSQL.Render

55−import Squeal.PostgreSQL.Schema

56−

57−-- $setup

58−-- >>> import Squeal.PostgreSQL

59−

60−{- |

61−>>> :{

62−type Table = '[] :=>

63− '[ "a" ::: 'NoDef :=> 'Null 'PGint4

64− , "b" ::: 'NoDef :=> 'Null 'PGfloat4 ]

65−:}

66−

67−>>> :{

68−let

69− setup :: Definition (Public '[]) (Public '["tab" ::: 'Table Table, "ix" ::: 'Index 'Btree])

70− setup =

71− createTable #tab (nullable int `as` #a :* nullable real `as` #b) Nil >>>

72− createIndex #ix #tab btree [#a & AscNullsFirst, #b & AscNullsLast]

73−in printSQL setup

74−:}

75−CREATE TABLE "tab" ("a" int NULL, "b" real NULL);

76−CREATE INDEX "ix" ON "tab" USING btree (("a") ASC NULLS FIRST, ("b") ASC NULLS LAST);

77−-}

78−createIndex

79− :: (Has sch schemas schema, Has tab schema ('Table table), KnownSymbol ix)

80− => Alias ix

81− -> QualifiedAlias sch tab

82− -> IndexMethod method

83− -> [SortExpression '[] '[] 'Ungrouped schemas '[] '[tab ::: TableToRow table]]

84− -> Definition schemas (Alter sch (Create ix ('Index method) schema) schemas)

85−createIndex ix tab method cols = UnsafeDefinition $

86− "CREATE" <+> "INDEX" <+> renderSQL ix <+> "ON" <+> renderSQL tab

87− <+> "USING" <+> renderSQL method

88− <+> parenthesized (commaSeparated (renderIndex <$> cols))

89− <> ";"

90− where

91− renderIndex = \case

92− Asc expression -> parenthesized (renderSQL expression) <+> "ASC"

93− Desc expression -> parenthesized (renderSQL expression) <+> "DESC"

94− AscNullsFirst expression -> parenthesized (renderSQL expression)

95− <+> "ASC NULLS FIRST"

96− DescNullsFirst expression -> parenthesized (renderSQL expression)

97− <+> "DESC NULLS FIRST"

98− AscNullsLast expression -> parenthesized (renderSQL expression)

99− <+> "ASC NULLS LAST"

100− DescNullsLast expression -> parenthesized (renderSQL expression)

101− <+> "DESC NULLS LAST"

102−

103−createIndexIfNotExists

104− :: (Has sch schemas schema, Has tab schema ('Table table), KnownSymbol ix)

105− => Alias ix

106− -> QualifiedAlias sch tab

107− -> IndexMethod method

108− -> [SortExpression '[] '[] 'Ungrouped schemas '[] '[tab ::: TableToRow table]]

109− -> Definition schemas (Alter sch (CreateIfNotExists ix ('Index method) schema) schemas)

110−createIndexIfNotExists ix tab method cols = UnsafeDefinition $

111− "CREATE INDEX IF NOT EXISTS" <+> renderSQL ix <+> "ON" <+> renderSQL tab

112− <+> "USING" <+> renderSQL method

113− <+> parenthesized (commaSeparated (renderIndex <$> cols))

114− <> ";"

115− where

116− renderIndex = \case

117− Asc expression -> parenthesized (renderSQL expression) <+> "ASC"

118− Desc expression -> parenthesized (renderSQL expression) <+> "DESC"

119− AscNullsFirst expression -> parenthesized (renderSQL expression)

120− <+> "ASC NULLS FIRST"

121− DescNullsFirst expression -> parenthesized (renderSQL expression)

122− <+> "DESC NULLS FIRST"

123− AscNullsLast expression -> parenthesized (renderSQL expression)

124− <+> "ASC NULLS LAST"

125− DescNullsLast expression -> parenthesized (renderSQL expression)

126− <+> "DESC NULLS LAST"

127−

128−newtype IndexMethod ty = UnsafeIndexMethod {renderIndexMethod :: ByteString}

129− deriving stock (Eq, Ord, Show, GHC.Generic)

130−instance RenderSQL (IndexMethod ty) where renderSQL = renderIndexMethod

131−btree :: IndexMethod 'Btree

132−btree = UnsafeIndexMethod "btree"

133−hash :: IndexMethod 'Hash

134−hash = UnsafeIndexMethod "hash"

135−gist :: IndexMethod 'Gist

136−gist = UnsafeIndexMethod "gist"

137−spgist :: IndexMethod 'Spgist

138−spgist = UnsafeIndexMethod "spgist"

139−gin :: IndexMethod 'Gin

140−gin = UnsafeIndexMethod "gin"

141−brin :: IndexMethod 'Brin

142−brin = UnsafeIndexMethod "brin"

143−

144−-- |

145−-- >>> printSQL (dropIndex #ix :: Definition (Public '["ix" ::: 'Index 'Btree]) (Public '[]))

146−-- DROP INDEX "ix";

147−dropIndex

148− :: (Has sch schemas schema, KnownSymbol ix)

149− => QualifiedAlias sch ix

150− -- ^ name of the user defined index

151− -> Definition schemas (Alter sch (DropSchemum ix 'Index schema) schemas)

152−dropIndex ix = UnsafeDefinition $ "DROP" <+> "INDEX" <+> renderSQL ix <> ";"

153−

154−dropIndexIfExists

155− :: (Has sch schemas schema, KnownSymbol ix)

156− => QualifiedAlias sch ix

157− -- ^ name of the user defined index

158− -> Definition schemas (Alter sch (DropSchemumIfExists ix 'Index schema) schemas)

159−dropIndexIfExists ix = UnsafeDefinition $ "DROP INDEX IF EXISTS" <+> renderSQL ix <> ";"

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Schema.hsdeleted−96

@@ -1,96 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Schema

3−Description: Create and drop schema definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create and drop schema definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Schema

33− ( createSchema

34− , createSchemaIfNotExists

35− , dropSchema

36− , dropSchemaIfExists

37− ) where

38−

39−import GHC.TypeLits

40−

41−import Squeal.PostgreSQL.Alias

42−import Squeal.PostgreSQL.Definition

43−import Squeal.PostgreSQL.Render

44−import Squeal.PostgreSQL.Schema

45−

46−-- $setup

47−-- >>> import Squeal.PostgreSQL

48−

49−{- |

50−`createSchema` enters a new schema into the current database.

51−The schema name must be distinct from the name of any existing schema

52−in the current database.

53−

54−A schema is essentially a namespace: it contains named objects

55−(tables, data types, functions, and operators) whose names

56−can duplicate those of other objects existing in other schemas.

57−Named objects are accessed by `QualifiedAlias`es with the schema

58−name as a prefix.

59−-}

60−createSchema

61− :: KnownSymbol sch

62− => Alias sch

63− -> Definition schemas (Create sch '[] schemas)

64−createSchema sch = UnsafeDefinition $

65− "CREATE" <+> "SCHEMA" <+> renderSQL sch <> ";"

66−

67−{- | Idempotent version of `createSchema`. -}

68−createSchemaIfNotExists

69− :: (KnownSymbol sch, Has sch schemas schema)

70− => Alias sch

71− -> Definition schemas (CreateIfNotExists sch '[] schemas)

72−createSchemaIfNotExists sch = UnsafeDefinition $

73− "CREATE" <+> "SCHEMA" <+> "IF" <+> "NOT" <+> "EXISTS"

74− <+> renderSQL sch <> ";"

75−

76−-- | >>> :{

77−-- let

78−-- definition :: Definition '["muh_schema" ::: schema, "public" ::: public] '["public" ::: public]

79−-- definition = dropSchema #muh_schema

80−-- :}

81−--

82−-- >>> printSQL definition

83−-- DROP SCHEMA "muh_schema";

84−dropSchema

85− :: KnownSymbol sch

86− => Alias sch

87− -- ^ user defined schema

88− -> Definition schemas (Drop sch schemas)

89−dropSchema sch = UnsafeDefinition $ "DROP SCHEMA" <+> renderSQL sch <> ";"

90−

91−dropSchemaIfExists

92− :: KnownSymbol sch

93− => Alias sch

94− -- ^ user defined schema

95− -> Definition schemas (DropIfExists sch schemas)

96−dropSchemaIfExists sch = UnsafeDefinition $ "DROP SCHEMA" <+> renderSQL sch <> ";"

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Table.hsdeleted−500

@@ -1,500 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Table

3−Description: Create, drop and alter table definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create, drop and alter table definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Table

33− ( createTable

34− , createTableIfNotExists

35− , dropTable

36− , dropTableIfExists

37− , alterTable

38− , alterTableIfExists

39− , alterTableRename

40− , alterTableIfExistsRename

41− , AlterTable (..)

42− , addConstraint

43− , dropConstraint

44− , AddColumn (..)

45− , dropColumn

46− , renameColumn

47− , alterColumn

48− , AlterColumn (..)

49− , setDefault

50− , dropDefault

51− , setNotNull

52− , dropNotNull

53− , alterType

54− ) where

55−

56−import Control.DeepSeq

57−import Data.ByteString

58−import GHC.TypeLits

59−

60−import qualified Generics.SOP as SOP

61−import qualified GHC.Generics as GHC

62−

63−import Squeal.PostgreSQL.Alias

64−import Squeal.PostgreSQL.Definition

65−import Squeal.PostgreSQL.Definition.Table.Constraint

66−import Squeal.PostgreSQL.Expression

67−import Squeal.PostgreSQL.Expression.Type

68−import Squeal.PostgreSQL.List

69−import Squeal.PostgreSQL.Render

70−import Squeal.PostgreSQL.Schema

71−

72−-- $setup

73−-- >>> import Squeal.PostgreSQL

74−

75−{- | `createTable` adds a table to the schema.

76−

77−>>> :set -XOverloadedLabels

78−>>> :{

79−type Table = '[] :=>

80− '[ "a" ::: 'NoDef :=> 'Null 'PGint4

81− , "b" ::: 'NoDef :=> 'Null 'PGfloat4 ]

82−:}

83−

84−>>> :{

85−let

86− setup :: Definition (Public '[]) (Public '["tab" ::: 'Table Table])

87− setup = createTable #tab

88− (nullable int `as` #a :* nullable real `as` #b) Nil

89−in printSQL setup

90−:}

91−CREATE TABLE "tab" ("a" int NULL, "b" real NULL);

92−-}

93−createTable

94− :: ( KnownSymbol sch

95− , KnownSymbol tab

96− , columns ~ (col ': cols)

97− , SOP.SListI columns

98− , SOP.SListI constraints

99− , Has sch schemas0 schema0

100− , schemas1 ~ Alter sch (Create tab ('Table (constraints :=> columns)) schema0) schemas0 )

101− => QualifiedAlias sch tab -- ^ the name of the table to add

102− -> NP (Aliased (ColumnTypeExpression schemas0)) columns

103− -- ^ the names and datatype of each column

104− -> NP (Aliased (TableConstraintExpression sch tab schemas1)) constraints

105− -- ^ constraints that must hold for the table

106− -> Definition schemas0 schemas1

107−createTable tab columns constraints = UnsafeDefinition $

108− "CREATE TABLE" <+> renderCreation tab columns constraints

109−

110−{-| `createTableIfNotExists` creates a table if it doesn't exist, but does not add it to the schema.

111−Instead, the schema already has the table so if the table did not yet exist, the schema was wrong.

112−`createTableIfNotExists` fixes this. Interestingly, this property makes it an idempotent in

113−the `Category` of `Definition`s.

114−

115−>>> :set -XOverloadedLabels -XTypeApplications

116−>>> :{

117−type Table = '[] :=>

118− '[ "a" ::: 'NoDef :=> 'Null 'PGint4

119− , "b" ::: 'NoDef :=> 'Null 'PGfloat4 ]

120−:}

121−

122−>>> type Schemas = Public '["tab" ::: 'Table Table]

123−

124−>>> :{

125−let

126− setup :: Definition Schemas Schemas

127− setup = createTableIfNotExists #tab

128− (nullable int `as` #a :* nullable real `as` #b) Nil

129−in printSQL setup

130−:}

131−CREATE TABLE IF NOT EXISTS "tab" ("a" int NULL, "b" real NULL);

132−-}

133−createTableIfNotExists

134− :: ( KnownSymbol sch

135− , KnownSymbol tab

136− , columns ~ (col ': cols)

137− , SOP.SListI columns

138− , SOP.SListI constraints

139− , Has sch schemas0 schema0

140− , schemas1 ~ Alter sch (CreateIfNotExists tab ('Table (constraints :=> columns)) schema0) schemas0 )

141− => QualifiedAlias sch tab -- ^ the name of the table to add

142− -> NP (Aliased (ColumnTypeExpression schemas0)) columns

143− -- ^ the names and datatype of each column

144− -> NP (Aliased (TableConstraintExpression sch tab schemas1)) constraints

145− -- ^ constraints that must hold for the table

146− -> Definition schemas0 schemas1

147−createTableIfNotExists tab columns constraints = UnsafeDefinition $

148− "CREATE TABLE IF NOT EXISTS"

149− <+> renderCreation tab columns constraints

150−

151−-- helper function for `createTable` and `createTableIfNotExists`

152−renderCreation

153− :: ( KnownSymbol sch

154− , KnownSymbol tab

155− , SOP.SListI columns

156− , SOP.SListI constraints )

157− => QualifiedAlias sch tab -- ^ the name of the table to add

158− -> NP (Aliased (ColumnTypeExpression schemas0)) columns

159− -- ^ the names and datatype of each column

160− -> NP (Aliased (TableConstraintExpression sch tab schemas1)) constraints

161− -- ^ constraints that must hold for the table

162− -> ByteString

163−renderCreation tab columns constraints = renderSQL tab

164− <+> parenthesized

165− ( renderCommaSeparated renderColumnDef columns

166− <> ( case constraints of

167− Nil -> ""

168− _ -> ", " <>

169− renderCommaSeparated renderConstraint constraints ) )

170− <> ";"

171− where

172− renderColumnDef :: Aliased (ColumnTypeExpression schemas) x -> ByteString

173− renderColumnDef (ty `As` column) =

174− renderSQL column <+> renderColumnTypeExpression ty

175− renderConstraint

176− :: Aliased (TableConstraintExpression sch tab schemas) constraint

177− -> ByteString

178− renderConstraint (constraint `As` alias) =

179− "CONSTRAINT" <+> renderSQL alias <+> renderSQL constraint

180−

181−-- | `dropTable` removes a table from the schema.

182−--

183−-- >>> :{

184−-- let

185−-- definition :: Definition '["public" ::: '["muh_table" ::: 'Table t]] (Public '[])

186−-- definition = dropTable #muh_table

187−-- :}

188−--

189−-- >>> printSQL definition

190−-- DROP TABLE "muh_table";

191−dropTable

192− :: ( Has sch schemas schema

193− , KnownSymbol tab )

194− => QualifiedAlias sch tab -- ^ table to remove

195− -> Definition schemas (Alter sch (DropSchemum tab 'Table schema) schemas)

196−dropTable tab = UnsafeDefinition $ "DROP TABLE" <+> renderSQL tab <> ";"

197−

198−dropTableIfExists

199− :: ( Has sch schemas schema

200− , KnownSymbol tab)

201− => QualifiedAlias sch tab -- ^ table to remove

202− -> Definition schemas (Alter sch (DropSchemumIfExists tab 'Table schema) schemas)

203−dropTableIfExists tab = UnsafeDefinition $ "DROP TABLE IF EXISTS" <+> renderSQL tab <> ";"

204−

205−-- | `alterTable` changes the definition of a table from the schema.

206−alterTable

207− :: (Has sch schemas schema, KnownSymbol tab)

208− => QualifiedAlias sch tab -- ^ table to alter

209− -> AlterTable sch tab schemas table -- ^ alteration to perform

210− -> Definition schemas (Alter sch (Alter tab ('Table table) schema) schemas)

211−alterTable tab alteration = UnsafeDefinition $

212− "ALTER TABLE"

213− <+> renderSQL tab

214− <+> renderAlterTable alteration

215− <> ";"

216−

217−-- | `alterTable` changes the definition of a table from the schema.

218−alterTableIfExists

219− :: (Has sch schemas schema, KnownSymbol tab)

220− => QualifiedAlias sch tab -- ^ table to alter

221− -> AlterTable sch tab schemas table -- ^ alteration to perform

222− -> Definition schemas (Alter sch (AlterIfExists tab ('Table table) schema) schemas)

223−alterTableIfExists tab alteration = UnsafeDefinition $

224− "ALTER TABLE IF EXISTS"

225− <+> renderSQL tab

226− <+> renderAlterTable alteration

227− <> ";"

228−

229−-- | `alterTableRename` changes the name of a table from the schema.

230−--

231−-- >>> printSQL $ alterTableRename #foo #bar

232−-- ALTER TABLE "foo" RENAME TO "bar";

233−alterTableRename

234− :: (KnownSymbol tab0, KnownSymbol tab1)

235− => Alias tab0 -- ^ table to rename

236− -> Alias tab1 -- ^ what to rename it

237− -> Definition schema (Rename tab0 tab1 schema)

238−alterTableRename tab0 tab1 = UnsafeDefinition $

239− "ALTER TABLE" <+> renderSQL tab0

240− <+> "RENAME TO" <+> renderSQL tab1 <> ";"

241−

242−alterTableIfExistsRename

243− :: (KnownSymbol tab0, KnownSymbol tab1)

244− => Alias tab0 -- ^ table to rename

245− -> Alias tab1 -- ^ what to rename it

246− -> Definition schema (RenameIfExists tab0 tab1 schema)

247−alterTableIfExistsRename tab0 tab1 = UnsafeDefinition $

248− "ALTER TABLE IF EXISTS" <+> renderSQL tab0

249− <+> "RENAME TO" <+> renderSQL tab1 <> ";"

250−

251−-- | An `AlterTable` describes the alteration to perform on the columns

252−-- of a table.

253−newtype AlterTable

254− (sch :: Symbol)

255− (tab :: Symbol)

256− (schemas :: SchemasType)

257− (table :: TableType) =

258− UnsafeAlterTable {renderAlterTable :: ByteString}

259− deriving (GHC.Generic,Show,Eq,Ord,NFData)

260−

261−-- | An `addConstraint` adds a table constraint.

262−--

263−-- >>> :{

264−-- let

265−-- definition :: Definition

266−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

267−-- '["public" ::: '["tab" ::: 'Table ('["positive" ::: 'Check '["col"]] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

268−-- definition = alterTable #tab (addConstraint #positive (check #col (#col .> 0)))

269−-- in printSQL definition

270−-- :}

271−-- ALTER TABLE "tab" ADD CONSTRAINT "positive" CHECK (("col" > 0));

272−addConstraint

273− :: ( KnownSymbol alias

274− , Has sch schemas schema

275− , Has tab schema ('Table table0)

276− , table0 ~ (constraints :=> columns)

277− , table1 ~ (Create alias constraint constraints :=> columns) )

278− => Alias alias

279− -> TableConstraintExpression sch tab schemas constraint

280− -- ^ constraint to add

281− -> AlterTable sch tab schemas table1

282−addConstraint alias constraint = UnsafeAlterTable $

283− "ADD" <+> "CONSTRAINT" <+> renderSQL alias

284− <+> renderSQL constraint

285−

286−-- | A `dropConstraint` drops a table constraint.

287−--

288−-- >>> :{

289−-- let

290−-- definition :: Definition

291−-- '["public" ::: '["tab" ::: 'Table ('["positive" ::: Check '["col"]] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

292−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

293−-- definition = alterTable #tab (dropConstraint #positive)

294−-- in printSQL definition

295−-- :}

296−-- ALTER TABLE "tab" DROP CONSTRAINT "positive";

297−dropConstraint

298− :: ( KnownSymbol constraint

299− , Has sch schemas schema

300− , Has tab schema ('Table table0)

301− , table0 ~ (constraints :=> columns)

302− , table1 ~ (Drop constraint constraints :=> columns) )

303− => Alias constraint

304− -- ^ constraint to drop

305− -> AlterTable sch tab schemas table1

306−dropConstraint constraint = UnsafeAlterTable $

307− "DROP" <+> "CONSTRAINT" <+> renderSQL constraint

308−

309−-- | An `AddColumn` is either @NULL@ or has @DEFAULT@.

310−class AddColumn ty where

311− -- | `addColumn` adds a new column, initially filled with whatever

312− -- default value is given or with @NULL@.

313− --

314− -- >>> :{

315− -- let

316− -- definition :: Definition

317− -- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

318− -- '["public" ::: '["tab" ::: 'Table ('[] :=>

319− -- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

320− -- , "col2" ::: 'Def :=> 'Null 'PGtext ])]]

321− -- definition = alterTable #tab (addColumn #col2 (text & nullable & default_ "foo"))

322− -- in printSQL definition

323− -- :}

324− -- ALTER TABLE "tab" ADD COLUMN "col2" text NULL DEFAULT E'foo';

325− --

326− -- >>> :{

327− -- let

328− -- definition :: Definition

329− -- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

330− -- '["public" ::: '["tab" ::: 'Table ('[] :=>

331− -- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

332− -- , "col2" ::: 'NoDef :=> 'Null 'PGtext ])]]

333− -- definition = alterTable #tab (addColumn #col2 (text & nullable))

334− -- in printSQL definition

335− -- :}

336− -- ALTER TABLE "tab" ADD COLUMN "col2" text NULL;

337− addColumn

338− :: ( KnownSymbol column

339− , Has sch schemas schema

340− , Has tab schema ('Table table0)

341− , table0 ~ (constraints :=> columns) )

342− => Alias column -- ^ column to add

343− -> ColumnTypeExpression schemas ty -- ^ type of the new column

344− -> AlterTable sch tab schemas (constraints :=> Create column ty columns)

345− addColumn column ty = UnsafeAlterTable $

346− "ADD COLUMN" <+> renderSQL column <+> renderColumnTypeExpression ty

347−instance {-# OVERLAPPING #-} AddColumn ('Def :=> ty)

348−instance {-# OVERLAPPABLE #-} AddColumn ('NoDef :=> 'Null ty)

349−

350−-- | A `dropColumn` removes a column. Whatever data was in the column

351−-- disappears. Table constraints involving the column are dropped, too.

352−-- However, if the column is referenced by a foreign key constraint of

353−-- another table, PostgreSQL will not silently drop that constraint.

354−--

355−-- >>> :{

356−-- let

357−-- definition :: Definition

358−-- '["public" ::: '["tab" ::: 'Table ('[] :=>

359−-- '[ "col1" ::: 'NoDef :=> 'Null 'PGint4

360−-- , "col2" ::: 'NoDef :=> 'Null 'PGtext ])]]

361−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col1" ::: 'NoDef :=> 'Null 'PGint4])]]

362−-- definition = alterTable #tab (dropColumn #col2)

363−-- in printSQL definition

364−-- :}

365−-- ALTER TABLE "tab" DROP COLUMN "col2";

366−dropColumn

367− :: ( KnownSymbol column

368− , Has sch schemas schema

369− , Has tab schema ('Table table0)

370− , table0 ~ (constraints :=> columns)

371− , table1 ~ (constraints :=> Drop column columns) )

372− => Alias column -- ^ column to remove

373− -> AlterTable sch tab schemas table1

374−dropColumn column = UnsafeAlterTable $

375− "DROP COLUMN" <+> renderSQL column

376−

377−-- | A `renameColumn` renames a column.

378−--

379−-- >>> :{

380−-- let

381−-- definition :: Definition

382−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["foo" ::: 'NoDef :=> 'Null 'PGint4])]]

383−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["bar" ::: 'NoDef :=> 'Null 'PGint4])]]

384−-- definition = alterTable #tab (renameColumn #foo #bar)

385−-- in printSQL definition

386−-- :}

387−-- ALTER TABLE "tab" RENAME COLUMN "foo" TO "bar";

388−renameColumn

389− :: ( KnownSymbol column0

390− , KnownSymbol column1

391− , Has sch schemas schema

392− , Has tab schema ('Table table0)

393− , table0 ~ (constraints :=> columns)

394− , table1 ~ (constraints :=> Rename column0 column1 columns) )

395− => Alias column0 -- ^ column to rename

396− -> Alias column1 -- ^ what to rename the column

397− -> AlterTable sch tab schemas table1

398−renameColumn column0 column1 = UnsafeAlterTable $

399− "RENAME COLUMN" <+> renderSQL column0 <+> "TO" <+> renderSQL column1

400−

401−-- | An `alterColumn` alters a single column.

402−alterColumn

403− :: ( KnownSymbol column

404− , Has sch schemas schema

405− , Has tab schema ('Table table0)

406− , table0 ~ (constraints :=> columns)

407− , Has column columns ty0

408− , table1 ~ (constraints :=> Alter column ty1 columns))

409− => Alias column -- ^ column to alter

410− -> AlterColumn schemas ty0 ty1 -- ^ alteration to perform

411− -> AlterTable sch tab schemas table1

412−alterColumn column alteration = UnsafeAlterTable $

413− "ALTER COLUMN" <+> renderSQL column <+> renderAlterColumn alteration

414−

415−-- | An `AlterColumn` describes the alteration to perform on a single column.

416−newtype AlterColumn (schemas :: SchemasType) (ty0 :: ColumnType) (ty1 :: ColumnType) =

417− UnsafeAlterColumn {renderAlterColumn :: ByteString}

418− deriving (GHC.Generic,Show,Eq,Ord,NFData)

419−

420−-- | A `setDefault` sets a new default for a column. Note that this doesn't

421−-- affect any existing rows in the table, it just changes the default for

422−-- future insert and update commands.

423−--

424−-- >>> :{

425−-- let

426−-- definition :: Definition

427−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

428−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'Def :=> 'Null 'PGint4])]]

429−-- definition = alterTable #tab (alterColumn #col (setDefault 5))

430−-- in printSQL definition

431−-- :}

432−-- ALTER TABLE "tab" ALTER COLUMN "col" SET DEFAULT 5;

433−setDefault

434− :: Expression '[] '[] 'Ungrouped schemas '[] '[] ty -- ^ default value to set

435− -> AlterColumn schemas (constraint :=> ty) ('Def :=> ty)

436−setDefault expression = UnsafeAlterColumn $

437− "SET DEFAULT" <+> renderExpression expression

438−

439−-- | A `dropDefault` removes any default value for a column.

440−--

441−-- >>> :{

442−-- let

443−-- definition :: Definition

444−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'Def :=> 'Null 'PGint4])]]

445−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

446−-- definition = alterTable #tab (alterColumn #col dropDefault)

447−-- in printSQL definition

448−-- :}

449−-- ALTER TABLE "tab" ALTER COLUMN "col" DROP DEFAULT;

450−dropDefault :: AlterColumn schemas ('Def :=> ty) ('NoDef :=> ty)

451−dropDefault = UnsafeAlterColumn $ "DROP DEFAULT"

452−

453−-- | A `setNotNull` adds a @NOT NULL@ constraint to a column.

454−-- The constraint will be checked immediately, so the table data must satisfy

455−-- the constraint before it can be added.

456−--

457−-- >>> :{

458−-- let

459−-- definition :: Definition

460−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

461−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

462−-- definition = alterTable #tab (alterColumn #col setNotNull)

463−-- in printSQL definition

464−-- :}

465−-- ALTER TABLE "tab" ALTER COLUMN "col" SET NOT NULL;

466−setNotNull

467− :: AlterColumn schemas (constraint :=> 'Null ty) (constraint :=> 'NotNull ty)

468−setNotNull = UnsafeAlterColumn $ "SET NOT NULL"

469−

470−-- | A `dropNotNull` drops a @NOT NULL@ constraint from a column.

471−--

472−-- >>> :{

473−-- let

474−-- definition :: Definition

475−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

476−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'Null 'PGint4])]]

477−-- definition = alterTable #tab (alterColumn #col dropNotNull)

478−-- in printSQL definition

479−-- :}

480−-- ALTER TABLE "tab" ALTER COLUMN "col" DROP NOT NULL;

481−dropNotNull

482− :: AlterColumn schemas (constraint :=> 'NotNull ty) (constraint :=> 'Null ty)

483−dropNotNull = UnsafeAlterColumn $ "DROP NOT NULL"

484−

485−-- | An `alterType` converts a column to a different data type.

486−-- This will succeed only if each existing entry in the column can be

487−-- converted to the new type by an implicit cast.

488−--

489−-- >>> :{

490−-- let

491−-- definition :: Definition

492−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGint4])]]

493−-- '["public" ::: '["tab" ::: 'Table ('[] :=> '["col" ::: 'NoDef :=> 'NotNull 'PGnumeric])]]

494−-- definition =

495−-- alterTable #tab (alterColumn #col (alterType (numeric & notNullable)))

496−-- in printSQL definition

497−-- :}

498−-- ALTER TABLE "tab" ALTER COLUMN "col" TYPE numeric NOT NULL;

499−alterType :: ColumnTypeExpression schemas ty -> AlterColumn schemas ty0 ty

500−alterType ty = UnsafeAlterColumn $ "TYPE" <+> renderColumnTypeExpression ty

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Table/Constraint.hsdeleted−339

@@ -1,339 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Table.Constraint

3−Description: Table constraint expressions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Table constraint expressions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Table.Constraint

33− ( TableConstraintExpression (..)

34− , check

35− , unique

36− , primaryKey

37− , foreignKey

38− , ForeignKeyed

39− , OnDeleteClause (..)

40− , OnUpdateClause (..)

41− ) where

42−

43−import Control.DeepSeq

44−import Data.ByteString

45−import GHC.TypeLits

46−

47−import qualified Generics.SOP as SOP

48−import qualified GHC.Generics as GHC

49−

50−import Squeal.PostgreSQL.Alias

51−import Squeal.PostgreSQL.Expression.Logic

52−import Squeal.PostgreSQL.List

53−import Squeal.PostgreSQL.Render

54−import Squeal.PostgreSQL.Schema

55−

56−-- $setup

57−-- >>> import Squeal.PostgreSQL

58−

59−-- | Data types are a way to limit the kind of data that can be stored in a

60−-- table. For many applications, however, the constraint they provide is

61−-- too coarse. For example, a column containing a product price should

62−-- probably only accept positive values. But there is no standard data type

63−-- that accepts only positive numbers. Another issue is that you might want

64−-- to constrain column data with respect to other columns or rows.

65−-- For example, in a table containing product information,

66−-- there should be only one row for each product number.

67−-- `TableConstraint`s give you as much control over the data in your tables

68−-- as you wish. If a user attempts to store data in a column that would

69−-- violate a constraint, an error is raised. This applies

70−-- even if the value came from the default value definition.

71−newtype TableConstraintExpression

72− (sch :: Symbol)

73− (tab :: Symbol)

74− (schemas :: SchemasType)

75− (constraint :: TableConstraint)

76− = UnsafeTableConstraintExpression

77− { renderTableConstraintExpression :: ByteString }

78− deriving (GHC.Generic,Show,Eq,Ord,NFData)

79−instance RenderSQL

80− (TableConstraintExpression sch tab schemas constraint) where

81− renderSQL = renderTableConstraintExpression

82−

83−{-| A `check` constraint is the most generic `TableConstraint` type.

84−It allows you to specify that the value in a certain column must satisfy

85−a Boolean (truth-value) expression.

86−

87−>>> :{

88−type Schema = '[

89− "tab" ::: 'Table ('[ "inequality" ::: 'Check '["a","b"]] :=> '[

90− "a" ::: 'NoDef :=> 'NotNull 'PGint4,

91− "b" ::: 'NoDef :=> 'NotNull 'PGint4

92− ])]

93−:}

94−

95−>>> :{

96−let

97− definition :: Definition (Public '[]) (Public Schema)

98− definition = createTable #tab

99− ( (int & notNullable) `as` #a :*

100− (int & notNullable) `as` #b )

101− ( check (#a :* #b) (#a .> #b) `as` #inequality )

102−:}

103−

104−>>> printSQL definition

105−CREATE TABLE "tab" ("a" int NOT NULL, "b" int NOT NULL, CONSTRAINT "inequality" CHECK (("a" > "b")));

106−-}

107−check

108− :: ( Has sch schemas schema

109− , Has tab schema ('Table table)

110− , HasAll aliases (TableToRow table) subcolumns )

111− => NP Alias aliases

112− -- ^ specify the subcolumns which are getting checked

113− -> (forall t. Condition '[] '[] 'Ungrouped schemas '[] '[t ::: subcolumns])

114− -- ^ a closed `Condition` on those subcolumns

115− -> TableConstraintExpression sch tab schemas ('Check aliases)

116−check _cols condition = UnsafeTableConstraintExpression $

117− "CHECK" <+> parenthesized (renderSQL condition)

118−

119−{-| A `unique` constraint ensure that the data contained in a column,

120−or a group of columns, is unique among all the rows in the table.

121−

122−>>> :{

123−type Schema = '[

124− "tab" ::: 'Table( '[ "uq_a_b" ::: 'Unique '["a","b"]] :=> '[

125− "a" ::: 'NoDef :=> 'Null 'PGint4,

126− "b" ::: 'NoDef :=> 'Null 'PGint4

127− ])]

128−:}

129−

130−>>> :{

131−let

132− definition :: Definition (Public '[]) (Public Schema)

133− definition = createTable #tab

134− ( (int & nullable) `as` #a :*

135− (int & nullable) `as` #b )

136− ( unique (#a :* #b) `as` #uq_a_b )

137−:}

138−

139−>>> printSQL definition

140−CREATE TABLE "tab" ("a" int NULL, "b" int NULL, CONSTRAINT "uq_a_b" UNIQUE ("a", "b"));

141−-}

142−unique

143− :: ( Has sch schemas schema

144− , Has tab schema('Table table)

145− , HasAll aliases (TableToRow table) subcolumns )

146− => NP Alias aliases

147− -- ^ specify subcolumns which together are unique for each row

148− -> TableConstraintExpression sch tab schemas ('Unique aliases)

149−unique columns = UnsafeTableConstraintExpression $

150− "UNIQUE" <+> parenthesized (renderSQL columns)

151−

152−{-| A `primaryKey` constraint indicates that a column, or group of columns,

153−can be used as a unique identifier for rows in the table.

154−This requires that the values be both unique and not null.

155−

156−>>> :{

157−type Schema = '[

158− "tab" ::: 'Table ('[ "pk_id" ::: 'PrimaryKey '["id"]] :=> '[

159− "id" ::: 'Def :=> 'NotNull 'PGint4,

160− "name" ::: 'NoDef :=> 'NotNull 'PGtext

161− ])]

162−:}

163−

164−>>> :{

165−let

166− definition :: Definition (Public '[]) (Public Schema)

167− definition = createTable #tab

168− ( serial `as` #id :*

169− (text & notNullable) `as` #name )

170− ( primaryKey #id `as` #pk_id )

171−:}

172−

173−>>> printSQL definition

174−CREATE TABLE "tab" ("id" serial, "name" text NOT NULL, CONSTRAINT "pk_id" PRIMARY KEY ("id"));

175−-}

176−primaryKey

177− :: ( Has sch schemas schema

178− , Has tab schema ('Table table)

179− , HasAll aliases (TableToColumns table) subcolumns

180− , AllNotNull subcolumns )

181− => NP Alias aliases

182− -- ^ specify the subcolumns which together form a primary key.

183− -> TableConstraintExpression sch tab schemas ('PrimaryKey aliases)

184−primaryKey columns = UnsafeTableConstraintExpression $

185− "PRIMARY KEY" <+> parenthesized (renderSQL columns)

186−

187−{-| A `foreignKey` specifies that the values in a column

188−(or a group of columns) must match the values appearing in some row of

189−another table. We say this maintains the referential integrity

190−between two related tables.

191−

192−>>> :{

193−type Schema =

194− '[ "users" ::: 'Table (

195− '[ "pk_users" ::: 'PrimaryKey '["id"] ] :=>

196− '[ "id" ::: 'Def :=> 'NotNull 'PGint4

197− , "name" ::: 'NoDef :=> 'NotNull 'PGtext

198− ])

199− , "emails" ::: 'Table (

200− '[ "pk_emails" ::: 'PrimaryKey '["id"]

201− , "fk_user_id" ::: 'ForeignKey '["user_id"] "users" '["id"]

202− ] :=>

203− '[ "id" ::: 'Def :=> 'NotNull 'PGint4

204− , "user_id" ::: 'NoDef :=> 'NotNull 'PGint4

205− , "email" ::: 'NoDef :=> 'Null 'PGtext

206− ])

207− ]

208−:}

209−

210−>>> :{

211−let

212− setup :: Definition (Public '[]) (Public Schema)

213− setup =

214− createTable #users

215− ( serial `as` #id :*

216− (text & notNullable) `as` #name )

217− ( primaryKey #id `as` #pk_users ) >>>

218− createTable #emails

219− ( serial `as` #id :*

220− (int & notNullable) `as` #user_id :*

221− (text & nullable) `as` #email )

222− ( primaryKey #id `as` #pk_emails :*

223− foreignKey #user_id #users #id

224− OnDeleteCascade OnUpdateCascade `as` #fk_user_id )

225−in printSQL setup

226−:}

227−CREATE TABLE "users" ("id" serial, "name" text NOT NULL, CONSTRAINT "pk_users" PRIMARY KEY ("id"));

228−CREATE TABLE "emails" ("id" serial, "user_id" int NOT NULL, "email" text NULL, CONSTRAINT "pk_emails" PRIMARY KEY ("id"), CONSTRAINT "fk_user_id" FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE);

229−

230−A `foreignKey` can even be a table self-reference.

231−

232−>>> :{

233−type Schema =

234− '[ "employees" ::: 'Table (

235− '[ "employees_pk" ::: 'PrimaryKey '["id"]

236− , "employees_employer_fk" ::: 'ForeignKey '["employer_id"] "employees" '["id"]

237− ] :=>

238− '[ "id" ::: 'Def :=> 'NotNull 'PGint4

239− , "name" ::: 'NoDef :=> 'NotNull 'PGtext

240− , "employer_id" ::: 'NoDef :=> 'Null 'PGint4

241− ])

242− ]

243−:}

244−

245−>>> :{

246−let

247− setup :: Definition (Public '[]) (Public Schema)

248− setup =

249− createTable #employees

250− ( serial `as` #id :*

251− (text & notNullable) `as` #name :*

252− (integer & nullable) `as` #employer_id )

253− ( primaryKey #id `as` #employees_pk :*

254− foreignKey #employer_id #employees #id

255− OnDeleteCascade OnUpdateCascade `as` #employees_employer_fk )

256−in printSQL setup

257−:}

258−CREATE TABLE "employees" ("id" serial, "name" text NOT NULL, "employer_id" integer NULL, CONSTRAINT "employees_pk" PRIMARY KEY ("id"), CONSTRAINT "employees_employer_fk" FOREIGN KEY ("employer_id") REFERENCES "employees" ("id") ON DELETE CASCADE ON UPDATE CASCADE);

259−-}

260−foreignKey

261− :: (ForeignKeyed schemas sch schema child parent

262− table reftable

263− columns refcolumns

264− constraints cols

265− reftys tys )

266− => NP Alias columns

267− -- ^ column or columns in the table

268− -> Alias parent

269− -- ^ reference table

270− -> NP Alias refcolumns

271− -- ^ reference column or columns in the reference table

272− -> OnDeleteClause

273− -- ^ what to do when reference is deleted

274− -> OnUpdateClause

275− -- ^ what to do when reference is updated

276− -> TableConstraintExpression sch child schemas

277− ('ForeignKey columns parent refcolumns)

278−foreignKey keys parent refs ondel onupd = UnsafeTableConstraintExpression $

279− "FOREIGN KEY" <+> parenthesized (renderSQL keys)

280− <+> "REFERENCES" <+> renderSQL parent

281− <+> parenthesized (renderSQL refs)

282− <+> renderSQL ondel

283− <+> renderSQL onupd

284−

285−-- | A constraint synonym between types involved in a foreign key constraint.

286−type ForeignKeyed schemas

287− sch

288− schema

289− child parent

290− table reftable

291− columns refcolumns

292− constraints cols

293− reftys tys =

294− ( Has sch schemas schema

295− , Has child schema ('Table table)

296− , Has parent schema ('Table reftable)

297− , HasAll columns (TableToColumns table) tys

298− , reftable ~ (constraints :=> cols)

299− , HasAll refcolumns cols reftys

300− , SOP.AllZip SamePGType tys reftys

301− , Uniquely refcolumns constraints )

302−

303−-- | `OnDeleteClause` indicates what to do with rows that reference a deleted row.

304−data OnDeleteClause

305− = OnDeleteNoAction

306− -- ^ if any referencing rows still exist when the constraint is checked,

307− -- an error is raised

308− | OnDeleteRestrict -- ^ prevents deletion of a referenced row

309− | OnDeleteCascade

310− -- ^ specifies that when a referenced row is deleted,

311− -- row(s) referencing it should be automatically deleted as well

312− deriving (GHC.Generic,Show,Eq,Ord)

313−instance NFData OnDeleteClause

314−-- | Render `OnDeleteClause`.

315−instance RenderSQL OnDeleteClause where

316− renderSQL = \case

317− OnDeleteNoAction -> "ON DELETE NO ACTION"

318− OnDeleteRestrict -> "ON DELETE RESTRICT"

319− OnDeleteCascade -> "ON DELETE CASCADE"

320−

321−-- | Analagous to `OnDeleteClause` there is also `OnUpdateClause` which is invoked

322−-- when a referenced column is changed (updated).

323−data OnUpdateClause

324− = OnUpdateNoAction

325− -- ^ if any referencing rows has not changed when the constraint is checked,

326− -- an error is raised

327− | OnUpdateRestrict -- ^ prevents update of a referenced row

328− | OnUpdateCascade

329− -- ^ the updated values of the referenced column(s) should be copied

330− -- into the referencing row(s)

331− deriving (GHC.Generic,Show,Eq,Ord)

332−instance NFData OnUpdateClause

333−

334−-- | Render `OnUpdateClause`.

335−instance RenderSQL OnUpdateClause where

336− renderSQL = \case

337− OnUpdateNoAction -> "ON UPDATE NO ACTION"

338− OnUpdateRestrict -> "ON UPDATE RESTRICT"

339− OnUpdateCascade -> "ON UPDATE CASCADE"

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Type.hsdeleted−229

@@ -1,229 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Type

3−Description: Create and drop type definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create and drop type definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.Type

33− ( createTypeEnum

34− , createTypeEnumFrom

35− , createTypeComposite

36− , createTypeCompositeFrom

37− , createTypeRange

38− , createDomain

39− , dropType

40− , dropTypeIfExists

41− ) where

42−

43−import Data.ByteString

44−import Data.Monoid

45−import GHC.TypeLits

46−import Prelude hiding ((.), id)

47−

48−import qualified Generics.SOP as SOP

49−

50−import Squeal.PostgreSQL.Alias

51−import Squeal.PostgreSQL.Expression.Logic

52−import Squeal.PostgreSQL.Expression.Type

53−import Squeal.PostgreSQL.Definition

54−import Squeal.PostgreSQL.List

55−import Squeal.PostgreSQL.PG

56−import Squeal.PostgreSQL.Render

57−import Squeal.PostgreSQL.Schema

58−

59−-- $setup

60−-- >>> import Squeal.PostgreSQL

61−-- >>> import qualified GHC.Generics as GHC

62−-- >>> import qualified Generics.SOP as SOP

63−

64−-- | Enumerated types are created using the `createTypeEnum` command, for example

65−--

66−-- >>> printSQL $ (createTypeEnum #mood (label @"sad" :* label @"ok" :* label @"happy") :: Definition (Public '[]) '["public" ::: '["mood" ::: 'Typedef ('PGenum '["sad","ok","happy"])]])

67−-- CREATE TYPE "mood" AS ENUM ('sad', 'ok', 'happy');

68−createTypeEnum

69− :: (KnownSymbol enum, Has sch schemas schema, SOP.All KnownSymbol labels)

70− => QualifiedAlias sch enum

71− -- ^ name of the user defined enumerated type

72− -> NP PGlabel labels

73− -- ^ labels of the enumerated type

74− -> Definition schemas (Alter sch (Create enum ('Typedef ('PGenum labels)) schema) schemas)

75−createTypeEnum enum labels = UnsafeDefinition $

76− "CREATE" <+> "TYPE" <+> renderSQL enum <+> "AS" <+> "ENUM" <+>

77− parenthesized (renderSQL labels) <> ";"

78−

79−-- | Enumerated types can also be generated from a Haskell type, for example

80−--

81−-- >>> data Schwarma = Beef | Lamb | Chicken deriving GHC.Generic

82−-- >>> instance SOP.Generic Schwarma

83−-- >>> instance SOP.HasDatatypeInfo Schwarma

84−-- >>> :{

85−-- let

86−-- createSchwarma :: Definition (Public '[]) '["public" ::: '["schwarma" ::: 'Typedef (PG (Enumerated Schwarma))]]

87−-- createSchwarma = createTypeEnumFrom @Schwarma #schwarma

88−-- in

89−-- printSQL createSchwarma

90−-- :}

91−-- CREATE TYPE "schwarma" AS ENUM ('Beef', 'Lamb', 'Chicken');

92−createTypeEnumFrom

93− :: forall hask sch enum schemas schema.

94− ( SOP.Generic hask

95− , SOP.All KnownSymbol (LabelsPG hask)

96− , KnownSymbol enum

97− , Has sch schemas schema )

98− => QualifiedAlias sch enum

99− -- ^ name of the user defined enumerated type

100− -> Definition schemas (Alter sch (Create enum ('Typedef (PG (Enumerated hask))) schema) schemas)

101−createTypeEnumFrom enum = createTypeEnum enum

102− (SOP.hpure label :: NP PGlabel (LabelsPG hask))

103−

104−{- | `createTypeComposite` creates a composite type. The composite type is

105−specified by a list of attribute names and data types.

106−

107−>>> :{

108−type PGcomplex = 'PGcomposite

109− '[ "real" ::: 'NotNull 'PGfloat8

110− , "imaginary" ::: 'NotNull 'PGfloat8 ]

111−:}

112−

113−>>> :{

114−let

115− setup :: Definition (Public '[]) '["public" ::: '["complex" ::: 'Typedef PGcomplex]]

116− setup = createTypeComposite #complex

117− (float8 `as` #real :* float8 `as` #imaginary)

118−in printSQL setup

119−:}

120−CREATE TYPE "complex" AS ("real" float8, "imaginary" float8);

121−-}

122−createTypeComposite

123− :: (KnownSymbol ty, Has sch schemas schema, SOP.SListI fields)

124− => QualifiedAlias sch ty

125− -- ^ name of the user defined composite type

126− -> NP (Aliased (TypeExpression schemas)) fields

127− -- ^ list of attribute names and data types

128− -> Definition schemas (Alter sch (Create ty ('Typedef ('PGcomposite fields)) schema) schemas)

129−createTypeComposite ty fields = UnsafeDefinition $

130− "CREATE" <+> "TYPE" <+> renderSQL ty <+> "AS" <+> parenthesized

131− (renderCommaSeparated renderField fields) <> ";"

132− where

133− renderField :: Aliased (TypeExpression schemas) x -> ByteString

134− renderField (typ `As` alias) =

135− renderSQL alias <+> renderSQL typ

136−

137−-- | Composite types can also be generated from a Haskell type, for example

138−--

139−-- >>> data Complex = Complex {real :: Double, imaginary :: Double} deriving GHC.Generic

140−-- >>> instance SOP.Generic Complex

141−-- >>> instance SOP.HasDatatypeInfo Complex

142−-- >>> type Schema = '["complex" ::: 'Typedef (PG (Composite Complex))]

143−-- >>> :{

144−-- let

145−-- createComplex :: Definition (Public '[]) (Public Schema)

146−-- createComplex = createTypeCompositeFrom @Complex #complex

147−-- in

148−-- printSQL createComplex

149−-- :}

150−-- CREATE TYPE "complex" AS ("real" float8, "imaginary" float8);

151−createTypeCompositeFrom

152− :: forall hask sch ty schemas schema.

153− ( SOP.All (FieldTyped schemas) (RowPG hask)

154− , KnownSymbol ty

155− , Has sch schemas schema )

156− => QualifiedAlias sch ty

157− -- ^ name of the user defined composite type

158− -> Definition schemas (Alter sch (Create ty ( 'Typedef (PG (Composite hask))) schema) schemas)

159−createTypeCompositeFrom ty = createTypeComposite ty

160− (SOP.hcpure (SOP.Proxy :: SOP.Proxy (FieldTyped schemas)) fieldtype

161− :: NP (Aliased (TypeExpression schemas)) (RowPG hask))

162−

163−{-|

164−`createDomain` creates a new domain. A domain is essentially a data type

165−with constraints (restrictions on the allowed set of values).

166−

167−Domains are useful for abstracting common constraints on fields

168−into a single location for maintenance. For example, several tables might

169−contain email address columns, all requiring the same `check` constraint

170−to verify the address syntax. Define a domain rather than setting up

171−each table's constraint individually.

172−

173−>>> :{

174−let

175− createPositive :: Definition (Public '[]) (Public '["positive" ::: 'Typedef 'PGfloat4])

176− createPositive = createDomain #positive real (#value .> 0 .&& (#value & isNotNull))

177−in printSQL createPositive

178−:}

179−CREATE DOMAIN "positive" AS real CHECK ((("value" > 0) AND "value" IS NOT NULL));

180−-}

181−createDomain

182− :: (Has sch schemas schema, KnownSymbol dom)

183− => QualifiedAlias sch dom

184− -> (forall null. TypeExpression schemas (null ty))

185− -> (forall tab. Condition '[] '[] 'Ungrouped schemas '[] '[tab ::: '["value" ::: 'Null ty]])

186− -> Definition schemas (Alter sch (Create dom ('Typedef ty) schema) schemas)

187−createDomain dom ty condition =

188− UnsafeDefinition $ "CREATE DOMAIN" <+> renderSQL dom

189− <+> "AS" <+> renderTypeExpression ty

190− <+> "CHECK" <+> parenthesized (renderSQL condition) <> ";"

191−

192−{- |

193−>>> :{

194−let

195− createSmallIntRange :: Definition (Public '[]) (Public '["int2range" ::: 'Typedef ('PGrange 'PGint2)])

196− createSmallIntRange = createTypeRange #int2range int2

197−in printSQL createSmallIntRange

198−:}

199−CREATE TYPE "int2range" AS RANGE (subtype = int2);

200−-}

201−createTypeRange

202− :: (Has sch schemas schema, KnownSymbol range)

203− => QualifiedAlias sch range

204− -> (forall null. TypeExpression schemas (null ty))

205− -> Definition schemas (Alter sch (Create range ('Typedef ('PGrange ty)) schema) schemas)

206−createTypeRange range ty = UnsafeDefinition $

207− "CREATE" <+> "TYPE" <+> renderSQL range <+> "AS" <+> "RANGE" <+>

208− parenthesized ("subtype" <+> "=" <+> renderTypeExpression ty) <> ";"

209−

210−-- | Drop a type.

211−--

212−-- >>> data Schwarma = Beef | Lamb | Chicken deriving GHC.Generic

213−-- >>> instance SOP.Generic Schwarma

214−-- >>> instance SOP.HasDatatypeInfo Schwarma

215−-- >>> printSQL (dropType #schwarma :: Definition '["public" ::: '["schwarma" ::: 'Typedef (PG (Enumerated Schwarma))]] (Public '[]))

216−-- DROP TYPE "schwarma";

217−dropType

218− :: (Has sch schemas schema, KnownSymbol td)

219− => QualifiedAlias sch td

220− -- ^ name of the user defined type

221− -> Definition schemas (Alter sch (DropSchemum td 'Typedef schema) schemas)

222−dropType tydef = UnsafeDefinition $ "DROP" <+> "TYPE" <+> renderSQL tydef <> ";"

223−

224−dropTypeIfExists

225− :: (Has sch schemas schema, KnownSymbol td)

226− => QualifiedAlias sch td

227− -- ^ name of the user defined type

228− -> Definition schemas (Alter sch (DropSchemumIfExists td 'Typedef schema) schemas)

229−dropTypeIfExists tydef = UnsafeDefinition $ "DROP" <+> "TYPE" <+> renderSQL tydef <> ";"

squeal-postgresql/src/Squeal/PostgreSQL/Definition/View.hsdeleted−104

@@ -1,104 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.View

3−Description: Create and drop view definitions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Create and drop view definitions.

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , ConstraintKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DerivingStrategies

17− , FlexibleContexts

18− , FlexibleInstances

19− , GADTs

20− , LambdaCase

21− , MultiParamTypeClasses

22− , OverloadedLabels

23− , OverloadedStrings

24− , RankNTypes

25− , ScopedTypeVariables

26− , TypeApplications

27− , TypeInType

28− , TypeOperators

29− , UndecidableSuperClasses

30−#-}

31−

32−module Squeal.PostgreSQL.Definition.View

33− ( createView

34− , createOrReplaceView

35− , dropView

36− , dropViewIfExists

37− ) where

38−

39−import GHC.TypeLits

40−

41−import Squeal.PostgreSQL.Alias

42−import Squeal.PostgreSQL.Definition

43−import Squeal.PostgreSQL.Query

44−import Squeal.PostgreSQL.Render

45−import Squeal.PostgreSQL.Schema

46−

47−-- $setup

48−-- >>> import Squeal.PostgreSQL

49−

50−{- | Create a view.

51−>>> type ABC = '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4]

52−>>> type BC = '["b" ::: 'Null 'PGint4, "c" ::: 'Null 'PGint4]

53−>>> :{

54−let

55− definition :: Definition

56− '[ "public" ::: '["abc" ::: 'Table ('[] :=> ABC)]]

57− '[ "public" ::: '["abc" ::: 'Table ('[] :=> ABC), "bc" ::: 'View BC]]

58− definition =

59− createView #bc (select_ (#b :* #c) (from (table #abc)))

60−in printSQL definition

61−:}

62−CREATE VIEW "bc" AS SELECT "b" AS "b", "c" AS "c" FROM "abc" AS "abc";

63−-}

64−createView

65− :: (Has sch schemas schema, KnownSymbol vw)

66− => QualifiedAlias sch vw -- ^ the name of the view to add

67− -> Query '[] '[] schemas '[] view -- ^ query

68− -> Definition schemas (Alter sch (Create vw ('View view) schema) schemas)

69−createView alias query = UnsafeDefinition $

70− "CREATE" <+> "VIEW" <+> renderSQL alias <+> "AS"

71− <+> renderQuery query <> ";"

72−

73−createOrReplaceView

74− :: (Has sch schemas schema, KnownSymbol vw)

75− => QualifiedAlias sch vw -- ^ the name of the view to add

76− -> Query '[] '[] schemas '[] view -- ^ query

77− -> Definition schemas (Alter sch (CreateOrReplace vw ('View view) schema) schemas)

78−createOrReplaceView alias query = UnsafeDefinition $

79− "CREATE OR REPLACE VIEW" <+> renderSQL alias <+> "AS"

80− <+> renderQuery query <> ";"

81−

82−-- | Drop a view.

83−--

84−-- >>> :{

85−-- let

86−-- definition :: Definition

87−-- '[ "public" ::: '["abc" ::: 'Table ('[] :=> '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4])

88−-- , "bc" ::: 'View ('["b" ::: 'Null 'PGint4, "c" ::: 'Null 'PGint4])]]

89−-- '[ "public" ::: '["abc" ::: 'Table ('[] :=> '["a" ::: 'NoDef :=> 'Null 'PGint4, "b" ::: 'NoDef :=> 'Null 'PGint4, "c" ::: 'NoDef :=> 'Null 'PGint4])]]

90−-- definition = dropView #bc

91−-- in printSQL definition

92−-- :}

93−-- DROP VIEW "bc";

94−dropView

95− :: (Has sch schemas schema, KnownSymbol vw)

96− => QualifiedAlias sch vw -- ^ view to remove

97− -> Definition schemas (Alter sch (DropSchemum vw 'View schema) schemas)

98−dropView vw = UnsafeDefinition $ "DROP VIEW" <+> renderSQL vw <> ";"

99−

100−dropViewIfExists

101− :: (Has sch schemas schema, KnownSymbol vw)

102− => QualifiedAlias sch vw -- ^ view to remove

103− -> Definition schemas (Alter sch (DropIfExists vw schema) schemas)

104−dropViewIfExists vw = UnsafeDefinition $ "DROP VIEW IF EXISTS" <+> renderSQL vw <> ";"

squeal-postgresql/src/Squeal/PostgreSQL/Expression.hs+17−91

@@ -34,26 +34,17 @@ module Squeal.PostgreSQL.Expression

3434 ( -- * Expression

3535 Expression (..)

3636 , Expr

37− , type (-->)

38− , FunctionDB

37+ , (:-->)

3938 , unsafeFunction

40− , function

41− , unsafeLeftOp

42− , leftOp

43− , unsafeRightOp

44− , rightOp

39+ , unsafeUnaryOpL

40+ , unsafeUnaryOpR

4541 , Operator

46− , OperatorDB

4742 , unsafeBinaryOp

48− , binaryOp

4943 , FunctionVar

5044 , unsafeFunctionVar

51− , type (--->)

52− , FunctionNDB

45+ , FunctionN

5346 , unsafeFunctionN

54− , functionN

5547 , PGSubset (..)

56− , PGIntersect (..)

5748 -- * Re-export

5849 , (&)

5950 , K (..)

@@ -145,54 +136,31 @@ type Operator x1 x2 y

145136 -> Expression outer commons grp schemas params from y

146137 -- ^ output

147138

148−type OperatorDB schemas x1 x2 y

149− = forall outer commons grp params from

150− . Expression outer commons grp schemas params from x1

151− -- ^ left input

152− -> Expression outer commons grp schemas params from x2

153− -- ^ right input

154− -> Expression outer commons grp schemas params from y

155− -- ^ output

156−

157139-- | A @RankNType@ for functions with a single argument.

158140-- These could be either function calls or unary operators.

159141-- This is a subtype of the usual Haskell function type `Prelude.->`,

160142-- indeed a subcategory as it is closed under the usual

161143-- `Prelude..` and `Prelude.id`.

162−type (-->) x y

144+type (:-->) x y

163145 = forall outer commons grp schemas params from

164146 . Expression outer commons grp schemas params from x

165147 -- ^ input

166148 -> Expression outer commons grp schemas params from y

167149 -- ^ output

168150

169−type FunctionDB schemas x y

170− = forall outer commons grp params from

171− . Expression outer commons grp schemas params from x

172− -- ^ input

173− -> Expression outer commons grp schemas params from y

174− -- ^ output

175−

176151{- | A @RankNType@ for functions with a fixed-length list of heterogeneous arguments.

177152Use the `*:` operator to end your argument lists, like so.

178153

179154>>> printSQL (unsafeFunctionN "fun" (true :* false :* localTime *: true))

180155fun(TRUE, FALSE, LOCALTIME, TRUE)

181156-}

182−type (--->) xs y

157+type FunctionN xs y

183158 = forall outer commons grp schemas params from

184159 . NP (Expression outer commons grp schemas params from) xs

185160 -- ^ inputs

186161 -> Expression outer commons grp schemas params from y

187162 -- ^ output

188163

189−type FunctionNDB schemas xs y

190− = forall outer commons grp params from

191− . NP (Expression outer commons grp schemas params from) xs

192− -- ^ inputs

193− -> Expression outer commons grp schemas params from y

194− -- ^ output

195−

196164{- | A @RankNType@ for functions with a variable-length list of

197165homogeneous arguments and at least 1 more argument.

198166-}

@@ -318,63 +286,28 @@ unsafeBinaryOp :: ByteString -> Operator ty0 ty1 ty2

318286unsafeBinaryOp op x y = UnsafeExpression $ parenthesized $

319287 renderSQL x <+> op <+> renderSQL y

320288

321−binaryOp

322− :: forall op sch schemas schema x y z.

323− ( Has sch schemas schema

324− , Has op schema ('Operator ('BinaryOp x y z)) )

325− => OperatorDB schemas x y z

326−binaryOp = unsafeBinaryOp $ renderSymbol @op

327−

328−-- | >>> printSQL $ unsafeLeftOp "NOT" true

289+-- | >>> printSQL $ unsafeUnaryOpL "NOT" true

329290-- (NOT TRUE)

330−unsafeLeftOp :: ByteString -> x --> y

331−unsafeLeftOp op x = UnsafeExpression $ parenthesized $ op <+> renderSQL x

291+unsafeUnaryOpL :: ByteString -> x :--> y

292+unsafeUnaryOpL op x = UnsafeExpression $ parenthesized $ op <+> renderSQL x

332293

333−leftOp

334− :: forall op sch schemas schema x y.

335− ( Has sch schemas schema

336− , Has op schema ('Operator ('LeftOp x y)) )

337− => FunctionDB schemas x y

338−leftOp = unsafeLeftOp $ renderSymbol @op

339−

340−-- | >>> printSQL $ true & unsafeRightOp "IS NOT TRUE"

294+-- | >>> printSQL $ true & unsafeUnaryOpR "IS NOT TRUE"

341295-- (TRUE IS NOT TRUE)

342−unsafeRightOp :: ByteString -> x --> y

343−unsafeRightOp op x = UnsafeExpression $ parenthesized $ renderSQL x <+> op

344−

345−rightOp

346− :: forall op sch schemas schema x y.

347− ( Has sch schemas schema

348− , Has op schema ('Operator ('RightOp x y)) )

349− => FunctionDB schemas x y

350−rightOp = unsafeRightOp $ renderSymbol @op

296+unsafeUnaryOpR :: ByteString -> x :--> y

297+unsafeUnaryOpR op x = UnsafeExpression $ parenthesized $ renderSQL x <+> op

351298

352299-- | >>> printSQL $ unsafeFunction "f" true

353300-- f(TRUE)

354−unsafeFunction :: ByteString -> x --> y

301+unsafeFunction :: ByteString -> x :--> y

355302unsafeFunction fun x = UnsafeExpression $

356303 fun <> parenthesized (renderSQL x)

357304

358−function

359− :: (Has sch schemas schema, Has fun schema ('Function ('[x] :=> 'Returns y)))

360− => QualifiedAlias sch fun

361− -> FunctionDB schemas x y

362−function = unsafeFunction . renderSQL

363−

364305-- | >>> printSQL $ unsafeFunctionN "f" (currentTime :* localTimestamp :* false *: literal 'a')

365306-- f(CURRENT_TIME, LOCALTIMESTAMP, FALSE, E'a')

366−unsafeFunctionN :: SListI xs => ByteString -> xs ---> y

307+unsafeFunctionN :: SListI xs => ByteString -> FunctionN xs y

367308unsafeFunctionN fun xs = UnsafeExpression $

368309 fun <> parenthesized (renderCommaSeparated renderSQL xs)

369310

370−functionN

371− :: ( Has sch schemas schema

372− , Has fun schema ('Function (xs :=> 'Returns y))

373− , SListI xs )

374− => QualifiedAlias sch fun

375− -> FunctionNDB schemas xs y

376−functionN = unsafeFunctionN . renderSQL

377−

378311instance ty `In` PGNum

379312 => Num (Expression outer commons grp schemas params from (null ty)) where

380313 (+) = unsafeBinaryOp "+"

@@ -420,21 +353,14 @@ instance (ty `In` PGNum, ty `In` PGFloating) => Floating

420353 atanh x = log ((1 + x) / (1 - x)) / 2

421354

422355-- | Contained by operators

423−class PGSubset ty where

424− (@>) :: Operator (null0 ty) (null1 ty) ('Null 'PGbool)

356+class PGSubset container where

357+ (@>) :: Operator (null0 container) (null1 container) ('Null 'PGbool)

425358 (@>) = unsafeBinaryOp "@>"

426− (<@) :: Operator (null0 ty) (null1 ty) ('Null 'PGbool)

359+ (<@) :: Operator (null0 container) (null1 container) ('Null 'PGbool)

427360 (<@) = unsafeBinaryOp "<@"

428361instance PGSubset 'PGjsonb

429362instance PGSubset 'PGtsquery

430363instance PGSubset ('PGvararray ty)

431−instance PGSubset ('PGrange ty)

432−

433−class PGIntersect ty where

434− (@&&) :: Operator (null0 ty) (null1 ty) ('Null 'PGbool)

435− (@&&) = unsafeBinaryOp "&&"

436−instance PGIntersect ('PGvararray ty)

437−instance PGIntersect ('PGrange ty)

438364

439365instance IsString

440366 (Expression outer commons grp schemas params from (null 'PGtext)) where

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Collection.hs+5−5

@@ -42,7 +42,7 @@ import qualified Generics.SOP as SOP

4242

4343import Squeal.PostgreSQL.Alias

4444import Squeal.PostgreSQL.Expression

45−import Squeal.PostgreSQL.Expression.Set

45+import Squeal.PostgreSQL.Expression.SetOf

4646import Squeal.PostgreSQL.List

4747import Squeal.PostgreSQL.Render

4848import Squeal.PostgreSQL.Schema

@@ -111,20 +111,20 @@ array2 xss = UnsafeExpression $ "ARRAY" <>

111111

112112-- | >>> printSQL $ cardinality (array [null_, false, true])

113113-- cardinality(ARRAY[NULL, FALSE, TRUE])

114−cardinality :: null ('PGvararray ty) --> null 'PGint8

114+cardinality :: null ('PGvararray ty) :--> null 'PGint8

115115cardinality = unsafeFunction "cardinality"

116116

117117-- | >>> printSQL $ array [null_, false, true] & index 2

118118-- (ARRAY[NULL, FALSE, TRUE])[2]

119119index

120120 :: Word64 -- ^ index

121− -> null ('PGvararray ty) --> NullifyType ty

121+ -> null ('PGvararray ty) :--> NullifyType ty

122122index n expr = UnsafeExpression $

123123 parenthesized (renderSQL expr) <> "[" <> fromString (show n) <> "]"

124124

125125-- | Expand an array to a set of rows

126−unnest :: SetFunction "unnest" (null ('PGvararray ty)) '["unnest" ::: ty]

127−unnest = unsafeSetFunction

126+unnest :: SetOfFunction "unnest" (null ('PGvararray ty)) '["unnest" ::: ty]

127+unnest = unsafeSetOfFunction

128128

129129-- | A row constructor is an expression that builds a row value

130130-- (also called a composite value) using values for its member fields.

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Comparison.hs+12−12

@@ -162,45 +162,45 @@ isNotDistinctFrom = unsafeBinaryOp "IS NOT DISTINCT FROM"

162162>>> printSQL $ true & isTrue

163163(TRUE IS TRUE)

164164-}

165−isTrue :: null0 'PGbool --> null1 'PGbool

166−isTrue = unsafeRightOp "IS TRUE"

165+isTrue :: null0 'PGbool :--> null1 'PGbool

166+isTrue = unsafeUnaryOpR "IS TRUE"

167167

168168{- | is false or unknown

169169

170170>>> printSQL $ true & isNotTrue

171171(TRUE IS NOT TRUE)

172172-}

173−isNotTrue :: null0 'PGbool --> null1 'PGbool

174−isNotTrue = unsafeRightOp "IS NOT TRUE"

173+isNotTrue :: null0 'PGbool :--> null1 'PGbool

174+isNotTrue = unsafeUnaryOpR "IS NOT TRUE"

175175

176176{- | is false

177177

178178>>> printSQL $ true & isFalse

179179(TRUE IS FALSE)

180180-}

181−isFalse :: null0 'PGbool --> null1 'PGbool

182−isFalse = unsafeRightOp "IS FALSE"

181+isFalse :: null0 'PGbool :--> null1 'PGbool

182+isFalse = unsafeUnaryOpR "IS FALSE"

183183

184184{- | is true or unknown

185185

186186>>> printSQL $ true & isNotFalse

187187(TRUE IS NOT FALSE)

188188-}

189−isNotFalse :: null0 'PGbool --> null1 'PGbool

190−isNotFalse = unsafeRightOp "IS NOT FALSE"

189+isNotFalse :: null0 'PGbool :--> null1 'PGbool

190+isNotFalse = unsafeUnaryOpR "IS NOT FALSE"

191191

192192{- | is unknown

193193

194194>>> printSQL $ true & isUnknown

195195(TRUE IS UNKNOWN)

196196-}

197−isUnknown :: null0 'PGbool --> null1 'PGbool

198−isUnknown = unsafeRightOp "IS UNKNOWN"

197+isUnknown :: null0 'PGbool :--> null1 'PGbool

198+isUnknown = unsafeUnaryOpR "IS UNKNOWN"

199199

200200{- | is true or false

201201

202202>>> printSQL $ true & isNotUnknown

203203(TRUE IS NOT UNKNOWN)

204204-}

205−isNotUnknown :: null0 'PGbool --> null1 'PGbool

206−isNotUnknown = unsafeRightOp "IS NOT UNKNOWN"

205+isNotUnknown :: null0 'PGbool :--> null1 'PGbool

206+isNotUnknown = unsafeUnaryOpR "IS NOT UNKNOWN"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Json.hs+47−40

@@ -81,7 +81,7 @@ import GHC.TypeLits

8181

8282import Squeal.PostgreSQL.Alias

8383import Squeal.PostgreSQL.Expression

84−import Squeal.PostgreSQL.Expression.Set

84+import Squeal.PostgreSQL.Expression.SetOf

8585import Squeal.PostgreSQL.Expression.Type

8686import Squeal.PostgreSQL.List

8787import Squeal.PostgreSQL.Query

@@ -188,7 +188,7 @@ Table 9.45: JSON creation functions

188188-- otherwise, a scalar value is produced. For any scalar type other than a

189189-- number, a Boolean, or a null value, the text representation will be used, in

190190-- such a fashion that it is a valid json value.

191−toJson :: null ty --> null 'PGjson

191+toJson :: null ty :--> null 'PGjson

192192toJson = unsafeFunction "to_json"

193193

194194-- | Returns the value as jsonb. Arrays and composites are converted

@@ -197,26 +197,26 @@ toJson = unsafeFunction "to_json"

197197-- otherwise, a scalar value is produced. For any scalar type other than a

198198-- number, a Boolean, or a null value, the text representation will be used, in

199199-- such a fashion that it is a valid jsonb value.

200−toJsonb :: null ty --> null 'PGjsonb

200+toJsonb :: null ty :--> null 'PGjsonb

201201toJsonb = unsafeFunction "to_jsonb"

202202

203203-- | Returns the array as a JSON array. A PostgreSQL multidimensional array

204204-- becomes a JSON array of arrays.

205−arrayToJson :: null ('PGvararray ty) --> null 'PGjson

205+arrayToJson :: null ('PGvararray ty) :--> null 'PGjson

206206arrayToJson = unsafeFunction "array_to_json"

207207

208208-- | Returns the row as a JSON object.

209−rowToJson :: null ('PGcomposite ty) --> null 'PGjson

209+rowToJson :: null ('PGcomposite ty) :--> null 'PGjson

210210rowToJson = unsafeFunction "row_to_json"

211211

212212-- | Builds a possibly-heterogeneously-typed JSON array out of a variadic

213213-- argument list.

214−jsonBuildArray :: SOP.SListI tuple => tuple ---> null 'PGjson

214+jsonBuildArray :: SOP.SListI tuple => FunctionN tuple (null 'PGjson)

215215jsonBuildArray = unsafeFunctionN "json_build_array"

216216

217217-- | Builds a possibly-heterogeneously-typed (binary) JSON array out of a

218218-- variadic argument list.

219−jsonbBuildArray :: SOP.SListI tuple => tuple ---> null 'PGjsonb

219+jsonbBuildArray :: SOP.SListI tuple => FunctionN tuple (null 'PGjsonb)

220220jsonbBuildArray = unsafeFunctionN "jsonb_build_array"

221221

222222-- | Builds a possibly-heterogeneously-typed JSON object out of a variadic

@@ -224,10 +224,10 @@ jsonbBuildArray = unsafeFunctionN "jsonb_build_array"

224224-- and values.

225225class SOP.SListI tys => JsonBuildObject tys where

226226

227− jsonBuildObject :: tys ---> null 'PGjson

227+ jsonBuildObject :: FunctionN tys (null 'PGjson)

228228 jsonBuildObject = unsafeFunctionN "json_build_object"

229229

230− jsonbBuildObject :: tys ---> null 'PGjsonb

230+ jsonbBuildObject :: FunctionN tys (null 'PGjsonb)

231231 jsonbBuildObject = unsafeFunctionN "jsonb_build_object"

232232

233233instance JsonBuildObject '[]

@@ -240,7 +240,7 @@ instance (JsonBuildObject tys, key `In` PGJsonKey)

240240-- which are taken as a key/value pair.

241241jsonObject

242242 :: null ('PGfixarray '[n,2] ('NotNull 'PGtext))

243− --> null 'PGjson

243+ :--> null 'PGjson

244244jsonObject = unsafeFunction "json_object"

245245

246246-- | Builds a binary JSON object out of a text array.

@@ -249,24 +249,24 @@ jsonObject = unsafeFunction "json_object"

249249-- which are taken as a key/value pair.

250250jsonbObject

251251 :: null ('PGfixarray '[n,2] ('NotNull 'PGtext))

252− --> null 'PGjsonb

252+ :--> null 'PGjsonb

253253jsonbObject = unsafeFunction "jsonb_object"

254254

255255-- | This is an alternate form of 'jsonObject' that takes two arrays; one for

256256-- keys and one for values, that are zipped pairwise to create a JSON object.

257−jsonZipObject ::

257+jsonZipObject :: FunctionN

258258 '[ null ('PGvararray ('NotNull 'PGtext))

259259 , null ('PGvararray ('NotNull 'PGtext)) ]

260− ---> null 'PGjson

260+ ( null 'PGjson )

261261jsonZipObject = unsafeFunctionN "json_object"

262262

263263-- | This is an alternate form of 'jsonbObject' that takes two arrays; one for

264264-- keys and one for values, that are zipped pairwise to create a binary JSON

265265-- object.

266−jsonbZipObject ::

266+jsonbZipObject :: FunctionN

267267 '[ null ('PGvararray ('NotNull 'PGtext))

268268 , null ('PGvararray ('NotNull 'PGtext)) ]

269− ---> null 'PGjsonb

269+ ( null 'PGjsonb )

270270jsonbZipObject = unsafeFunctionN "jsonb_object"

271271

272272{-----------------------------------------

@@ -274,31 +274,31 @@ Table 9.46: JSON processing functions

274274-----------------------------------------}

275275

276276-- | Returns the number of elements in the outermost JSON array.

277−jsonArrayLength :: null 'PGjson --> null 'PGint4

277+jsonArrayLength :: null 'PGjson :--> null 'PGint4

278278jsonArrayLength = unsafeFunction "json_array_length"

279279

280280-- | Returns the number of elements in the outermost binary JSON array.

281−jsonbArrayLength :: null 'PGjsonb --> null 'PGint4

281+jsonbArrayLength :: null 'PGjsonb :--> null 'PGint4

282282jsonbArrayLength = unsafeFunction "jsonb_array_length"

283283

284284-- | Returns the type of the outermost JSON value as a text string. Possible

285285-- types are object, array, string, number, boolean, and null.

286−jsonTypeof :: null 'PGjson --> null 'PGtext

286+jsonTypeof :: null 'PGjson :--> null 'PGtext

287287jsonTypeof = unsafeFunction "json_typeof"

288288

289289-- | Returns the type of the outermost binary JSON value as a text string.

290290-- Possible types are object, array, string, number, boolean, and null.

291−jsonbTypeof :: null 'PGjsonb --> null 'PGtext

291+jsonbTypeof :: null 'PGjsonb :--> null 'PGtext

292292jsonbTypeof = unsafeFunction "jsonb_typeof"

293293

294294-- | Returns its argument with all object fields that have null values omitted.

295295-- Other null values are untouched.

296−jsonStripNulls :: null 'PGjson --> null 'PGjson

296+jsonStripNulls :: null 'PGjson :--> null 'PGjson

297297jsonStripNulls = unsafeFunction "json_strip_nulls"

298298

299299-- | Returns its argument with all object fields that have null values omitted.

300300-- Other null values are untouched.

301−jsonbStripNulls :: null 'PGjsonb --> null 'PGjsonb

301+jsonbStripNulls :: null 'PGjsonb :--> null 'PGjsonb

302302jsonbStripNulls = unsafeFunction "jsonb_strip_nulls"

303303

304304-- | @ jsonbSet target path new_value create_missing @

@@ -309,9 +309,12 @@ jsonbStripNulls = unsafeFunction "jsonb_strip_nulls"

309309-- item designated by path does not exist. As with the path orientated

310310-- operators, negative integers that appear in path count from the end of JSON

311311-- arrays.

312−jsonbSet ::

313− '[ null 'PGjsonb, null ('PGvararray ('NotNull 'PGtext))

314− , null 'PGjsonb, null 'PGbool ] ---> null 'PGjsonb

312+jsonbSet

313+ :: FunctionN

314+ '[ null 'PGjsonb

315+ , null ('PGvararray ('NotNull 'PGtext))

316+ , null 'PGjsonb

317+ , null 'PGbool ] (null 'PGjsonb)

315318jsonbSet = unsafeFunctionN "jsonbSet"

316319

317320-- | @ jsonbInsert target path new_value insert_after @

@@ -323,23 +326,27 @@ jsonbSet = unsafeFunctionN "jsonbSet"

323326-- path is in JSONB object, @new_value@ will be inserted only if target does not

324327-- exist. As with the path orientated operators, negative integers that appear

325328-- in path count from the end of JSON arrays.

326−jsonbInsert ::

327− '[ null 'PGjsonb, null ('PGvararray ('NotNull 'PGtext))

328− , null 'PGjsonb, null 'PGbool ] ---> null 'PGjsonb

329+jsonbInsert

330+ :: FunctionN

331+ '[ null 'PGjsonb

332+ , null ('PGvararray ('NotNull 'PGtext))

333+ , null 'PGjsonb

334+ , null 'PGbool ] (null 'PGjsonb)

329335jsonbInsert = unsafeFunctionN "jsonb_insert"

330336

331337-- | Returns its argument as indented JSON text.

332−jsonbPretty :: null 'PGjsonb --> null 'PGtext

338+jsonbPretty :: null 'PGjsonb :--> null 'PGtext

333339jsonbPretty = unsafeFunction "jsonb_pretty"

334340

341+

335342{- | Expands the outermost JSON object into a set of key/value pairs.

336343

337344>>> printSQL (select Star (from (jsonEach (literal (Json (object ["a" .= "foo", "b" .= "bar"]))))))

338345SELECT * FROM json_each(('{"a":"foo","b":"bar"}' :: json))

339346-}

340−jsonEach :: SetFunction "json_each" (null 'PGjson)

347+jsonEach :: SetOfFunction "json_each" (null 'PGjson)

341348 '["key" ::: 'NotNull 'PGtext, "value" ::: 'NotNull 'PGjson]

342−jsonEach = unsafeSetFunction

349+jsonEach = unsafeSetOfFunction

343350

344351{- | Expands the outermost binary JSON object into a set of key/value pairs.

345352

@@ -347,9 +354,9 @@ jsonEach = unsafeSetFunction

347354SELECT * FROM jsonb_each(('{"a":"foo","b":"bar"}' :: jsonb))

348355-}

349356jsonbEach

350− :: SetFunction "jsonb_each" (nullity 'PGjsonb)

357+ :: SetOfFunction "jsonb_each" (nullity 'PGjsonb)

351358 '["key" ::: 'NotNull 'PGtext, "value" ::: 'NotNull 'PGjson]

352−jsonbEach = unsafeSetFunction

359+jsonbEach = unsafeSetOfFunction

353360

354361{- | Expands the outermost JSON object into a set of key/value pairs.

355362

@@ -357,9 +364,9 @@ jsonbEach = unsafeSetFunction

357364SELECT * FROM json_each_text(('{"a":"foo","b":"bar"}' :: json))

358365-}

359366jsonEachText

360− :: SetFunction "json_each_text" (null 'PGjson)

367+ :: SetOfFunction "json_each_text" (null 'PGjson)

361368 '["key" ::: 'NotNull 'PGtext, "value" ::: 'NotNull 'PGtext]

362−jsonEachText = unsafeSetFunction

369+jsonEachText = unsafeSetOfFunction

363370

364371{- | Expands the outermost binary JSON object into a set of key/value pairs.

365372

@@ -367,9 +374,9 @@ jsonEachText = unsafeSetFunction

367374SELECT * FROM jsonb_each_text(('{"a":"foo","b":"bar"}' :: jsonb))

368375-}

369376jsonbEachText

370− :: SetFunction "jsonb_each_text" (null 'PGjsonb)

377+ :: SetOfFunction "jsonb_each_text" (null 'PGjsonb)

371378 '["key" ::: 'NotNull 'PGtext, "value" ::: 'NotNull 'PGtext]

372−jsonbEachText = unsafeSetFunction

379+jsonbEachText = unsafeSetOfFunction

373380

374381{- | Returns set of keys in the outermost JSON object.

375382

@@ -377,9 +384,9 @@ jsonbEachText = unsafeSetFunction

377384json_object_keys(('{"a":"foo","b":"bar"}' :: json))

378385-}

379386jsonObjectKeys

380− :: SetFunction "json_object_keys" (nullity 'PGjson)

387+ :: SetOfFunction "json_object_keys" (nullity 'PGjson)

381388 '["json_object_keys" ::: 'NotNull 'PGtext]

382−jsonObjectKeys = unsafeSetFunction

389+jsonObjectKeys = unsafeSetOfFunction

383390

384391{- | Returns set of keys in the outermost JSON object.

385392

@@ -387,9 +394,9 @@ jsonObjectKeys = unsafeSetFunction

387394jsonb_object_keys(('{"a":"foo","b":"bar"}' :: jsonb))

388395-}

389396jsonbObjectKeys

390− :: SetFunction "jsonb_object_keys" (null 'PGjsonb)

397+ :: SetOfFunction "jsonb_object_keys" (null 'PGjsonb)

391398 '["jsonb_object_keys" ::: 'NotNull 'PGtext]

392−jsonbObjectKeys = unsafeSetFunction

399+jsonbObjectKeys = unsafeSetOfFunction

393400

394401-- | Build rows from Json types.

395402type JsonPopulateFunction fun json

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Logic.hs+2−2

@@ -47,8 +47,8 @@ false = UnsafeExpression "FALSE"

4747

4848-- | >>> printSQL $ not_ true

4949-- (NOT TRUE)

50−not_ :: null 'PGbool --> null 'PGbool

51−not_ = unsafeLeftOp "NOT"

50+not_ :: null 'PGbool :--> null 'PGbool

51+not_ = unsafeUnaryOpL "NOT"

5252

5353-- | >>> printSQL $ true .&& false

5454-- (TRUE AND FALSE)

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Math.hs+6−4

@@ -37,7 +37,9 @@ import Squeal.PostgreSQL.Schema

3737-- in printSQL expression

3838-- :}

3939-- atan2(pi(), 2)

40−atan2_ :: float `In` PGFloating => '[ null float, null float] ---> null float

40+atan2_

41+ :: float `In` PGFloating

42+ => FunctionN '[ null float, null float] (null float)

4143atan2_ = unsafeFunctionN "atan2"

4244

4345

@@ -76,7 +78,7 @@ rem_ = unsafeBinaryOp "%"

7678-- in printSQL expression

7779-- :}

7880-- trunc(pi())

79−trunc :: frac `In` PGFloating => null frac --> null frac

81+trunc :: frac `In` PGFloating => null frac :--> null frac

8082trunc = unsafeFunction "trunc"

8183

8284-- | >>> :{

@@ -86,7 +88,7 @@ trunc = unsafeFunction "trunc"

8688-- in printSQL expression

8789-- :}

8890-- round(pi())

89−round_ :: frac `In` PGFloating => null frac --> null frac

91+round_ :: frac `In` PGFloating => null frac :--> null frac

9092round_ = unsafeFunction "round"

9193

9294-- | >>> :{

@@ -96,5 +98,5 @@ round_ = unsafeFunction "round"

9698-- in printSQL expression

9799-- :}

98100-- ceiling(pi())

99−ceiling_ :: frac `In` PGFloating => null frac --> null frac

101+ceiling_ :: frac `In` PGFloating => null frac :--> null frac

100102ceiling_ = unsafeFunction "ceiling"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Null.hs+4−4

@@ -44,7 +44,7 @@ null_ = UnsafeExpression "NULL"

4444--

4545-- >>> printSQL $ notNull true

4646-- TRUE

47−notNull :: 'NotNull ty --> 'Null ty

47+notNull :: 'NotNull ty :--> 'Null ty

4848notNull = UnsafeExpression . renderSQL

4949

5050-- | return the leftmost value which is not NULL

@@ -69,12 +69,12 @@ fromNull notNullx nullx = coalesce [nullx] notNullx

6969

7070-- | >>> printSQL $ null_ & isNull

7171-- NULL IS NULL

72−isNull :: 'Null ty --> null 'PGbool

72+isNull :: 'Null ty :--> null 'PGbool

7373isNull x = UnsafeExpression $ renderSQL x <+> "IS NULL"

7474

7575-- | >>> printSQL $ null_ & isNotNull

7676-- NULL IS NOT NULL

77−isNotNull :: 'Null ty --> null 'PGbool

77+isNotNull :: 'Null ty :--> null 'PGbool

7878isNotNull x = UnsafeExpression $ renderSQL x <+> "IS NOT NULL"

7979

8080-- | analagous to `maybe` using @IS NULL@

@@ -100,5 +100,5 @@ matchNull y f x = ifThenElse (isNull x) y

100100>>> printSQL expr

101101NULLIF(FALSE, ($1 :: bool))

102102-}

103−nullIf :: '[ 'NotNull ty, 'NotNull ty] ---> 'Null ty

103+nullIf :: FunctionN '[ 'NotNull ty, 'NotNull ty] ('Null ty)

104104nullIf = unsafeFunctionN "NULLIF"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Range.hsdeleted−230

@@ -1,230 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Expression.Range

3−Description: range types and functions

4−Copyright: (c) Eitan Chatav, 2019

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Range types and functions

9−-}

10−

11−{-# LANGUAGE

12− AllowAmbiguousTypes

13− , DataKinds

14− , DeriveAnyClass

15− , DeriveGeneric

16− , DeriveFoldable

17− , DerivingStrategies

18− , DeriveTraversable

19− , FlexibleContexts

20− , FlexibleInstances

21− , LambdaCase

22− , MultiParamTypeClasses

23− , OverloadedLabels

24− , OverloadedStrings

25− , PatternSynonyms

26− , RankNTypes

27− , ScopedTypeVariables

28− , TypeApplications

29− , TypeFamilies

30− , TypeOperators

31− , UndecidableInstances

32−#-}

33−

34−module Squeal.PostgreSQL.Expression.Range

35− ( range

36− , Range (..)

37− , (<=..<=), (<..<), (<=..<), (<..<=)

38− , moreThan, atLeast, lessThan, atMost

39− , singleton, whole

40− , Bound (..)

41− , (.<@)

42− , (@>.)

43− , (<<@)

44− , (@>>)

45− , (&<)

46− , (&>)

47− , (-|-)

48− , (@+)

49− , (@*)

50− , (@-)

51− , lowerBound

52− , upperBound

53− , isEmpty

54− , lowerInc

55− , lowerInf

56− , upperInc

57− , upperInf

58− , rangeMerge

59− ) where

60−

61−import BinaryParser

62−import ByteString.StrictBuilder

63−import Data.Bits

64−import qualified GHC.Generics as GHC

65−import qualified Generics.SOP as SOP

66−import qualified PostgreSQL.Binary.Decoding as Decoding

67−

68−import Squeal.PostgreSQL.Binary

69−import Squeal.PostgreSQL.Expression

70−import Squeal.PostgreSQL.Expression.Type hiding (bool)

71−import Squeal.PostgreSQL.PG

72−import Squeal.PostgreSQL.Render

73−import Squeal.PostgreSQL.Schema

74−

75−-- $setup

76−-- >>> import Squeal.PostgreSQL

77−

78−-- | Construct a `range`

79−--

80−-- >>> printSQL $ range tstzrange (atLeast now)

81−-- tstzrange(now(), NULL, '[)')

82−-- >>> printSQL $ range numrange (0 <=..< 2*pi)

83−-- numrange(0, (2 * pi()), '[)')

84−-- >>> printSQL $ range int4range Empty

85−-- ('empty' :: int4range)

86−range

87− :: TypeExpression schemas (null ('PGrange ty))

88− -> Range (Expression outer commons grp schemas params from ('NotNull ty))

89− -> Expression outer commons grp schemas params from (null ('PGrange ty))

90−range ty = \case

91− Empty -> UnsafeExpression $ parenthesized

92− (emp <+> "::" <+> renderSQL ty)

93− NonEmpty l u -> UnsafeExpression $ renderSQL ty <> parenthesized

94− (commaSeparated (args l u))

95− where

96− emp = singleQuote <> "empty" <> singleQuote

97− args l u = [arg l, arg u, singleQuote <> bra l <> ket u <> singleQuote]

98− singleQuote = "\'"

99− arg = \case

100− Infinite -> "NULL"; Closed x -> renderSQL x; Open x -> renderSQL x

101− bra = \case Infinite -> "("; Closed _ -> "["; Open _ -> "("

102− ket = \case Infinite -> ")"; Closed _ -> "]"; Open _ -> ")"

103−

104−data Bound x = Infinite | Closed x | Open x

105− deriving

106− ( Eq, Ord, Show, Read, GHC.Generic

107− , Functor, Foldable, Traversable )

108−

109−data Range x = Empty | NonEmpty (Bound x) (Bound x)

110− deriving

111− ( Eq, Ord, Show, Read, GHC.Generic

112− , Functor, Foldable, Traversable )

113− deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)

114−type instance PG (Range x) = 'PGrange (PG x)

115−instance ToParam x pg => ToParam (Range x) ('PGrange pg) where

116− toParam rng = K $

117− word8 (setFlags rng 0) <>

118− case rng of

119− Empty -> mempty

120− NonEmpty lower upper -> putBound lower <> putBound upper

121− where

122− putBound = \case

123− Infinite -> mempty

124− Closed value -> putValue (unK (toParam @x @pg value))

125− Open value -> putValue (unK (toParam @x @pg value))

126− putValue value = int32BE (fromIntegral (builderLength value)) <> value

127− setFlags = \case

128− Empty -> (`setBit` 0)

129− NonEmpty lower upper ->

130− setLowerFlags lower . setUpperFlags upper

131− setLowerFlags = \case

132− Infinite -> (`setBit` 3)

133− Closed _ -> (`setBit` 1)

134− Open _ -> id

135− setUpperFlags = \case

136− Infinite -> (`setBit` 4)

137− Closed _ -> (`setBit` 2)

138− Open _ -> id

139−instance FromValue pg y => FromValue ('PGrange pg) (Range y) where

140− fromValue = do

141− flag <- byte

142− if testBit flag 0 then return Empty else do

143− lower <-

144− if testBit flag 3

145− then return Infinite

146− else do

147− len <- sized 4 Decoding.int

148− l <- sized len (fromValue @pg)

149− return $ if testBit flag 1 then Closed l else Open l

150− upper <-

151− if testBit flag 4

152− then return Infinite

153− else do

154− len <- sized 4 Decoding.int

155− l <- sized len (fromValue @pg)

156− return $ if testBit flag 2 then Closed l else Open l

157− return $ NonEmpty lower upper

158−

159−(<=..<=), (<..<), (<=..<), (<..<=) :: x -> x -> Range x

160−infix 4 <=..<=, <..<, <=..<, <..<=

161−x <=..<= y = NonEmpty (Closed x) (Closed y)

162−x <..< y = NonEmpty (Open x) (Open y)

163−x <=..< y = NonEmpty (Closed x) (Open y)

164−x <..<= y = NonEmpty (Open x) (Closed y)

165−

166−moreThan, atLeast, lessThan, atMost :: x -> Range x

167−moreThan x = NonEmpty (Open x) Infinite

168−atLeast x = NonEmpty (Closed x) Infinite

169−lessThan x = NonEmpty Infinite (Open x)

170−atMost x = NonEmpty Infinite (Closed x)

171−

172−singleton :: x -> Range x

173−singleton x = x <=..<= x

174−

175−whole :: Range x

176−whole = NonEmpty Infinite Infinite

177−

178−(.<@) :: Operator ('NotNull ty) (null ('PGrange ty)) ('Null 'PGbool)

179−(.<@) = unsafeBinaryOp "<@"

180−

181−(@>.) :: Operator (null ('PGrange ty)) ('NotNull ty) ('Null 'PGbool)

182−(@>.) = unsafeBinaryOp "<@"

183−

184−(<<@) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) ('Null 'PGbool)

185−(<<@) = unsafeBinaryOp "<<"

186−

187−(@>>) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) ('Null 'PGbool)

188−(@>>) = unsafeBinaryOp ">>"

189−

190−(&<) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) ('Null 'PGbool)

191−(&<) = unsafeBinaryOp "&<"

192−

193−(&>) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) ('Null 'PGbool)

194−(&>) = unsafeBinaryOp "&>"

195−

196−(-|-) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) ('Null 'PGbool)

197−(-|-) = unsafeBinaryOp "-|-"

198−

199−(@+) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) (null ('PGrange ty))

200−(@+) = unsafeBinaryOp "+"

201−

202−(@*) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) (null ('PGrange ty))

203−(@*) = unsafeBinaryOp "*"

204−

205−(@-) :: Operator (null ('PGrange ty)) (null ('PGrange ty)) (null ('PGrange ty))

206−(@-) = unsafeBinaryOp "-"

207−

208−lowerBound :: null ('PGrange ty) --> 'Null ty

209−lowerBound = unsafeFunction "lower"

210−

211−upperBound :: null ('PGrange ty) --> 'Null ty

212−upperBound = unsafeFunction "upper"

213−

214−isEmpty :: null ('PGrange ty) --> 'Null 'PGbool

215−isEmpty = unsafeFunction "isempty"

216−

217−lowerInc :: null ('PGrange ty) --> 'Null 'PGbool

218−lowerInc = unsafeFunction "lower_inc"

219−

220−lowerInf :: null ('PGrange ty) --> 'Null 'PGbool

221−lowerInf = unsafeFunction "lower_inf"

222−

223−upperInc :: null ('PGrange ty) --> 'Null 'PGbool

224−upperInc = unsafeFunction "upper_inc"

225−

226−upperInf :: null ('PGrange ty) --> 'Null 'PGbool

227−upperInf = unsafeFunction "upper_inf"

228−

229−rangeMerge :: '[null ('PGrange ty), null ('PGrange ty)] ---> null ('PGrange ty)

230−rangeMerge = unsafeFunctionN "range_merge"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Set.hs → squeal-postgresql/src/Squeal/PostgreSQL/Expression/SetOf.hsrenamed+24−57

@@ -1,5 +1,5 @@

11{-|

2−Module: Squeal.PostgreSQL.Expression.Set

2+Module: Squeal.PostgreSQL.Expression.SetOf

33Description: Set returning functions

44Copyright: (c) Eitan Chatav, 2019

55Maintainer: eitan@morphism.tech

@@ -20,18 +20,14 @@ Set returning functions

2020 , TypeOperators

2121#-}

2222

23−module Squeal.PostgreSQL.Expression.Set

23+module Squeal.PostgreSQL.Expression.SetOf

2424 ( generateSeries

2525 , generateSeriesStep

2626 , generateSeriesTimestamp

27− , SetFunction

28− , unsafeSetFunction

29− , SetFunctionDB

30− , setFunction

31− , SetFunctionN

32− , unsafeSetFunctionN

33− , SetFunctionNDB

34− , setFunctionN

27+ , SetOfFunction

28+ , unsafeSetOfFunction

29+ , SetOfFunctionN

30+ , unsafeSetOfFunctionN

3531 ) where

3632

3733import GHC.TypeLits

@@ -48,75 +44,46 @@ import Squeal.PostgreSQL.Schema

4844{- |

4945A @RankNType@ for set returning functions with 1 argument.

5046-}

51−type SetFunction fun ty row

47+type SetOfFunction fun ty setof

5248 = forall outer commons schemas params

5349 . Expression outer commons 'Ungrouped schemas params '[] ty

5450 -- ^ input

55− -> FromClause outer commons schemas params '[fun ::: row]

56− -- ^ output

57−

58−type SetFunctionDB fun schemas ty row

59− = forall outer commons params

60− . Expression outer commons 'Ungrouped schemas params '[] ty

61− -- ^ input

62− -> FromClause outer commons schemas params '[fun ::: row]

51+ -> FromClause outer commons schemas params '[fun ::: setof]

6352 -- ^ output

6453

6554-- | Escape hatch for a set returning function with 1 argument.

66−unsafeSetFunction

67− :: forall fun ty row. KnownSymbol fun

68− => SetFunction fun ty row -- ^ set returning function

69−unsafeSetFunction x = UnsafeFromClause $

55+unsafeSetOfFunction

56+ :: forall fun ty setof. KnownSymbol fun

57+ => SetOfFunction fun ty setof -- ^ set returning function

58+unsafeSetOfFunction x = UnsafeFromClause $

7059 renderSymbol @fun <> parenthesized (renderSQL x)

7160

72−setFunction

73− :: ( Has sch schemas schema

74− , Has fun schema ('Function ('[ty] :=> 'ReturnsTable row)) )

75− => QualifiedAlias sch fun

76− -> SetFunctionDB fun schemas ty row

77−setFunction _ = unsafeSetFunction

78−

7961{- |

8062A @RankNType@ for set returning functions with multiple argument.

8163-}

82−type SetFunctionN fun tys row

64+type SetOfFunctionN fun tys setof

8365 = forall outer commons schemas params

8466 . NP (Expression outer commons 'Ungrouped schemas params '[]) tys

8567 -- ^ inputs

86− -> FromClause outer commons schemas params '[fun ::: row]

68+ -> FromClause outer commons schemas params '[fun ::: setof]

8769 -- ^ output

8870

8971-- | Escape hatch for a set returning function with multiple argument.

90−unsafeSetFunctionN

91− :: forall fun tys row. (SOP.SListI tys, KnownSymbol fun)

92− => SetFunctionN fun tys row -- ^ set returning function

93−unsafeSetFunctionN xs = UnsafeFromClause $

72+unsafeSetOfFunctionN

73+ :: forall fun tys setof. (SOP.SListI tys, KnownSymbol fun)

74+ => SetOfFunctionN fun tys setof -- ^ set returning function

75+unsafeSetOfFunctionN xs = UnsafeFromClause $

9476 renderSymbol @fun <> parenthesized (renderCommaSeparated renderSQL xs)

9577

96−type SetFunctionNDB fun schemas tys row

97− = forall outer commons params

98− . NP (Expression outer commons 'Ungrouped schemas params '[]) tys

99− -- ^ inputs

100− -> FromClause outer commons schemas params '[fun ::: row]

101− -- ^ output

102−

103−setFunctionN

104− :: ( Has sch schemas schema

105− , Has fun schema ('Function (tys :=> 'ReturnsTable row))

106− , SOP.SListI tys )

107− => QualifiedAlias sch fun

108− -> SetFunctionNDB fun schemas tys row

109−setFunctionN _ = unsafeSetFunctionN

110−

11178{- | @generateSeries (start *: stop)@

11279

11380Generate a series of values, from @start@ to @stop@ with a step size of one

11481-}

11582generateSeries

11683 :: ty `In` '[ 'PGint4, 'PGint8, 'PGnumeric]

117− => SetFunctionN "generate_series" '[ null ty, null ty]

84+ => SetOfFunctionN "generate_series" '[ null ty, null ty]

11885 '["generate_series" ::: null ty] -- ^ set returning function

119−generateSeries = unsafeSetFunctionN

86+generateSeries = unsafeSetOfFunctionN

12087

12188{- | @generateSeries (start :* stop *: step)@

12289

@@ -124,9 +91,9 @@ Generate a series of values, from @start@ to @stop@ with a step size of @step@

12491-}

12592generateSeriesStep

12693 :: ty `In` '[ 'PGint4, 'PGint8, 'PGnumeric]

127− => SetFunctionN "generate_series" '[null ty, null ty, null ty]

94+ => SetOfFunctionN "generate_series" '[null ty, null ty, null ty]

12895 '["generate_series" ::: null ty] -- ^ set returning function

129−generateSeriesStep = unsafeSetFunctionN

96+generateSeriesStep = unsafeSetOfFunctionN

13097

13198{- | @generateSeries (start :* stop *: step)@

13299

@@ -134,6 +101,6 @@ Generate a series of values, from @start@ to @stop@ with a step size of @step@

134101-}

135102generateSeriesTimestamp

136103 :: ty `In` '[ 'PGtimestamp, 'PGtimestamptz]

137− => SetFunctionN "generate_series" '[null ty, null ty, null 'PGinterval]

104+ => SetOfFunctionN "generate_series" '[null ty, null ty, null 'PGinterval]

138105 '["generate_series" ::: null ty] -- ^ set returning function

139−generateSeriesTimestamp = unsafeSetFunctionN

106+generateSeriesTimestamp = unsafeSetOfFunctionN

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Text.hs+3−3

@@ -30,17 +30,17 @@ import Squeal.PostgreSQL.Schema

3030

3131-- | >>> printSQL $ lower "ARRRGGG"

3232-- lower(E'ARRRGGG')

33−lower :: null 'PGtext --> null 'PGtext

33+lower :: null 'PGtext :--> null 'PGtext

3434lower = unsafeFunction "lower"

3535

3636-- | >>> printSQL $ upper "eeee"

3737-- upper(E'eeee')

38−upper :: null 'PGtext --> null 'PGtext

38+upper :: null 'PGtext :--> null 'PGtext

3939upper = unsafeFunction "upper"

4040

4141-- | >>> printSQL $ charLength "four"

4242-- char_length(E'four')

43−charLength :: null 'PGtext --> null 'PGint4

43+charLength :: null 'PGtext :--> null 'PGint4

4444charLength = unsafeFunction "char_length"

4545

4646-- | The `like` expression returns true if the @string@ matches

squeal-postgresql/src/Squeal/PostgreSQL/Expression/TextSearch.hs+21−20

@@ -55,8 +55,8 @@ import Squeal.PostgreSQL.Schema

5555(.|) = unsafeBinaryOp "||"

5656

5757-- | negate a `Squeal.PostgreSQL.Expression.Type.tsquery`

58−(.!) :: null 'PGtsquery --> null 'PGtsquery

59−(.!) = unsafeLeftOp "!!"

58+(.!) :: null 'PGtsquery :--> null 'PGtsquery

59+(.!) = unsafeUnaryOpL "!!"

6060

6161-- | `Squeal.PostgreSQL.Expression.Type.tsquery` followed by

6262-- `Squeal.PostgreSQL.Expression.Type.tsquery`

@@ -66,50 +66,51 @@ import Squeal.PostgreSQL.Schema

6666-- | convert array of lexemes to `Squeal.PostgreSQL.Expression.Type.tsvector`

6767arrayToTSvector

6868 :: null ('PGvararray ('NotNull 'PGtext))

69− --> null 'PGtsvector

69+ :--> null 'PGtsvector

7070arrayToTSvector = unsafeFunction "array_to_tsvector"

7171

7272-- | number of lexemes in `Squeal.PostgreSQL.Expression.Type.tsvector`

73−tsvectorLength :: null 'PGtsvector --> null 'PGint4

73+tsvectorLength :: null 'PGtsvector :--> null 'PGint4

7474tsvectorLength = unsafeFunction "length"

7575

7676-- | number of lexemes plus operators in `Squeal.PostgreSQL.Expression.Type.tsquery`

77−numnode :: null 'PGtsquery --> null 'PGint4

77+numnode :: null 'PGtsquery :--> null 'PGint4

7878numnode = unsafeFunction "numnode"

7979

8080-- | produce `Squeal.PostgreSQL.Expression.Type.tsquery` ignoring punctuation

81−plainToTSquery :: null 'PGtext --> null 'PGtsquery

81+plainToTSquery :: null 'PGtext :--> null 'PGtsquery

8282plainToTSquery = unsafeFunction "plainto_tsquery"

8383

8484-- | produce `Squeal.PostgreSQL.Expression.Type.tsquery` that searches for a phrase,

8585-- ignoring punctuation

86−phraseToTSquery :: null 'PGtext --> null 'PGtsquery

86+phraseToTSquery :: null 'PGtext :--> null 'PGtsquery

8787phraseToTSquery = unsafeFunction "phraseto_tsquery"

8888

8989-- | produce `Squeal.PostgreSQL.Expression.Type.tsquery` from a web search style query

90−websearchToTSquery :: null 'PGtext --> null 'PGtsquery

90+websearchToTSquery :: null 'PGtext :--> null 'PGtsquery

9191websearchToTSquery = unsafeFunction "websearch_to_tsquery"

9292

9393-- | get indexable part of a `Squeal.PostgreSQL.Expression.Type.tsquery`

94−queryTree :: null 'PGtsquery --> null 'PGtext

94+queryTree :: null 'PGtsquery :--> null 'PGtext

9595queryTree = unsafeFunction "query_tree"

9696

9797-- | normalize words and convert to `Squeal.PostgreSQL.Expression.Type.tsquery`

98−toTSquery :: null 'PGtext --> null 'PGtsquery

98+toTSquery :: null 'PGtext :--> null 'PGtsquery

9999toTSquery = unsafeFunction "to_tsquery"

100100

101101-- | reduce document text to `Squeal.PostgreSQL.Expression.Type.tsvector`

102102toTSvector

103103 :: ty `In` '[ 'PGtext, 'PGjson, 'PGjsonb]

104− => null ty --> null 'PGtsvector

104+ => null ty :--> null 'PGtsvector

105105toTSvector = unsafeFunction "to_tsvector"

106106

107107-- | assign weight to each element of `Squeal.PostgreSQL.Expression.Type.tsvector`

108−setWeight :: '[null 'PGtsvector, null ('PGchar 1)] ---> null 'PGtsvector

108+setWeight

109+ :: FunctionN '[null 'PGtsvector, null ('PGchar 1)] (null 'PGtsvector)

109110setWeight = unsafeFunctionN "set_weight"

110111

111112-- | remove positions and weights from `Squeal.PostgreSQL.Expression.Type.tsvector`

112−strip :: null 'PGtsvector --> null 'PGtsvector

113+strip :: null 'PGtsvector :--> null 'PGtsvector

113114strip = unsafeFunction "strip"

114115

115116-- | @jsonToTSvector (document *: filter)@

@@ -122,7 +123,7 @@ strip = unsafeFunction "strip"

122123-- "boolean" (to include all Boolean values in the string format "true"/"false"),

123124-- "key" (to include all keys) or "all" (to include all above).

124125-- These values can be combined together to include, e.g. all string and numeric values.

125−jsonToTSvector :: '[null 'PGjson, null 'PGjson] ---> null 'PGtsvector

126+jsonToTSvector :: FunctionN '[null 'PGjson, null 'PGjson] (null 'PGtsvector)

126127jsonToTSvector = unsafeFunctionN "json_to_tsvector"

127128

128129-- | @jsonbToTSvector (document *: filter)@

@@ -135,23 +136,23 @@ jsonToTSvector = unsafeFunctionN "json_to_tsvector"

135136-- "boolean" (to include all Boolean values in the string format "true"/"false"),

136137-- "key" (to include all keys) or "all" (to include all above).

137138-- These values can be combined together to include, e.g. all string and numeric values.

138−jsonbToTSvector :: '[null 'PGjsonb, null 'PGjsonb] ---> null 'PGtsvector

139+jsonbToTSvector :: FunctionN '[null 'PGjsonb, null 'PGjsonb] (null 'PGtsvector)

139140jsonbToTSvector = unsafeFunctionN "jsonb_to_tsvector"

140141

141142-- | remove given lexeme from `Squeal.PostgreSQL.Expression.Type.tsvector`

142−tsDelete ::

143+tsDelete :: FunctionN

143144 '[null 'PGtsvector, null ('PGvararray ('NotNull 'PGtext))]

144− ---> null 'PGtsvector

145+ (null 'PGtsvector)

145146tsDelete = unsafeFunctionN "ts_delete"

146147

147148-- | select only elements with given weights from `Squeal.PostgreSQL.Expression.Type.tsvector`

148−tsFilter ::

149+tsFilter :: FunctionN

149150 '[null 'PGtsvector, null ('PGvararray ('NotNull ('PGchar 1)))]

150− ---> null 'PGtsvector

151+ (null 'PGtsvector)

151152tsFilter = unsafeFunctionN "ts_filter"

152153

153154-- | display a `Squeal.PostgreSQL.Expression.Type.tsquery` match

154155tsHeadline

155156 :: document `In` '[ 'PGtext, 'PGjson, 'PGjsonb]

156− => '[null document, null 'PGtsquery] ---> null 'PGtext

157+ => FunctionN '[null document, null 'PGtsquery] (null 'PGtext)

157158tsHeadline = unsafeFunctionN "ts_headline"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Time.hs+12−7

@@ -17,7 +17,6 @@ Date/Time functions and operators

1717 , OverloadedStrings

1818 , PolyKinds

1919 , RankNTypes

20− , TypeOperators

2120#-}

2221

2322module Squeal.PostgreSQL.Expression.Time

@@ -86,7 +85,9 @@ Create date from year, month and day fields

8685>>> printSQL (makeDate (1984 :* 7 *: 3))

8786make_date(1984, 7, 3)

8887-}

89−makeDate :: '[ null 'PGint4, null 'PGint4, null 'PGint4 ] ---> null 'PGdate

88+makeDate :: FunctionN

89+ '[ null 'PGint4, null 'PGint4, null 'PGint4 ]

90+ ( null 'PGdate )

9091makeDate = unsafeFunctionN "make_date"

9192

9293{-|

@@ -95,7 +96,9 @@ Create time from hour, minute and seconds fields

9596>>> printSQL (makeTime (8 :* 15 *: 23.5))

9697make_time(8, 15, 23.5)

9798-}

98−makeTime :: '[ null 'PGint4, null 'PGint4, null 'PGfloat8 ] ---> null 'PGtime

99+makeTime :: FunctionN

100+ '[ null 'PGint4, null 'PGint4, null 'PGfloat8 ]

101+ ( null 'PGtime )

99102makeTime = unsafeFunctionN "make_time"

100103

101104{-|

@@ -104,9 +107,10 @@ Create timestamp from year, month, day, hour, minute and seconds fields

104107>>> printSQL (makeTimestamp (2013 :* 7 :* 15 :* 8 :* 15 *: 23.5))

105108make_timestamp(2013, 7, 15, 8, 15, 23.5)

106109-}

107−makeTimestamp ::

110+makeTimestamp :: FunctionN

108111 '[ null 'PGint4, null 'PGint4, null 'PGint4

109− , null 'PGint4, null 'PGint4, null 'PGfloat8 ] ---> null 'PGtimestamp

112+ , null 'PGint4, null 'PGint4, null 'PGfloat8 ]

113+ ( null 'PGtimestamp )

110114makeTimestamp = unsafeFunctionN "make_timestamp"

111115

112116{-|

@@ -117,9 +121,10 @@ the current time zone is used

117121>>> printSQL (makeTimestamptz (2013 :* 7 :* 15 :* 8 :* 15 *: 23.5))

118122make_timestamptz(2013, 7, 15, 8, 15, 23.5)

119123-}

120−makeTimestamptz ::

124+makeTimestamptz :: FunctionN

121125 '[ null 'PGint4, null 'PGint4, null 'PGint4

122− , null 'PGint4, null 'PGint4, null 'PGfloat8 ] ---> null 'PGtimestamptz

126+ , null 'PGint4, null 'PGint4, null 'PGfloat8 ]

127+ ( null 'PGtimestamptz )

123128makeTimestamptz = unsafeFunctionN "make_timestamptz"

124129

125130{-|

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Type.hs+5−138

@@ -23,16 +23,14 @@ Type expressions.

2323 , ScopedTypeVariables

2424 , TypeApplications

2525 , TypeOperators

26− , UndecidableInstances

2726#-}

2827

2928module Squeal.PostgreSQL.Expression.Type

30− ( -- * type casting

31− cast

29+ ( TypeExpression (..)

30+ , cast

3231 , astype

3332 , inferredtype

34− -- * type expressions

35− , TypeExpression (..)

33+ , PGTyped (..)

3634 , typedef

3735 , typetable

3836 , typeview

@@ -58,11 +56,9 @@ module Squeal.PostgreSQL.Expression.Type

5856 , bytea

5957 , timestamp

6058 , timestampWithTimeZone

61− , timestamptz

6259 , date

6360 , time

6461 , timeWithTimeZone

65− , timetz

6662 , interval

6763 , uuid

6864 , inet

@@ -73,28 +69,6 @@ module Squeal.PostgreSQL.Expression.Type

7369 , tsvector

7470 , tsquery

7571 , oid

76− , int4range

77− , int8range

78− , numrange

79− , tsrange

80− , tstzrange

81− , daterange

82− -- * column type definitions

83− , ColumnTypeExpression (..)

84− , nullable

85− , notNullable

86− , default_

87− , serial2

88− , smallserial

89− , serial4

90− , serial

91− , serial8

92− , bigserial

93− , hask

94− -- * type inference

95− , PGTyped (..)

96− , PGNullityTyped (..)

97− , FieldTyped (..)

9872 ) where

9973

10074import Control.DeepSeq

@@ -108,7 +82,6 @@ import qualified Generics.SOP as SOP

10882

10983import Squeal.PostgreSQL.Alias

11084import Squeal.PostgreSQL.Expression

111−import Squeal.PostgreSQL.PG

11285import Squeal.PostgreSQL.Render

11386import Squeal.PostgreSQL.Schema

11487

@@ -150,7 +123,6 @@ astype = cast

150123inferredtype

151124 :: PGTyped schemas ty

152125 => Expression outer common grp schemas params from ty

153− -- ^ value

154126 -> Expression outer common grp schemas params from ty

155127inferredtype = astype pgtype

156128

@@ -170,7 +142,6 @@ instance RenderSQL (TypeExpression schemas ty) where

170142typedef

171143 :: (Has sch schemas schema, Has td schema ('Typedef ty))

172144 => QualifiedAlias sch td

173− -- ^ type alias

174145 -> TypeExpression schemas (null ty)

175146typedef = UnsafeTypeExpression . renderSQL

176147

@@ -179,7 +150,6 @@ typedef = UnsafeTypeExpression . renderSQL

179150typetable

180151 :: (Has sch schemas schema, Has tab schema ('Table table))

181152 => QualifiedAlias sch tab

182− -- ^ table alias

183153 -> TypeExpression schemas (null ('PGcomposite (TableToRow table)))

184154typetable = UnsafeTypeExpression . renderSQL

185155

@@ -188,7 +158,6 @@ typetable = UnsafeTypeExpression . renderSQL

188158typeview

189159 :: (Has sch schemas schema, Has vw schema ('View view))

190160 => QualifiedAlias sch vw

191− -- ^ view alias

192161 -> TypeExpression schemas (null ('PGcomposite view))

193162typeview = UnsafeTypeExpression . renderSQL

194163

@@ -245,9 +214,8 @@ bytea = UnsafeTypeExpression "bytea"

245214timestamp :: TypeExpression schemas (null 'PGtimestamp)

246215timestamp = UnsafeTypeExpression "timestamp"

247216-- | date and time, including time zone

248−timestampWithTimeZone, timestamptz :: TypeExpression schemas (null 'PGtimestamptz)

217+timestampWithTimeZone :: TypeExpression schemas (null 'PGtimestamptz)

249218timestampWithTimeZone = UnsafeTypeExpression "timestamp with time zone"

250−timestamptz = UnsafeTypeExpression "timestamptz"

251219-- | calendar date (year, month, day)

252220date :: TypeExpression schemas (null 'PGdate)

253221date = UnsafeTypeExpression "date"

@@ -255,9 +223,8 @@ date = UnsafeTypeExpression "date"

255223time :: TypeExpression schemas (null 'PGtime)

256224time = UnsafeTypeExpression "time"

257225-- | time of day, including time zone

258−timeWithTimeZone, timetz :: TypeExpression schemas (null 'PGtimetz)

226+timeWithTimeZone :: TypeExpression schemas (null 'PGtimetz)

259227timeWithTimeZone = UnsafeTypeExpression "time with time zone"

260−timetz = UnsafeTypeExpression "timetz"

261228-- | time span

262229interval :: TypeExpression schemas (null 'PGinterval)

263230interval = UnsafeTypeExpression "interval"

@@ -308,24 +275,6 @@ tsquery = UnsafeTypeExpression "tsquery"

308275-- as primary keys for various system tables.

309276oid :: TypeExpression schemas (null 'PGoid)

310277oid = UnsafeTypeExpression "oid"

311−-- | Range of integer

312−int4range :: TypeExpression schemas (null ('PGrange 'PGint4))

313−int4range = UnsafeTypeExpression "int4range"

314−-- | Range of bigint

315−int8range :: TypeExpression schemas (null ('PGrange 'PGint8))

316−int8range = UnsafeTypeExpression "int8range"

317−-- | Range of numeric

318−numrange :: TypeExpression schemas (null ('PGrange 'PGnumeric))

319−numrange = UnsafeTypeExpression "numrange"

320−-- | Range of timestamp without time zone

321−tsrange :: TypeExpression schemas (null ('PGrange 'PGtimestamp))

322−tsrange = UnsafeTypeExpression "tsrange"

323−-- | Range of timestamp with time zone

324−tstzrange :: TypeExpression schemas (null ('PGrange 'PGtimestamptz))

325−tstzrange = UnsafeTypeExpression "tstzrange"

326−-- | Range of date

327−daterange :: TypeExpression schemas (null ('PGrange 'PGdate))

328−daterange = UnsafeTypeExpression "daterange"

329278

330279-- | `pgtype` is a demoted version of a `PGType`

331280class PGTyped schemas (ty :: NullityType) where

@@ -362,85 +311,3 @@ instance (SOP.All KnownNat dims, PGTyped schemas ty)

362311instance PGTyped schemas (null 'PGtsvector) where pgtype = tsvector

363312instance PGTyped schemas (null 'PGtsquery) where pgtype = tsquery

364313instance PGTyped schemas (null 'PGoid) where pgtype = oid

365−instance PGTyped schemas (null ('PGrange 'PGint4)) where pgtype = int4range

366−instance PGTyped schemas (null ('PGrange 'PGint8)) where pgtype = int8range

367−instance PGTyped schemas (null ('PGrange 'PGnumeric)) where pgtype = numrange

368−instance PGTyped schemas (null ('PGrange 'PGtimestamp)) where pgtype = tsrange

369−instance PGTyped schemas (null ('PGrange 'PGtimestamptz)) where pgtype = tstzrange

370−instance PGTyped schemas (null ('PGrange 'PGdate)) where pgtype = daterange

371−

372−-- | Lift `PGTyped` to a field

373−class FieldTyped schemas ty where

374− fieldtype :: Aliased (TypeExpression schemas) ty

375−instance (KnownSymbol alias, PGTyped schemas ty)

376− => FieldTyped schemas (alias ::: ty) where

377− fieldtype = pgtype `As` Alias

378−

379−-- | `ColumnTypeExpression`s are used in `createTable` commands.

380−newtype ColumnTypeExpression (schemas :: SchemasType) (ty :: ColumnType)

381− = UnsafeColumnTypeExpression { renderColumnTypeExpression :: ByteString }

382− deriving (GHC.Generic,Show,Eq,Ord,NFData)

383−instance RenderSQL (ColumnTypeExpression schemas ty) where

384− renderSQL = renderColumnTypeExpression

385−

386−-- | used in `createTable` commands as a column constraint to note that

387−-- @NULL@ may be present in a column

388−nullable

389− :: TypeExpression schemas (nullity ty)

390− -> ColumnTypeExpression schemas ('NoDef :=> 'Null ty)

391−nullable ty = UnsafeColumnTypeExpression $ renderSQL ty <+> "NULL"

392−

393−-- | used in `createTable` commands as a column constraint to ensure

394−-- @NULL@ is not present in a column

395−notNullable

396− :: TypeExpression schemas (nullity ty)

397− -> ColumnTypeExpression schemas ('NoDef :=> 'NotNull ty)

398−notNullable ty = UnsafeColumnTypeExpression $ renderSQL ty <+> "NOT NULL"

399−

400−-- | used in `createTable` commands as a column constraint to give a default

401−default_

402− :: Expression '[] '[] 'Ungrouped schemas '[] '[] ty

403− -> ColumnTypeExpression schemas ('NoDef :=> ty)

404− -> ColumnTypeExpression schemas ('Def :=> ty)

405−default_ x ty = UnsafeColumnTypeExpression $

406− renderSQL ty <+> "DEFAULT" <+> renderExpression x

407−

408−-- | not a true type, but merely a notational convenience for creating

409−-- unique identifier columns with type `PGint2`

410−serial2, smallserial

411− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint2)

412−serial2 = UnsafeColumnTypeExpression "serial2"

413−smallserial = UnsafeColumnTypeExpression "smallserial"

414−-- | not a true type, but merely a notational convenience for creating

415−-- unique identifier columns with type `PGint4`

416−serial4, serial

417− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint4)

418−serial4 = UnsafeColumnTypeExpression "serial4"

419−serial = UnsafeColumnTypeExpression "serial"

420−-- | not a true type, but merely a notational convenience for creating

421−-- unique identifier columns with type `PGint8`

422−serial8, bigserial

423− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint8)

424−serial8 = UnsafeColumnTypeExpression "serial8"

425−bigserial = UnsafeColumnTypeExpression "bigserial"

426−

427−-- | Like @PGTyped@ but also accounts for nullity.

428−class PGNullityTyped schemas (nullty :: NullityType) where

429− pgNullityType :: ColumnTypeExpression schemas ('NoDef :=> nullty)

430−

431−instance PGTyped schemas ('Null ty) => PGNullityTyped schemas ('Null ty) where

432− pgNullityType = nullable (pgtype @_ @('Null ty))

433−

434−instance PGTyped schemas ('NotNull ty) => PGNullityTyped schemas ('NotNull ty) where

435− pgNullityType = notNullable (pgtype @_ @('NotNull ty))

436−

437−-- | Allow you to specify pg column types in relation to haskell types.

438−-- >>> printSQL $ hask @(Maybe String)

439−-- text NULL

440−--

441−-- >>> printSQL $ hask @Double

442−-- float8 NOT NULL

443−hask

444− :: forall hask schemas. PGNullityTyped schemas (NullPG hask)

445− => ColumnTypeExpression schemas ('NoDef :=> NullPG hask)

446−hask = pgNullityType

squeal-postgresql/src/Squeal/PostgreSQL/List.hs+45−16

@@ -33,16 +33,16 @@ module Squeal.PostgreSQL.List

3333 , Join

3434 , disjoin

3535 , Additional (..)

36− , Path (..)

37− , CFunctor (..)

38− , CFoldable (..)

39− , CFree (..)

36+ , AlignedList (..)

37+ , single

38+ , extractList

39+ , mapAligned

4040 , Elem

4141 , In

4242 , Length

4343 ) where

4444

45−import Control.Category.Free

45+import Control.Category

4646import Data.Function ((&))

4747import Data.Kind

4848import Data.Type.Bool

@@ -50,6 +50,8 @@ import GHC.TypeLits

5050

5151import Generics.SOP as SOP

5252

53+import Squeal.PostgreSQL.Render

54+

5355-- | `Join` is simply promoted `++` and is used in @JOIN@s in

5456-- `Squeal.PostgreSQL.Query.FromClause`s.

5557type family Join xs ys where

@@ -76,6 +78,42 @@ instance Additional (NP expr) where

7678 Nil -> ys

7779 x :* xs -> x :* (xs & also ys)

7880

81+-- | An `AlignedList` is a type-aligned list or free category.

82+data AlignedList p x0 x1 where

83+ Done :: AlignedList p x x

84+ (:>>) :: p x0 x1 -> AlignedList p x1 x2 -> AlignedList p x0 x2

85+infixr 7 :>>

86+instance Category (AlignedList p) where

87+ id = Done

88+ (.) list = \case

89+ Done -> list

90+ step :>> steps -> step :>> (steps >>> list)

91+instance (forall t0 t1. RenderSQL (p t0 t1))

92+ => RenderSQL (AlignedList p x0 x1) where

93+ renderSQL = \case

94+ Done -> ""

95+ step :>> Done -> renderSQL step

96+ step :>> steps -> renderSQL step <> ", " <> renderSQL steps

97+

98+-- | `extractList` turns an `AlignedList` into a standard list.

99+extractList :: (forall a0 a1. p a0 a1 -> b) -> AlignedList p x0 x1 -> [b]

100+extractList f = \case

101+ Done -> []

102+ step :>> steps -> (f step):extractList f steps

103+

104+-- | `mapAligned` applies a function to each element of an `AlignedList`.

105+mapAligned

106+ :: (forall z0 z1. p z0 z1 -> q z0 z1)

107+ -> AlignedList p x0 x1

108+ -> AlignedList q x0 x1

109+mapAligned f = \case

110+ Done -> Done

111+ x :>> xs -> f x :>> mapAligned f xs

112+

113+-- | A `single` step.

114+single :: p x0 x1 -> AlignedList p x0 x1

115+single step = step :>> Done

116+

79117-- | A useful operator for ending an `NP` list of length at least 2 without `Nil`.

80118(*:) :: f x -> f y -> NP f '[x,y]

81119x *: y = x :* y :* Nil

@@ -84,12 +122,7 @@ infixl 9 *:

84122-- | @Elem@ is a promoted `Data.List.elem`.

85123type family Elem x xs where

86124 Elem x '[] = 'False

87− Elem x (x ': _) = 'True

88− Elem x (_ ': x ': _) = 'True

89− Elem x (_ ': _ ': x ': _) = 'True

90− Elem x (_ ': _ ': _ ': x ': _) = 'True

91− Elem x (_ ': _ ': _ ': _ ': x ': _) = 'True

92− Elem x (_ ': _ ': _ ': _ ': _ ': x ': _) = 'True

125+ Elem x (x ': xs) = 'True

93126 Elem x (_ ': xs) = Elem x xs

94127

95128-- | @In x xs@ is a constraint that proves that @x@ is in @xs@.

@@ -104,9 +137,5 @@ Length '[Char,String,Bool,Double] :: Nat

104137= 4

105138-}

106139type family Length (xs :: [k]) :: Nat where

107− Length (_ ': _ ': _ ': _ ': _ : xs) = 5 + Length xs

108− Length (_ ': _ ': _ ': _ : xs) = 4 + Length xs

109− Length (_ ': _ ': _ : xs) = 3 + Length xs

110− Length (_ ': _ : xs) = 2 + Length xs

111− Length (_ : xs) = 1 + Length xs

140+ Length (x : xs) = 1 + Length xs

112141 Length '[] = 0

squeal-postgresql/src/Squeal/PostgreSQL/Manipulation.hs+24−33

@@ -99,7 +99,7 @@ instance RenderSQL (Manipulation commons schemas params columns) where

9999instance With Manipulation where

100100 with Done manip = manip

101101 with ctes manip = UnsafeManipulation $

102− "WITH" <+> commaSeparated (ctoList renderSQL ctes) <+> renderSQL manip

102+ "WITH" <+> renderSQL ctes <+> renderSQL manip

103103

104104{- |

105105The top level `Manipulation_` type is parameterized by a @schemas@ `SchemasType`,

@@ -249,7 +249,6 @@ type family Manipulation_ (schemas :: SchemasType) (params :: Type) (row :: Type

249249-- | Convert a `Query` into a `Manipulation`.

250250queryStatement

251251 :: Query '[] commons schemas params columns

252− -- ^ `Query` to embed as a `Manipulation`

253252 -> Manipulation commons schemas params columns

254253queryStatement q = UnsafeManipulation $ renderSQL q

255254

@@ -272,13 +271,9 @@ insertInto

272271 , SOP.SListI columns

273272 , SOP.SListI row1 )

274273 => QualifiedAlias sch tab

275− -- ^ table

276274 -> QueryClause commons schemas params columns

277− -- ^ what to insert

278275 -> ConflictClause tab commons schemas params table

279− -- ^ what to do in case of conflict

280276 -> ReturningClause commons schemas params '[tab ::: row0] row1

281− -- ^ what to return

282277 -> Manipulation commons schemas params row1

283278insertInto tab qry conflict ret = UnsafeManipulation $

284279 "INSERT" <+> "INTO" <+> renderSQL tab

@@ -286,7 +281,7 @@ insertInto tab qry conflict ret = UnsafeManipulation $

286281 <> renderSQL conflict

287282 <> renderSQL ret

288283

289−-- | Like `insertInto` but with `OnConflictDoRaise` and `no` `ReturningClause`.

284+-- | Like `insertInto` but with `OnConflictDoRaise` and no `ReturningClause`.

290285insertInto_

291286 :: ( Has sch schemas schema

292287 , Has tab schema ('Table table)

@@ -294,33 +289,30 @@ insertInto_

294289 , row ~ TableToRow table

295290 , SOP.SListI columns )

296291 => QualifiedAlias sch tab

297− -- ^ table

298292 -> QueryClause commons schemas params columns

299− -- ^ what to insert

300293 -> Manipulation commons schemas params '[]

301294insertInto_ tab qry =

302295 insertInto tab qry OnConflictDoRaise (Returning_ Nil)

303296

304297-- | A `QueryClause` describes what to `insertInto` a table.

305298data QueryClause commons schemas params columns where

299+ -- | `Values` describes `NP` lists of `Aliased` `Optional` `Expression`s

300+ -- whose `ColumnsType` must match the tables'.

306301 Values

307302 :: SOP.SListI columns

308303 => NP (Aliased (Optional (Expression '[] commons 'Ungrouped schemas params '[]))) columns

309− -- ^ row of values

310304 -> [NP (Aliased (Optional (Expression '[] commons 'Ungrouped schemas params '[]))) columns]

311− -- ^ additional rows of values

312305 -> QueryClause commons schemas params columns

306+ -- | `Select` describes a subquery that permits use of `Optional` `Expression`s.

313307 Select

314308 :: SOP.SListI columns

315309 => NP (Aliased (Optional (Expression '[] commons grp schemas params from))) columns

316− -- ^ row of values

317310 -> TableExpression '[] commons grp schemas params from

318− -- ^ from a table expression

319311 -> QueryClause commons schemas params columns

312+ -- | `Subquery` describes a subquery whose `RowType` must match the tables'.

320313 Subquery

321314 :: ColumnsToRow columns ~ row

322315 => Query '[] commons schemas params row

323− -- ^ subquery to insert

324316 -> QueryClause commons schemas params columns

325317

326318instance RenderSQL (QueryClause commons schemas params columns) where

@@ -358,7 +350,6 @@ instance RenderSQL (QueryClause commons schemas params columns) where

358350pattern Values_

359351 :: SOP.SListI columns

360352 => NP (Aliased (Optional (Expression '[] commons 'Ungrouped schemas params '[]))) columns

361− -- ^ row of values

362353 -> QueryClause commons schemas params columns

363354pattern Values_ vals = Values vals []

364355

@@ -383,7 +374,7 @@ instance (forall x. RenderSQL (expr x)) => RenderSQL (Optional expr ty) where

383374-- deleted will be returned. For example, if a row was locked

384375-- but not updated because an `OnConflict` `DoUpdate` condition was not satisfied,

385376-- the row will not be returned. `Returning` `Star` will return all columns

386−-- in the row. Use `Returning` `Nil` in the common case where no return

377+-- in the row. Use @Returning Nil@ in the common case where no return

387378-- values are desired.

388379newtype ReturningClause commons schemas params from row =

389380 Returning (Selection '[] commons 'Ungrouped schemas params from row)

@@ -397,7 +388,6 @@ instance RenderSQL (ReturningClause commons schemas params from row) where

397388pattern Returning_

398389 :: SOP.SListI row

399390 => NP (Aliased (Expression '[] commons 'Ungrouped schemas params from)) row

400− -- ^ row of values

401391 -> ReturningClause commons schemas params from row

402392pattern Returning_ list = Returning (List list)

403393

@@ -410,9 +400,7 @@ data ConflictClause tab commons schemas params table where

410400 OnConflictDoRaise :: ConflictClause tab commons schemas params table

411401 OnConflict

412402 :: ConflictTarget constraints

413− -- ^ conflict target

414403 -> ConflictAction tab commons schemas params columns

415− -- ^ conflict action

416404 -> ConflictClause tab commons schemas params (constraints :=> columns)

417405

418406-- | Render a `ConflictClause`.

@@ -430,12 +418,12 @@ the exact details of the `update` action to be performed in case of a conflict.

430418The `Set` and WHERE `Condition`s in `OnConflict` `DoUpdate` have access to the

431419existing row using the table's name (or an alias), and to rows proposed

432420for insertion using the special @#excluded@ table.

433−`OnConflict` `DoNothing` simply avoids inserting a row as its alternative action.

434−`OnConflict` `DoUpdate` updates the existing row that conflicts

435−with the row proposed for insertion as its alternative action.

436421-}

437422data ConflictAction tab commons schemas params columns where

423+ -- | `OnConflict` `DoNothing` simply avoids inserting a row as its alternative action.

438424 DoNothing :: ConflictAction tab commons schemas params columns

425+ -- | `OnConflict` `DoUpdate` updates the existing row that conflicts

426+ -- with the row proposed for insertion as its alternative action.

439427 DoUpdate

440428 :: ( row ~ ColumnsToRow columns

441429 , SOP.SListI columns

@@ -485,6 +473,7 @@ UPDATE statements

485473update

486474 :: ( SOP.SListI columns

487475 , SOP.SListI row1

476+ , db ~ (commons :=> schemas)

488477 , Has sch schemas schema

489478 , Has tab schema ('Table table)

490479 , row0 ~ TableToRow table

@@ -509,6 +498,7 @@ update tab columns wh returning = UnsafeManipulation $

509498-- | Update a row returning `Nil`.

510499update_

511500 :: ( SOP.SListI columns

501+ , db ~ (commons :=> schemas)

512502 , Has sch schemas schema

513503 , Has tab schema ('Table table)

514504 , row ~ TableToRow table

@@ -527,25 +517,25 @@ update_ tab columns wh = update tab columns wh (Returning_ Nil)

527517DELETE statements

528518-----------------------------------------}

529519

530−-- | Specify additional tables with `Using`

531−-- an `also` list of table expressions, allowing columns

532−-- from other tables to appear in the WHERE condition.

533−-- This is similar to the list of tables that can be specified

534−-- in the FROM Clause of a SELECT statement;

535−-- for example, an alias for the table name can be specified.

536−-- Do not repeat the target table in the `Using` list,

537−-- unless you wish to set up a self-join.

538−-- `NoUsing` if no additional tables are to be used.

520+-- | Specify additional tables.

539521data UsingClause commons schemas params from where

522+ -- | No `UsingClause`

540523 NoUsing :: UsingClause commons schemas params '[]

524+ -- | An `also` list of table expressions, allowing columns

525+ -- from other tables to appear in the WHERE condition.

526+ -- This is similar to the list of tables that can be specified

527+ -- in the FROM Clause of a SELECT statement;

528+ -- for example, an alias for the table name can be specified.

529+ -- Do not repeat the target table in the `Using` list,

530+ -- unless you wish to set up a self-join.

541531 Using

542532 :: FromClause '[] commons schemas params from

543− -- ^ what to use

544533 -> UsingClause commons schemas params from

545534

546535-- | Delete rows from a table.

547536deleteFrom

548537 :: ( SOP.SListI row1

538+ , db ~ (commons :=> schemas)

549539 , Has sch schemas schema

550540 , Has tab schema ('Table table)

551541 , row0 ~ TableToRow table

@@ -567,7 +557,8 @@ deleteFrom tab using wh returning = UnsafeManipulation $

567557

568558-- | Delete rows returning `Nil`.

569559deleteFrom_

570− :: ( Has sch schemas schema

560+ :: ( db ~ (commons :=> schemas)

561+ , Has sch schemas schema

571562 , Has tab schema ('Table table)

572563 , row ~ TableToRow table

573564 , columns ~ TableToColumns table )

squeal-postgresql/src/Squeal/PostgreSQL/Migration.hs+12−14

@@ -66,7 +66,7 @@ let

6666 }

6767:}

6868

69−Now that we have a couple migrations we can chain them together into a `Path`.

69+Now that we have a couple migrations we can chain them together into an `AlignedList`.

7070

7171>>> let migrations = makeUsers :>> makeEmails :>> Done

7272

@@ -167,8 +167,6 @@ import qualified GHC.Generics as GHC

167167import Squeal.PostgreSQL.Alias

168168import Squeal.PostgreSQL.Binary

169169import Squeal.PostgreSQL.Definition

170−import Squeal.PostgreSQL.Definition.Table

171−import Squeal.PostgreSQL.Definition.Table.Constraint

172170import Squeal.PostgreSQL.Expression.Comparison

173171import Squeal.PostgreSQL.Expression.Parameter

174172import Squeal.PostgreSQL.Expression.Time

@@ -192,34 +190,34 @@ data Migration p schemas0 schemas1 = Migration

192190

193191{- |

194192A `Migratory` @p@ is a `Category` for which one can execute or rewind

195−a `Path` of `Migration`s over @p@. This includes the category of pure

193+an `AlignedList` of `Migration`s over @p@. This includes the category of pure

196194SQL `Definition`s and the category of impure `Terminally` `PQ` `IO` actions.

197195-}

198196class Category p => Migratory p where

199197

200198 {- |

201− Run a `Path` of `Migration`s.

199+ Run an `AlignedList` of `Migration`s.

202200 Create the `MigrationsTable` as @public.schema_migrations@ if it does not already exist.

203201 In one transaction, for each each `Migration` query to see if the `Migration` has been executed;

204202 if not, `up` the `Migration` and insert its `name` in the `MigrationsTable`.

205203 -}

206204 migrateUp

207− :: Path (Migration p) schemas0 schemas1

205+ :: AlignedList (Migration p) schemas0 schemas1

208206 -> PQ schemas0 schemas1 IO ()

209207

210208 {- |

211− Rewind a `Path` of `Migration`s.

209+ Rewind an `AlignedList` of `Migration`s.

212210 Create the `MigrationsTable` as @public.schema_migrations@ if it does not already exist.

213211 In one transaction, for each each `Migration` query to see if the `Migration` has been executed;

214212 if so, `down` the `Migration` and delete its `name` in the `MigrationsTable`.

215213 -}

216214 migrateDown

217− :: Path (Migration p) schemas0 schemas1

215+ :: AlignedList (Migration p) schemas0 schemas1

218216 -> PQ schemas1 schemas0 IO ()

219217

220218instance Migratory Definition where

221− migrateUp = migrateUp . cmap pureMigration

222− migrateDown = migrateDown . cmap pureMigration

219+ migrateUp = migrateUp . mapAligned pureMigration

220+ migrateDown = migrateDown . mapAligned pureMigration

223221

224222{- | `Terminally` turns an indexed monad transformer and the monad it transforms

225223into a category by restricting the return type to @()@ and permuting the type variables.

@@ -268,7 +266,7 @@ instance Migratory (Terminally PQ IO) where

268266 where

269267

270268 upMigrations

271− :: Path (Migration (Terminally PQ IO)) schemas0 schemas1

269+ :: AlignedList (Migration (Terminally PQ IO)) schemas0 schemas1

272270 -> PQ MigrationsSchemas MigrationsSchemas IO ()

273271 upMigrations = \case

274272 Done -> return ()

@@ -297,7 +295,7 @@ instance Migratory (Terminally PQ IO) where

297295 where

298296

299297 downMigrations

300− :: Path (Migration (Terminally PQ IO)) schemas0 schemas1

298+ :: AlignedList (Migration (Terminally PQ IO)) schemas0 schemas1

301299 -> PQ MigrationsSchemas MigrationsSchemas IO ()

302300 downMigrations = \case

303301 Done -> return ()

@@ -384,7 +382,7 @@ defaultMain

384382 :: Migratory p

385383 => ByteString

386384 -- ^ connection string

387− -> Path (Migration p) db0 db1

385+ -> AlignedList (Migration p) db0 db1

388386 -- ^ migrations

389387 -> IO ()

390388defaultMain connectTo migrations = do

@@ -405,7 +403,7 @@ defaultMain connectTo migrations = do

405403 migrateStatus :: PQ schema schema IO ()

406404 migrateStatus = unsafePQ $ do

407405 runNames <- getRunMigrationNames

408− let names = ctoList name migrations

406+ let names = extractList name migrations

409407 unrunNames = names \\ runNames

410408 liftIO $ displayRunned runNames >> displayUnrunned unrunNames

411409

squeal-postgresql/src/Squeal/PostgreSQL/PG.hs+13−23

@@ -22,8 +22,8 @@ Stability: experimental

2222 , FunctionalDependencies

2323 , GADTs

2424 , LambdaCase

25− , MultiParamTypeClasses

2625 , OverloadedStrings

26+ , MultiParamTypeClasses

2727 , ScopedTypeVariables

2828 , TypeApplications

2929 , TypeFamilies

@@ -47,7 +47,7 @@ module Squeal.PostgreSQL.PG

4747 , Enumerated (..)

4848 , VarArray (..)

4949 , FixArray (..)

50− , LibPQ.Oid (..)

50+ , Oid (..)

5151 -- * Type families

5252 , LabelsPG

5353 , DimPG

@@ -66,6 +66,7 @@ import Data.Int (Int16, Int32, Int64)

6666import Data.Scientific (Scientific)

6767import Data.Time (Day, DiffTime, LocalTime, TimeOfDay, TimeZone, UTCTime)

6868import Data.Vector (Vector)

69+import Data.Word (Word32)

6970import Data.UUID.Types (UUID)

7071import GHC.TypeLits

7172import Network.IP.Addr (NetAddr, IP)

@@ -74,7 +75,6 @@ import qualified Data.ByteString.Lazy as Lazy (ByteString)

7475import qualified Data.ByteString as Strict (ByteString)

7576import qualified Data.Text.Lazy as Lazy (Text)

7677import qualified Data.Text as Strict (Text)

77−import qualified Database.PostgreSQL.LibPQ as LibPQ

7878import qualified GHC.Generics as GHC

7979import qualified Generics.SOP as SOP

8080import qualified Generics.SOP.Record as SOP

@@ -108,7 +108,7 @@ type instance PG Int32 = 'PGint4

108108-- | `PGint8`

109109type instance PG Int64 = 'PGint8

110110-- | `PGint2`

111−type instance PG LibPQ.Oid = 'PGoid

111+type instance PG Oid = 'PGoid

112112-- | `PGnumeric`

113113type instance PG Scientific = 'PGnumeric

114114-- | `PGfloat4`

@@ -178,16 +178,8 @@ type family RowPG (hask :: Type) :: RowType where

178178

179179-- | `RowOf` applies `NullPG` to the fields of a list.

180180type family RowOf (record :: [(Symbol, Type)]) :: RowType where

181− RowOf (col ::: ty ': col1 ::: ty1 ': col2 ::: ty2 ': col3 ::: ty3 ': col4 ::: ty4 ': record) =

182− col ::: NullPG ty ': col1 ::: NullPG ty1 ': col2 ::: NullPG ty2 ': col3 ::: NullPG ty3 ': col4 ::: NullPG ty4 ': RowOf record

183− RowOf (col ::: ty ': col1 ::: ty1 ': col2 ::: ty2 ': col3 ::: ty3 ': record) =

184− col ::: NullPG ty ': col1 ::: NullPG ty1 ': col2 ::: NullPG ty2 ': col3 ::: NullPG ty3 ': RowOf record

185− RowOf (col ::: ty ': col1 ::: ty1 ': col2 ::: ty2 ': record) =

186− col ::: NullPG ty ': col1 ::: NullPG ty1 ': col2 ::: NullPG ty2 ': RowOf record

187− RowOf (col ::: ty ': col1 ::: ty1 ': record) =

188− col ::: NullPG ty ': col1::: NullPG ty1 ': RowOf record

189− RowOf (col ::: ty ': record) = col ::: NullPG ty ': RowOf record

190181 RowOf '[] = '[]

182+ RowOf (col ::: ty ': record) = col ::: NullPG ty ': RowOf record

191183

192184{- | `NullPG` turns a Haskell type into a `NullityType`.

193185

@@ -214,17 +206,8 @@ type family TuplePG (hask :: Type) :: [NullityType] where

214206

215207-- | `TupleOf` turns a list of Haskell `Type`s into a list of `NullityType`s.

216208type family TupleOf (tuple :: [Type]) :: [NullityType] where

217− TupleOf (hask ': hask1 ': hask2 ': hask3 ': hask4 ': hask5 ': tuple) =

218− NullPG hask ': NullPG hask1 ': NullPG hask2 ': NullPG hask3 ': NullPG hask4 ': NullPG hask5 ': TupleOf tuple

219− TupleOf (hask ': hask1 ': hask2 ': hask3 ': hask4 ': tuple) =

220− NullPG hask ': NullPG hask1 ': NullPG hask2 ': NullPG hask3 ': NullPG hask4 ': TupleOf tuple

221− TupleOf (hask ': hask1 ': hask2 ': hask3 ': tuple) =

222− NullPG hask ': NullPG hask1 ': NullPG hask2 ': NullPG hask3 ': TupleOf tuple

223− TupleOf (hask ': hask1 ': hask2 ': tuple) =

224− NullPG hask ': NullPG hask1 ': NullPG hask2 ': TupleOf tuple

225− TupleOf (hask ': hask1 ': tuple) = NullPG hask ': NullPG hask1 ': TupleOf tuple

226− TupleOf (hask ': tuple) = NullPG hask ': TupleOf tuple

227209 TupleOf '[] = '[]

210+ TupleOf (hask ': tuple) = NullPG hask ': TupleOf tuple

228211

229212-- | `TupleCodeOf` takes the `SOP.Code` of a haskell `Type`

230213-- and if it's a simple product returns it, otherwise giving a `TypeError`.

@@ -386,3 +369,10 @@ newtype FixArray arr = FixArray {getFixArray :: arr}

386369 deriving anyclass (SOP.HasDatatypeInfo, SOP.Generic)

387370-- | `PGfixarray` @(@`DimPG` @hask) (@`FixPG` @hask)@

388371type instance PG (FixArray hask) = 'PGfixarray (DimPG hask) (FixPG hask)

372+

373+{- | Object identifiers (`Oid`s) are used internally by PostgreSQL

374+as primary keys for various system tables.

375+-}

376+newtype Oid = Oid { getOid :: Word32 }

377+ deriving stock (Eq, Ord, Show, Read, GHC.Generic)

378+ deriving anyclass (SOP.HasDatatypeInfo, SOP.Generic)

squeal-postgresql/src/Squeal/PostgreSQL/PQ.hs+18−42

@@ -78,7 +78,6 @@ import UnliftIO (MonadUnliftIO (..), bracket, catch, handle, try)

7878import Data.ByteString (ByteString)

7979import Data.Foldable

8080import Data.Function ((&))

81−import Data.Functor ((<&>))

8281import Data.Kind

8382import Data.Text (pack, Text)

8483import Data.Traversable

@@ -87,7 +86,6 @@ import PostgreSQL.Binary.Encoding (encodingBytes)

8786

8887import qualified Control.Monad.Fail as Fail

8988import qualified Database.PostgreSQL.LibPQ as LibPQ

90−import qualified PostgreSQL.Binary.Encoding as Encoding

9189

9290import Squeal.PostgreSQL.Binary

9391import Squeal.PostgreSQL.Definition

@@ -317,13 +315,13 @@ a default instance.

317315-}

318316class Monad pq => MonadPQ schemas pq | pq -> schemas where

319317 manipulateParams

320− :: (ToParams x params, All OidOfParam params)

318+ :: ToParams x params

321319 => Manipulation '[] schemas params ys

322320 -- ^ `insertInto`, `update` or `deleteFrom`

323321 -> x -> pq (K LibPQ.Result ys)

324322 default manipulateParams

325323 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

326− => (ToParams x params, All OidOfParam params)

324+ => ToParams x params

327325 => Manipulation '[] schemas params ys

328326 -- ^ `insertInto`, `update` or `deleteFrom`

329327 -> x -> pq (K LibPQ.Result ys)

@@ -331,7 +329,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

331329 manipulateParams manipulation params

332330

333331 manipulateParams_

334− :: (ToParams x params, All OidOfParam params)

332+ :: ToParams x params

335333 => Manipulation '[] schemas params '[]

336334 -- ^ `insertInto`, `update` or `deleteFrom`

337335 -> x -> pq ()

@@ -344,7 +342,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

344342 manipulate_ = void . manipulate

345343

346344 runQueryParams

347− :: (ToParams x params, All OidOfParam params)

345+ :: ToParams x params

348346 => Query '[] '[] schemas params ys

349347 -- ^ `select` and friends

350348 -> x -> pq (K LibPQ.Result ys)

@@ -357,19 +355,19 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

357355 runQuery q = runQueryParams q ()

358356

359357 traversePrepared

360− :: (ToParams x params, Traversable list, All OidOfParam params)

358+ :: (ToParams x params, Traversable list)

361359 => Manipulation '[] schemas params ys

362360 -- ^ `insertInto`, `update`, or `deleteFrom`, and friends

363361 -> list x -> pq (list (K LibPQ.Result ys))

364362 default traversePrepared

365363 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

366− => (ToParams x params, Traversable list, All OidOfParam params)

364+ => (ToParams x params, Traversable list)

367365 => Manipulation '[] schemas params ys -> list x -> pq (list (K LibPQ.Result ys))

368366 traversePrepared manipulation params = lift $

369367 traversePrepared manipulation params

370368

371369 forPrepared

372− :: (ToParams x params, Traversable list, All OidOfParam params)

370+ :: (ToParams x params, Traversable list)

373371 => list x

374372 -> Manipulation '[] schemas params ys

375373 -- ^ `insertInto`, `update` or `deleteFrom`

@@ -377,13 +375,13 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

377375 forPrepared = flip traversePrepared

378376

379377 traversePrepared_

380− :: (ToParams x params, Foldable list, All OidOfParam params)

378+ :: (ToParams x params, Foldable list)

381379 => Manipulation '[] schemas params '[]

382380 -- ^ `insertInto`, `update` or `deleteFrom`

383381 -> list x -> pq ()

384382 default traversePrepared_

385383 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

386− => (ToParams x params, Foldable list, All OidOfParam params)

384+ => (ToParams x params, Foldable list)

387385 => Manipulation '[] schemas params '[]

388386 -- ^ `insertInto`, `update` or `deleteFrom`

389387 -> list x -> pq ()

@@ -391,7 +389,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

391389 traversePrepared_ manipulation params

392390

393391 forPrepared_

394− :: (ToParams x params, Foldable list, All OidOfParam params)

392+ :: (ToParams x params, Foldable list)

395393 => list x

396394 -> Manipulation '[] schemas params '[]

397395 -- ^ `insertInto`, `update` or `deleteFrom`

@@ -411,17 +409,9 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

411409 (UnsafeManipulation q :: Manipulation '[] schemas ps ys) (params :: x) =

412410 PQ $ \ (K conn) -> do

413411 let

414− paramSet

415− :: forall param. OidOfParam param

416− => K (Maybe Encoding.Encoding) param

417− -> K (Maybe (LibPQ.Oid, ByteString, LibPQ.Format)) param

418− paramSet (K maybeEncoding) = K $

419− maybeEncoding <&> \encoding ->

420− (oidOfParam @param, encodingBytes encoding, LibPQ.Binary)

421− params'

422− = hcollapse

423− . hcmap (Proxy @OidOfParam) paramSet

424− $ toParams @x @ps params

412+ toParam' encoding =

413+ (LibPQ.invalidOid, encodingBytes encoding, LibPQ.Binary)

414+ params' = fmap (fmap toParam') (hcollapse (toParams @x @ps params))

425415 q' = q <> ";"

426416 resultMaybe <- liftIO $ LibPQ.execParams conn q' params' LibPQ.Binary

427417 case resultMaybe of

@@ -434,22 +424,15 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

434424 traversePrepared

435425 (UnsafeManipulation q :: Manipulation '[] schemas xs ys) (list :: list x) =

436426 PQ $ \ (K conn) -> liftIO $ do

437− let

438− temp = "temporary_statement"

439− paramOid :: forall p. OidOfParam p => K LibPQ.Oid p

440− paramOid = K (oidOfParam @p)

441− paramOids :: NP (K LibPQ.Oid) xs

442− paramOids = hcpure (Proxy @OidOfParam) paramOid

443− paramOids' :: [LibPQ.Oid]

444− paramOids' = hcollapse paramOids

445− prepResultMaybe <- LibPQ.prepare conn temp q (Just paramOids')

427+ let temp = "temporary_statement"

428+ prepResultMaybe <- LibPQ.prepare conn temp q Nothing

446429 case prepResultMaybe of

447430 Nothing -> throw $ ResultException

448431 "traversePrepared: LibPQ.prepare returned no results"

449432 Just prepResult -> okResult_ prepResult

450433 results <- for list $ \ params -> do

451434 let

452− toParam' encoding = (encodingBytes encoding, LibPQ.Binary)

435+ toParam' encoding = (encodingBytes encoding,LibPQ.Binary)

453436 params' = fmap (fmap toParam') (hcollapse (toParams @x @xs params))

454437 resultMaybe <- LibPQ.execPrepared conn temp params' LibPQ.Binary

455438 case resultMaybe of

@@ -468,15 +451,8 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

468451 traversePrepared_

469452 (UnsafeManipulation q :: Manipulation '[] schemas xs '[]) (list :: list x) =

470453 PQ $ \ (K conn) -> liftIO $ do

471− let

472− temp = "temporary_statement"

473− paramOid :: forall p. OidOfParam p => K LibPQ.Oid p

474− paramOid = K (oidOfParam @p)

475− paramOids :: NP (K LibPQ.Oid) xs

476− paramOids = hcpure (Proxy @OidOfParam) paramOid

477− paramOids' :: [LibPQ.Oid]

478− paramOids' = hcollapse paramOids

479− prepResultMaybe <- LibPQ.prepare conn temp q (Just paramOids')

454+ let temp = "temporary_statement"

455+ prepResultMaybe <- LibPQ.prepare conn temp q Nothing

480456 case prepResultMaybe of

481457 Nothing -> throw $ ResultException

482458 "traversePrepared_: LibPQ.prepare returned no results"

squeal-postgresql/src/Squeal/PostgreSQL/Query.hs+22−74

@@ -39,8 +39,6 @@ module Squeal.PostgreSQL.Query

3939 , select_

4040 , selectDistinct

4141 , selectDistinct_

42− , selectDistinctOn

43− , selectDistinctOn_

4442 , Selection (..)

4543 -- ** Values

4644 , values

@@ -554,9 +552,9 @@ select_ = select . List

554552-- be subject to the elimination of duplicate rows using `selectDistinct`.

555553selectDistinct

556554 :: (SListI columns, columns ~ (col ': cols))

557− => Selection outer commons grp schemas params from columns

555+ => Selection outer commons 'Ungrouped schemas params from columns

558556 -- ^ selection

559− -> TableExpression outer commons grp schemas params from

557+ -> TableExpression outer commons 'Ungrouped schemas params from

560558 -- ^ intermediate virtual table

561559 -> Query outer commons schemas params columns

562560selectDistinct selection tabexpr = UnsafeQuery $

@@ -568,62 +566,13 @@ selectDistinct selection tabexpr = UnsafeQuery $

568566-- of a general `Selection`.

569567selectDistinct_

570568 :: (SListI columns, columns ~ (col ': cols))

571− => NP (Aliased (Expression outer commons grp schemas params from)) columns

569+ => NP (Aliased (Expression outer commons 'Ungrouped schemas params from)) columns

572570 -- ^ select list

573− -> TableExpression outer commons grp schemas params from

571+ -> TableExpression outer commons 'Ungrouped schemas params from

574572 -- ^ intermediate virtual table

575573 -> Query outer commons schemas params columns

576574selectDistinct_ = selectDistinct . List

577575

578−{-|

579−`selectDistinctOn` keeps only the first row of each set of rows where

580−the given expressions evaluate to equal. The DISTINCT ON expressions are

581−interpreted using the same rules as for ORDER BY. ORDER BY is used to

582−ensure that the desired row appears first.

583−

584−The DISTINCT ON expression(s) must match the leftmost ORDER BY expression(s).

585−The ORDER BY clause will normally contain additional expression(s) that

586−determine the desired precedence of rows within each DISTINCT ON group.

587−

588−In order to guarantee they match and reduce redundancy, this function

589−will prepend the The DISTINCT ON expressions to the ORDER BY clause.

590−-}

591−selectDistinctOn

592− :: (SListI columns, columns ~ (col ': cols))

593− => [SortExpression outer commons grp schemas params from]

594− -- ^ DISTINCT ON expression(s) and prepended to ORDER BY clause

595− -> Selection outer commons grp schemas params from columns

596− -- ^ selection

597− -> TableExpression outer commons grp schemas params from

598− -- ^ intermediate virtual table

599− -> Query outer commons schemas params columns

600−selectDistinctOn distincts selection tab = UnsafeQuery $

601− "SELECT DISTINCT ON"

602− <+> parenthesized (commaSeparated (renderDistinctOn <$> distincts))

603− <+> renderSQL selection

604− <+> renderSQL (tab {orderByClause = distincts <> orderByClause tab})

605− where

606− renderDistinctOn = \case

607− Asc expression -> renderSQL expression

608− Desc expression -> renderSQL expression

609− AscNullsFirst expression -> renderSQL expression

610− DescNullsFirst expression -> renderSQL expression

611− AscNullsLast expression -> renderSQL expression

612− DescNullsLast expression -> renderSQL expression

613−

614−-- | Like `selectDistinctOn` but takes an `NP` list of `Expression`s instead

615−-- of a general `Selection`.

616−selectDistinctOn_

617− :: (SListI columns, columns ~ (col ': cols))

618− => [SortExpression outer commons grp schemas params from]

619− -- ^ distinct on and return the first row in ordering

620− -> NP (Aliased (Expression outer commons grp schemas params from)) columns

621− -- ^ selection

622− -> TableExpression outer commons grp schemas params from

623− -- ^ intermediate virtual table

624− -> Query outer commons schemas params columns

625−selectDistinctOn_ distincts = selectDistinctOn distincts . List

626−

627576-- | `values` computes a row value or set of row values

628577-- specified by value expressions. It is most commonly used

629578-- to generate a “constant table” within a larger command,

@@ -757,7 +706,7 @@ instance RenderSQL (TableExpression outer commons grp schemas params from) where

757706from

758707 :: FromClause outer commons schemas params from -- ^ table reference

759708 -> TableExpression outer commons 'Ungrouped schemas params from

760−from tab = TableExpression tab [] noGroups NoHaving [] [] []

709+from tab = TableExpression tab [] NoGroups NoHaving [] [] []

761710

762711-- | A `where_` is an endomorphism of `TableExpression`s which adds a

763712-- search condition to the `whereClause`.

@@ -778,7 +727,7 @@ groupBy

778727groupBy bys rels = TableExpression

779728 { fromClause = fromClause rels

780729 , whereClause = whereClause rels

781− , groupByClause = group bys

730+ , groupByClause = Group bys

782731 , havingClause = Having []

783732 , orderByClause = []

784733 , limitClause = limitClause rels

@@ -992,20 +941,19 @@ instance (Has rel rels cols, Has col cols ty, bys ~ '[ '(rel, col)])

992941-- done on @NoGroups@ while all output `Expression`s must be aggregated

993942-- in @Group Nil@. In general, all output `Expression`s in the

994943-- complement of @bys@ must be aggregated in @Group bys@.

995−newtype GroupByClause grp from = UnsafeGroupByClause

996− { renderGroupByClause :: ByteString }

997− deriving (GHC.Generic,Show,Eq,Ord,NFData)

944+data GroupByClause grp from where

945+ NoGroups :: GroupByClause 'Ungrouped from

946+ Group

947+ :: SListI bys

948+ => NP (By from) bys

949+ -> GroupByClause ('Grouped bys) from

950+

951+-- | Renders a `GroupByClause`.

998952instance RenderSQL (GroupByClause grp from) where

999− renderSQL = renderGroupByClause

1000−noGroups :: GroupByClause 'Ungrouped from

1001−noGroups = UnsafeGroupByClause ""

1002−group

1003− :: SListI bys

1004− => NP (By from) bys

1005− -> GroupByClause ('Grouped bys) from

1006−group bys = UnsafeGroupByClause $ case bys of

1007− Nil -> ""

1008− bys' -> " GROUP BY" <+> renderCommaSeparated renderSQL bys'

953+ renderSQL = \case

954+ NoGroups -> ""

955+ Group Nil -> ""

956+ Group bys -> " GROUP BY" <+> renderCommaSeparated renderSQL bys

1009957

1010958-- | A `HavingClause` is used to eliminate groups that are not of interest.

1011959-- An `Ungrouped` `TableExpression` may only use `NoHaving` while a `Grouped`

@@ -1049,8 +997,8 @@ instance

1049997 , commons1 ~ (cte ::: common ': commons)

1050998 ) => Aliasable cte

1051999 (statement commons schemas params common)

1052− (Path (CommonTableExpression statement schemas params) commons commons1) where

1053− statement `as` cte = csingleton (statement `as` cte)

1000+ (AlignedList (CommonTableExpression statement schemas params) commons commons1) where

1001+ statement `as` cte = single (statement `as` cte)

10541002

10551003instance (forall c s p r. RenderSQL (statement c s p r)) => RenderSQL

10561004 (CommonTableExpression statement schemas params commons0 commons1) where

@@ -1062,7 +1010,7 @@ instance (forall c s p r. RenderSQL (statement c s p r)) => RenderSQL

10621010-- defining temporary tables that exist just for one query.

10631011class With statement where

10641012 with

1065− :: Path (CommonTableExpression statement schemas params) commons0 commons1

1013+ :: AlignedList (CommonTableExpression statement schemas params) commons0 commons1

10661014 -- ^ common table expressions

10671015 -> statement commons1 schemas params row

10681016 -- ^ larger query

@@ -1070,7 +1018,7 @@ class With statement where

10701018instance With (Query outer) where

10711019 with Done query = query

10721020 with ctes query = UnsafeQuery $

1073− "WITH" <+> commaSeparated (ctoList renderSQL ctes) <+> renderSQL query

1021+ "WITH" <+> renderSQL ctes <+> renderSQL query

10741022

10751023{- |

10761024>>> import Data.Monoid (Sum (..))

squeal-postgresql/src/Squeal/PostgreSQL/Schema.hs+10−156

@@ -44,10 +44,6 @@ module Squeal.PostgreSQL.Schema

4444 , ColumnsType

4545 , TableType

4646 , SchemumType (..)

47− , IndexType (..)

48− , FunctionType

49− , OperatorType (..)

50− , ReturnsType (..)

5147 , SchemaType

5248 , SchemasType

5349 , Public

@@ -62,16 +58,9 @@ module Squeal.PostgreSQL.Schema

6258 , PGlabel (..)

6359 -- * Data Definitions

6460 , Create

65− , CreateIfNotExists

66− , CreateOrReplace

6761 , Drop

68− , DropSchemum

69− , DropIfExists

70− , DropSchemumIfExists

7162 , Alter

72− , AlterIfExists

7363 , Rename

74− , RenameIfExists

7564 , ConstraintInvolves

7665 , DropIfConstraintsInvolve

7766 , IsNotElem

@@ -143,9 +132,8 @@ data PGType

143132 | PGenum [Symbol] -- ^ enumerated (enum) types are data types that comprise a static, ordered set of values.

144133 | PGcomposite RowType -- ^ a composite type represents the structure of a row or record; it is essentially just a list of field names and their data types.

145134 | PGtsvector -- ^ A tsvector value is a sorted list of distinct lexemes, which are words that have been normalized to merge different variants of the same word.

146− | PGtsquery -- ^ A tsquery value stores lexemes that are to be searched for.

135+ | PGtsquery -- ^ A tsquery value stores lexemes that are to be searched for

147136 | PGoid -- Object identifiers (OIDs) are used internally by PostgreSQL as primary keys for various system tables.

148− | PGrange PGType -- ^ Range types are data types representing a range of values of some element type (called the range's subtype).

149137 | UnsafePGType Symbol -- ^ an escape hatch for unsupported PostgreSQL types

150138

151139-- | `NullityType` encodes the potential presence or definite absence of a

@@ -260,19 +248,9 @@ type FromType = [(Symbol,RowType)]

260248

261249-- | `ColumnsToRow` removes column constraints.

262250type family ColumnsToRow (columns :: ColumnsType) :: RowType where

263− ColumnsToRow (column ::: _ :=> ty ': column1 ::: _ :=> ty1 ': column2 ::: _ :=> ty2 ': column3 ::: _ :=> ty3 ': column4 ::: _ :=> ty4 ': column5 ::: _ :=> ty5 ': columns) =

264− column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': column4 ::: ty4 ': column5 ::: ty5 ': ColumnsToRow columns

265− ColumnsToRow (column ::: _ :=> ty ': column1 ::: _ :=> ty1 ': column2 ::: _ :=> ty2 ': column3 ::: _ :=> ty3 ': column4 ::: _ :=> ty4 ': columns) =

266− column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': column4 ::: ty4 ': ColumnsToRow columns

267− ColumnsToRow (column ::: _ :=> ty ': column1 ::: _ :=> ty1 ': column2 ::: _ :=> ty2 ': column3 ::: _ :=> ty3 ': columns) =

268− column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': ColumnsToRow columns

269− ColumnsToRow (column ::: _ :=> ty ': column1 ::: _ :=> ty1 ': column2 ::: _ :=> ty2 ': columns) =

270− column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': ColumnsToRow columns

271− ColumnsToRow (column ::: _ :=> ty ': column1 ::: _ :=> ty1 ': columns) =

272− column ::: ty ': column1 ::: ty1 ': ColumnsToRow columns

273− ColumnsToRow (column ::: _ :=> ty ': columns) =

274− column ::: ty ': ColumnsToRow columns

275251 ColumnsToRow '[] = '[]

252+ ColumnsToRow (column ::: constraint :=> ty ': columns) =

253+ column ::: ty ': ColumnsToRow columns

276254

277255-- | `TableToColumns` removes table constraints.

278256type family TableToColumns (table :: TableType) :: ColumnsType where

@@ -305,24 +283,14 @@ instance ty0 ~ ty1 => SamePGType

305283

306284-- | `AllNotNull` is a constraint that proves a `ColumnsType` has no @NULL@s.

307285type family AllNotNull (columns :: ColumnsType) :: Constraint where

308− AllNotNull (_ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

309− AllNotNull (_ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

310− AllNotNull (_ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

311− AllNotNull (_ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

312− AllNotNull (_ ::: _ :=> 'NotNull _ ': _ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

313− AllNotNull (_ ::: _ :=> 'NotNull _ ': columns) = AllNotNull columns

314286 AllNotNull '[] = ()

287+ AllNotNull (column ::: def :=> 'NotNull ty ': columns) = AllNotNull columns

315288

316289-- | `NotAllNull` is a constraint that proves a `ColumnsType` has some

317290-- @NOT NULL@.

318291type family NotAllNull (columns :: ColumnsType) :: Constraint where

319− NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

320− NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

321− NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

322− NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

323− NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

324− NotAllNull (_ ::: _ :=> 'NotNull _ ': _) = ()

325− NotAllNull (_ ::: _ :=> 'Null _ ': columns) = NotAllNull columns

292+ NotAllNull (column ::: def :=> 'NotNull ty ': columns) = ()

293+ NotAllNull (column ::: def :=> 'Null ty ': columns) = NotAllNull columns

326294

327295-- | `NullifyType` is an idempotent that nullifies a `NullityType`.

328296type family NullifyType (ty :: NullityType) :: NullityType where

@@ -331,37 +299,17 @@ type family NullifyType (ty :: NullityType) :: NullityType where

331299

332300-- | `NullifyRow` is an idempotent that nullifies a `RowType`.

333301type family NullifyRow (columns :: RowType) :: RowType where

334− NullifyRow (column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': column4 ::: ty4 ': column5 ::: ty5 ': columns) =

335− column ::: NullifyType ty ': column1 ::: NullifyType ty1 ': column2 ::: NullifyType ty2 ': column3 ::: NullifyType ty3 ': column4 ::: NullifyType ty4 ': column5 ::: NullifyType ty5 ': NullifyRow columns

336− NullifyRow (column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': column4 ::: ty4 ': columns) =

337− column ::: NullifyType ty ': column1 ::: NullifyType ty1 ': column2 ::: NullifyType ty2 ': column3 ::: NullifyType ty3 ': column4 ::: NullifyType ty4 ': NullifyRow columns

338− NullifyRow (column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': column3 ::: ty3 ': columns) =

339− column ::: NullifyType ty ': column1 ::: NullifyType ty1 ': column2 ::: NullifyType ty2 ': column3 ::: NullifyType ty3 ': NullifyRow columns

340− NullifyRow (column ::: ty ': column1 ::: ty1 ': column2 ::: ty2 ': columns) =

341− column ::: NullifyType ty ': column1 ::: NullifyType ty1 ': column2 ::: NullifyType ty2 ': NullifyRow columns

342− NullifyRow (column ::: ty ': column1 ::: ty1 ': columns) =

343− column ::: NullifyType ty ': column1 ::: NullifyType ty1 ': NullifyRow columns

302+ NullifyRow '[] = '[]

344303 NullifyRow (column ::: ty ': columns) =

345304 column ::: NullifyType ty ': NullifyRow columns

346− NullifyRow '[] = '[]

347305

348306-- | `NullifyFrom` is an idempotent that nullifies a `FromType`

349307-- used to nullify the left or right hand side of an outer join

350308-- in a `Squeal.PostgreSQL.Query.FromClause`.

351309type family NullifyFrom (tables :: FromType) :: FromType where

352− NullifyFrom (table ::: columns ': table1 ::: columns1 ': table2 ::: columns2 ': table3 ::: columns3 ': table4 ::: columns4 ': table5 ::: columns5 ': tables) =

353− table ::: NullifyRow columns ': table1 ::: NullifyRow columns1 ': table2 ::: NullifyRow columns2 ': table3 ::: NullifyRow columns3 ': table4 ::: NullifyRow columns5 ': table5 ::: NullifyRow columns4 ': NullifyFrom tables

354− NullifyFrom (table ::: columns ': table1 ::: columns1 ': table2 ::: columns2 ': table3 ::: columns3 ': table4 ::: columns4 ': tables) =

355− table ::: NullifyRow columns ': table1 ::: NullifyRow columns1 ': table2 ::: NullifyRow columns2 ': table3 ::: NullifyRow columns3 ': table4 ::: NullifyRow columns4 ': NullifyFrom tables

356− NullifyFrom (table ::: columns ': table1 ::: columns1 ': table2 ::: columns2 ': table3 ::: columns3 ': tables) =

357− table ::: NullifyRow columns ': table1 ::: NullifyRow columns1 ': table2 ::: NullifyRow columns2 ': table3 ::: NullifyRow columns3 ': NullifyFrom tables

358− NullifyFrom (table ::: columns ': table1 ::: columns1 ': table2 ::: columns2 ': tables) =

359− table ::: NullifyRow columns ': table1 ::: NullifyRow columns1 ': table2 ::: NullifyRow columns2 ': NullifyFrom tables

360− NullifyFrom (table ::: columns ': table1 ::: columns1 ': tables) =

361− table ::: NullifyRow columns ': table1 ::: NullifyRow columns1 ': NullifyFrom tables

310+ NullifyFrom '[] = '[]

362311 NullifyFrom (table ::: columns ': tables) =

363312 table ::: NullifyRow columns ': NullifyFrom tables

364− NullifyFrom '[] = '[]

365313

366314-- | @Create alias x xs@ adds @alias ::: x@ to the end of @xs@ and is used in

367315-- `Squeal.PostgreSQL.Definition.createTable` statements and in @ALTER TABLE@

@@ -371,101 +319,30 @@ type family Create alias x xs where

371319 Create alias x (alias ::: y ': xs) = TypeError

372320 ('Text "Create: alias "

373321 ':<>: 'ShowType alias

374− ':<>: 'Text "already exists")

322+ ':<>: 'Text "already in use")

375323 Create alias y (x ': xs) = x ': Create alias y xs

376324

377−type family CreateIfNotExists alias x xs where

378− CreateIfNotExists alias x '[] = '[alias ::: x]

379− CreateIfNotExists alias x (alias ::: y ': xs) = alias ::: y ': xs

380− CreateIfNotExists alias y (x ': xs) = x ': CreateIfNotExists alias y xs

381−

382−type family CreateOrReplace alias x xs where

383− CreateOrReplace alias x '[] = '[alias ::: x]

384− CreateOrReplace alias x (alias ::: x ': xs) = alias ::: x ': xs

385− CreateOrReplace alias x (alias ::: y ': xs) = TypeError

386− ('Text "CreateOrReplace: expected type "

387− ':<>: 'ShowType x

388− ':<>: 'Text " but alias "

389− ':<>: 'ShowType alias

390− ':<>: 'Text " has type "

391− ':<>: 'ShowType y)

392− CreateOrReplace alias y (x ': xs) = x ': CreateOrReplace alias y xs

393−

394325-- | @Drop alias xs@ removes the type associated with @alias@ in @xs@

395326-- and is used in `Squeal.PostgreSQL.Definition.dropTable` statements

396327-- and in @ALTER TABLE@ `Squeal.PostgreSQL.Definition.dropColumn` statements.

397328type family Drop alias xs where

398− Drop alias '[] = TypeError

399− ('Text "Drop: alias "

400− ':<>: 'ShowType alias

401− ':<>: 'Text " does not exist" )

402− Drop alias (alias ::: x ': xs) = xs

329+ Drop alias ((alias ::: x) ': xs) = xs

403330 Drop alias (x ': xs) = x ': Drop alias xs

404331

405−type family DropSchemum alias sch xs where

406− DropSchemum alias sch '[] = TypeError

407− ('Text "DropSchemum: alias "

408− ':<>: 'ShowType alias

409− ':<>: 'Text " does not exist" )

410− DropSchemum alias sch (alias ::: sch x ': xs) = xs

411− DropSchemum alias sch0 (alias ::: sch1 x ': xs) = TypeError

412− ('Text "DropSchemum: expected schemum "

413− ':<>: 'ShowType sch0

414− ':<>: 'Text " but alias "

415− ':<>: 'ShowType alias

416− ':<>: 'Text " has schemum "

417− ':<>: 'ShowType sch1)

418− DropSchemum alias sch (x ': xs) = x ': DropSchemum alias sch xs

419−

420−type family DropIfExists alias xs where

421− DropIfExists alias '[] = '[]

422− DropIfExists alias (alias ::: x ': xs) = xs

423− DropIfExists alias (x ': xs) = x ': DropIfExists alias xs

424−

425−type family DropSchemumIfExists alias sch xs where

426− DropSchemumIfExists alias sch '[] = '[]

427− DropSchemumIfExists alias sch (alias ::: sch x ': xs) = xs

428− DropSchemumIfExists alias sch0 (alias ::: sch1 x ': xs) = TypeError

429− ('Text "DropSchemumIfExists: expected schemum "

430− ':<>: 'ShowType sch1

431− ':<>: 'Text " but alias "

432− ':<>: 'ShowType alias

433− ':<>: 'Text " has schemum "

434− ':<>: 'ShowType sch0)

435− DropSchemumIfExists alias sch (x ': xs) = x ': DropSchemumIfExists alias sch xs

436−

437332-- | @Alter alias x xs@ replaces the type associated with an @alias@ in @xs@

438333-- with the type @x@ and is used in `Squeal.PostgreSQL.Definition.alterTable`

439334-- and `Squeal.PostgreSQL.Definition.alterColumn`.

440335type family Alter alias x xs where

441− Alter alias x '[] = TypeError

442− ('Text "Alter: alias "

443− ':<>: 'ShowType alias

444− ':<>: 'Text " does not exist" )

445336 Alter alias x1 (alias ::: x0 ': xs) = alias ::: x1 ': xs

446337 Alter alias x1 (x0 ': xs) = x0 ': Alter alias x1 xs

447338

448−type family AlterIfExists alias x xs where

449− AlterIfExists alias x '[] = '[]

450− AlterIfExists alias x1 (alias ::: x0 ': xs) = alias ::: x1 ': xs

451− AlterIfExists alias x1 (x0 ': xs) = x0 ': AlterIfExists alias x1 xs

452−

453339-- | @Rename alias0 alias1 xs@ replaces the alias @alias0@ by @alias1@ in @xs@

454340-- and is used in `Squeal.PostgreSQL.Definition.alterTableRename` and

455341-- `Squeal.PostgreSQL.Definition.renameColumn`.

456342type family Rename alias0 alias1 xs where

457− Rename alias0 alias1 '[] = TypeError

458− ('Text "Rename: alias "

459− ':<>: 'ShowType alias0

460− ':<>: 'Text " does not exist" )

461343 Rename alias0 alias1 ((alias0 ::: x0) ': xs) = (alias1 ::: x0) ': xs

462344 Rename alias0 alias1 (x ': xs) = x ': Rename alias0 alias1 xs

463345

464−type family RenameIfExists alias0 alias1 xs where

465− RenameIfExists alias x '[] = '[]

466− RenameIfExists alias0 alias1 ((alias0 ::: x0) ': xs) = (alias1 ::: x0) ': xs

467− RenameIfExists alias0 alias1 (x ': xs) = x ': RenameIfExists alias0 alias1 xs

468−

469346-- | Check if a `TableConstraint` involves a column

470347type family ConstraintInvolves column constraint where

471348 ConstraintInvolves column ('Check columns) = column `Elem` columns

@@ -488,29 +365,6 @@ data SchemumType

488365 = Table TableType

489366 | View RowType

490367 | Typedef PGType

491− | Index IndexType

492− | Function FunctionType

493− | Operator OperatorType

494− | UnsafeSchemum Symbol

495−

496−type FunctionType = ([NullityType], ReturnsType)

497−

498−data IndexType

499− = Btree

500− | Hash

501− | Gist

502− | Spgist

503− | Gin

504− | Brin

505−

506−data ReturnsType

507− = Returns NullityType

508− | ReturnsTable RowType

509−

510−data OperatorType

511− = BinaryOp NullityType NullityType NullityType

512− | LeftOp NullityType NullityType

513− | RightOp NullityType NullityType

514368

515369{- | The schema of a database consists of a list of aliased,

516370user-defined `SchemumType`s.

squeal-postgresql/test/Doc.hsdeleted−6

@@ -1,6 +0,0 @@

1−module Main (main) where

2−

3−import Test.DocTest

4−

5−main :: IO ()

6−main = doctest [ "-isrc", "src" ]

squeal-postgresql/test/DocTest.hsnew file+18

@@ -0,0 +1,18 @@

1+module Main (main) where

3+import Test.DocTest

5+main :: IO ()

6+main = doctest

7+ [ "-isrc"

8+ , "src/Squeal/PostgreSQL.hs"

9+ , "src/Squeal/PostgreSQL/Binary.hs"

10+ , "src/Squeal/PostgreSQL/Definition.hs"

11+ , "src/Squeal/PostgreSQL/Manipulation.hs"

12+ , "src/Squeal/PostgreSQL/Query.hs"

13+ , "src/Squeal/PostgreSQL/Expression.hs"

14+ , "src/Squeal/PostgreSQL/PQ.hs"

15+ , "src/Squeal/PostgreSQL/Migration.hs"

16+ , "src/Squeal/PostgreSQL/Transaction.hs"

17+ , "src/Squeal/PostgreSQL/Pool.hs"

18+ ]

squeal-postgresql/test/Property.hsdeleted−166

@@ -1,166 +0,0 @@

1−{-# LANGUAGE

2− DataKinds

3− , GADTs

4− , LambdaCase

5− , OverloadedLabels

6− , OverloadedStrings

7− , TypeApplications

8− , TypeOperators

9−#-}

10−

11−module Main (main) where

12−

13−import Control.Monad.Trans

14−import Data.ByteString (ByteString)

15−import Data.ByteString.Char8 (unpack)

16−import Data.Scientific (fromFloatDigits)

17−import Data.Fixed (Fixed(MkFixed), Micro, Pico)

18−import Data.String (IsString(fromString))

19−import Data.Time

20−import Squeal.PostgreSQL hiding (check, defaultMain, Group)

21−import Hedgehog hiding (Range)

22−import qualified Hedgehog.Gen as Gen

23−import qualified Hedgehog.Main as Main

24−import qualified Hedgehog.Range as Range

25−

26−main :: IO ()

27−main = Main.defaultMain [checkSequential roundtrips]

28−

29−roundtrips :: Group

30−roundtrips = Group "roundtrips"

31− [ roundtrip int2 genInt16

32− , roundtrip int4 genInt32

33− , roundtrip int8 genInt64

34− , roundtrip bool Gen.bool

35− , roundtrip numeric genScientific

36− , roundtrip float4 genFloat

37− , roundtrip float8 genDouble

38− , roundtripOn normalizeTimeOfDay time genTimeOfDay

39− -- , roundtrip timetz genTimeWithZone normalizeTimeWithZone

40− , roundtripOn normalizeLocalTime timestamp genLocalTime

41− , roundtrip timestamptz genUTCTime

42− , roundtrip date genDay

43− , roundtrip interval genDiffTime

44− , roundtripOn normalizeIntRange int4range (genRange genInt32)

45− , roundtripOn normalizeIntRange int8range (genRange genInt64)

46− , roundtrip numrange (genRange genScientific)

47− , roundtripOn (fmap normalizeLocalTime) tsrange (genRange genLocalTime)

48− , roundtrip tstzrange (genRange genUTCTime)

49− , roundtripOn normalizeIntRange daterange (genRange genDay)

50− ]

51− where

52− genInt16 = Gen.int16 Range.exponentialBounded

53− genInt32 = Gen.int32 Range.exponentialBounded

54− genInt64 = Gen.int64 Range.exponentialBounded

55− genScientific = fromFloatDigits <$> genFloat

56− genPosFloat = Gen.float

57− (Range.exponentialFloatFrom 1 minPosFloat maxPosFloat)

58− genFloat = Gen.prune $ Gen.choice

59− [ genPosFloat

60− , negate <$> genPosFloat

61− , Gen.element [0,1/0] ]

62− genPosDouble = Gen.double

63− (Range.exponentialFloatFrom 1 minPosFloat maxPosFloat)

64− genDouble = Gen.prune $ Gen.choice

65− [ genPosDouble

66− , negate <$> genPosDouble

67− , Gen.element [0,1/0] ]

68− genRange gen = do

69− lb <- gen

70− ub <- Gen.filter (lb <) gen

71− Gen.element

72− [ Empty, singleton lb, whole

73− , lb <=..<= ub , lb <=..< ub, lb <..<= ub, lb <..< ub

74− , atLeast lb, moreThan lb, atMost ub, lessThan ub ]

75− genDay = do

76− y <- toInteger <$> Gen.int (Range.constant 2000 2019)

77− m <- Gen.int (Range.constant 1 12)

78− d <- Gen.int (Range.constant 1 28)

79− return $ fromGregorian y m d

80− genDiffTime = secondsToDiffTime . toInteger <$>

81− Gen.int (Range.constant 0 86401)

82− genUTCTime = UTCTime <$> genDay <*> genDiffTime

83− genTimeOfDay = do

84− h <- Gen.int (Range.constant 0 23)

85− m <- Gen.int (Range.constant 0 59)

86− s <- MkFixed . toInteger <$> Gen.int (Range.constant 0 59)

87− return $ TimeOfDay h m s

88− genLocalTime = LocalTime <$> genDay <*> genTimeOfDay

89− -- genTimeZone = Gen.element $ map (read @TimeZone)

90− -- [ "UTC", "UT", "GMT", "EST", "EDT", "CST"

91− -- , "CDT", "MST", "MDT", "PST", "PDT" ]

92− -- genTimeWithZone = (,) <$> genTimeOfDay <*> genTimeZone

93−

94−roundtrip

95− :: (OidOf ty, ToParam x ty, FromValue ty x, Show x, Eq x)

96− => TypeExpression schemas ('NotNull ty)

97− -> Gen x

98− -> (PropertyName, Property)

99−roundtrip = roundtripOn id

100−

101−roundtripOn

102− :: (OidOf ty, ToParam x ty, FromValue ty x, Show x, Eq x)

103− => (x -> x)

104− -> TypeExpression schemas ('NotNull ty)

105− -> Gen x

106− -> (PropertyName, Property)

107−roundtripOn norm ty gen = propertyWithName $ do

108− x <- forAll gen

109− Just (Only y) <- lift . withConnection connectionString $

110− firstRow =<< runQueryParams

111− (values_ (parameter @1 ty `as` #fromOnly)) (Only x)

112− norm x === y

113− where

114− propertyWithName prop =

115− (fromString (unpack (renderSQL ty)), property prop)

116−

117−maxPosFloat :: RealFloat a => a

118−maxPosFloat = x

119− where

120− n = floatDigits x

121− b = floatRadix x

122− (_, u) = floatRange x

123− x = encodeFloat (b^n - 1) (u - n)

124−

125−minPosFloat :: RealFloat a => a

126−minPosFloat = x

127− where

128− n = floatDigits x

129− b = floatRadix x

130− (l, _) = floatRange x

131− x = encodeFloat (b^n - 1) (l - n - 1)

132−

133−connectionString :: ByteString

134−connectionString = "host=localhost port=5432 dbname=exampledb"

135−

136−normalizeIntRange :: (Enum int, Ord int) => Range int -> Range int

137−normalizeIntRange = \case

138− Empty -> Empty

139− NonEmpty l u ->

140− let

141− l' = normalizeL l

142− u' = normalizeU u

143− in if emptyNormalized l' u' then Empty else NonEmpty l' u'

144− where

145− normalizeL = \case

146− Open l -> Closed (succ l)

147− normalized -> normalized

148− normalizeU = \case

149− Closed u -> Open (succ u)

150− normalized -> normalized

151− emptyNormalized (Closed l) (Open u) = l >= u

152− emptyNormalized _ _ = False

153−

154−normalizeTimeOfDay :: TimeOfDay -> TimeOfDay

155−normalizeTimeOfDay (TimeOfDay h m s) = TimeOfDay h m

156− . fromRational @Pico

157− . toRational @Micro

158− . fromRational @Micro

159− . toRational @Pico

160− $ s

161−

162−normalizeLocalTime :: LocalTime -> LocalTime

163−normalizeLocalTime (LocalTime d t) = LocalTime d (normalizeTimeOfDay t)

164−

165−-- normalizeTimeWithZone :: (TimeOfDay, TimeZone) -> (TimeOfDay, TimeZone)

166−-- normalizeTimeWithZone (t, z) = (normalizeTimeOfDay t, z)

squeal-postgresql/test/Spec.hsdeleted−136

@@ -1,136 +0,0 @@

1−{-# LANGUAGE

2− DataKinds

3− , DeriveAnyClass

4− , DeriveGeneric

5− , DerivingStrategies

6− , DuplicateRecordFields

7− , FlexibleContexts

8− , OverloadedLabels

9− , OverloadedLists

10− , OverloadedStrings

11− , TypeApplications

12− , TypeFamilies

13− , TypeInType

14− , TypeOperators

15−#-}

16−

17−module Main (main) where

18−

19−import Control.Concurrent.Async (replicateConcurrently)

20−import Data.ByteString (ByteString)

21−import Data.Int (Int32)

22−import Data.Text (Text)

23−import Test.Hspec

24−

25−import qualified Generics.SOP as SOP

26−import qualified GHC.Generics as GHC

27−

28−import Squeal.PostgreSQL

29−

30−main :: IO ()

31−main = hspec spec

32−

33−type Schemas = Public

34− '[ "users" ::: 'Table (

35− '[ "pk_users" ::: 'PrimaryKey '["id"]

36− , "unique_names" ::: 'Unique '["name"]

37− ] :=>

38− '[ "id" ::: 'Def :=> 'NotNull 'PGint4

39− , "name" ::: 'NoDef :=> 'NotNull 'PGtext ] ) ]

40−

41−data User = User

42− { userName :: Text

43− } deriving stock (Eq, Show, GHC.Generic)

44− deriving anyclass (SOP.Generic, SOP.HasDatatypeInfo)

45−

46−insertUser :: Manipulation_ Schemas User ()

47−insertUser = insertInto_ #users

48− (Values_ (Default `as` #id :* Set (param @1) `as` #name))

49−

50−setup :: Definition (Public '[]) Schemas

51−setup =

52− createTable #users

53− ( serial `as` #id :*

54− notNullable text `as` #name )

55− ( primaryKey #id `as` #pk_users :*

56− unique #name `as` #unique_names )

57−

58−teardown :: Definition Schemas (Public '[])

59−teardown = dropTable #users

60−

61−silence :: MonadPQ schemas pq => pq ()

62−silence = manipulate_ $

63− UnsafeManipulation "SET client_min_messages TO WARNING;"

64−

65−setupDB :: IO ()

66−setupDB = withConnection connectionString $

67− silence & pqThen (define setup)

68−

69−dropDB :: IO ()

70−dropDB = withConnection connectionString $

71− silence & pqThen (define teardown)

72−

73−connectionString :: ByteString

74−connectionString = "host=localhost port=5432 dbname=exampledb"

75−

76−spec :: Spec

77−spec = before_ setupDB . after_ dropDB $ do

78−

79− describe "Exceptions" $ do

80−

81− let

82− testUser = User "TestUser"

83− newUser = manipulateParams_ insertUser

84− insertUserTwice = newUser testUser >> newUser testUser

85− err23505 = PQException $ PQState FatalError (Just "23505")

86− (Just "ERROR: duplicate key value violates unique constraint \"unique_names\"\nDETAIL: Key (name)=(TestUser) already exists.\n")

87−

88− it "should be thrown for constraint violation" $

89− withConnection connectionString insertUserTwice

90− `shouldThrow` (== err23505)

91−

92− it "should be rethrown for constraint violation in a transaction" $

93− withConnection connectionString (transactionally_ insertUserTwice)

94− `shouldThrow` (== err23505)

95−

96− describe "Pools" $

97−

98− it "should manage concurrent transactions" $ do

99− pool <- createConnectionPool

100− "host=localhost port=5432 dbname=exampledb" 1 0.5 10

101− let

102− query :: Query_ (Public '[]) () (Only Char)

103− query = values_ (literal 'a' `as` #fromOnly)

104− session = usingConnectionPool pool . transactionally_ $ do

105− result <- runQuery query

106− Just (Only chr) <- firstRow result

107− return chr

108− chrs <- replicateConcurrently 10 session

109− chrs `shouldSatisfy` all (== 'a')

110−

111− describe "Ranges" $

112−

113− it "should correctly decode ranges" $ do

114−

115− rangesOut <- withConnection connectionString $ do

116− let

117− query :: Query_ (Public '[]) () (Only (Range Int32))

118− query = values

119− ( range int4range (atLeast 3) `as` #fromOnly )

120− [ range int4range (3 <=..< 5) `as` #fromOnly

121− , range int4range Empty `as` #fromOnly

122− , range int4range whole `as` #fromOnly ]

123− getRows =<< runQuery query

124− (fromOnly <$> rangesOut :: [Range Int32]) `shouldBe`

125− [ atLeast 3, 3 <=..< 5, Empty, whole ]

126−

127− describe "Parameters" $ do

128−

129− it "should run queries that don't reference all their parameters" $ do

130−

131− out <- withConnection connectionString $ do

132− let

133− query :: Query_ (Public '[]) (Char,Int32) (Only Int32)

134− query = values_ (param @2 `as` #fromOnly)

135− firstRow =<< runQueryParams query ('a', 3 :: Int32)

136− (fromOnly <$> out :: Maybe Int32) `shouldBe` Just 3

squeal-postgresql/test/Specs/ExceptionHandling.hsnew file+140

@@ -0,0 +1,140 @@

1+{-# LANGUAGE DataKinds #-}

2+{-# LANGUAGE DeriveGeneric #-}

3+{-# LANGUAGE DuplicateRecordFields #-}

4+{-# LANGUAGE FlexibleContexts #-}

5+{-# LANGUAGE OverloadedLabels #-}

6+{-# LANGUAGE OverloadedLists #-}

7+{-# LANGUAGE OverloadedStrings #-}

8+{-# LANGUAGE TypeApplications #-}

9+{-# LANGUAGE TypeFamilies #-}

10+{-# LANGUAGE TypeInType #-}

11+{-# LANGUAGE TypeOperators #-}

12+module ExceptionHandling

13+ ( specs

14+ , User (..)

15+ ) where

16+

17+import Control.Concurrent.Async (replicateConcurrently)

18+import Control.Monad (void)

19+import Control.Monad.IO.Class (MonadIO (..))

20+import Data.Int (Int16)

21+import Data.Text (Text)

22+import Data.Vector (Vector)

23+import Test.Hspec

24+

25+import qualified Data.ByteString.Char8 as Char8

26+import qualified Generics.SOP as SOP

27+import qualified GHC.Generics as GHC

28+

29+import Squeal.PostgreSQL

30+

31+type Schema =

32+ '[ "users" ::: 'Table (

33+ '[ "pk_users" ::: 'PrimaryKey '["id"]

34+ , "unique_names" ::: 'Unique '["name"]

35+ ] :=>

36+ '[ "id" ::: 'Def :=> 'NotNull 'PGint4

37+ , "name" ::: 'NoDef :=> 'NotNull 'PGtext

38+ , "vec" ::: 'NoDef :=> 'NotNull ('PGvararray ('Null 'PGint2))

39+ ])

40+ , "emails" ::: 'Table (

41+ '[ "pk_emails" ::: 'PrimaryKey '["id"]

42+ , "fk_user_id" ::: 'ForeignKey '["user_id"] "users" '["id"]

43+ ] :=>

44+ '[ "id" ::: 'Def :=> 'NotNull 'PGint4

45+ , "user_id" ::: 'NoDef :=> 'NotNull 'PGint4

46+ , "email" ::: 'NoDef :=> 'Null 'PGtext

47+ ])

48+ ]

49+

50+type Schemas = Public Schema

51+

52+data User =

53+ User { userName :: Text

54+ , userEmail :: Maybe Text

55+ , userVec :: VarArray (Vector (Maybe Int16)) }

56+ deriving (Show, GHC.Generic)

57+instance SOP.Generic User

58+instance SOP.HasDatatypeInfo User

59+

60+insertUser :: Manipulation '[] Schemas '[ 'NotNull 'PGtext, 'NotNull ('PGvararray ('Null 'PGint2))]

61+ '[ "fromOnly" ::: 'NotNull 'PGint4 ]

62+insertUser = insertInto #users

63+ (Values_ (Default `as` #id :* Set (param @1) `as` #name :* Set (param @2) `as` #vec))

64+ OnConflictDoRaise (Returning (#id `as` #fromOnly))

65+

66+setup :: Definition (Public '[]) Schemas

67+setup =

68+ createTable #users

69+ ( serial `as` #id :*

70+ (text & notNullable) `as` #name :*

71+ (vararray int2 & notNullable) `as` #vec )

72+ ( primaryKey #id `as` #pk_users

73+ :* unique #name `as` #unique_names )

74+ >>>

75+ createTable #emails

76+ ( serial `as` #id :*

77+ (int & notNullable) `as` #user_id :*

78+ (text & nullable) `as` #email )

79+ ( primaryKey #id `as` #pk_emails :*

80+ foreignKey #user_id #users #id

81+ OnDeleteCascade OnUpdateCascade `as` #fk_user_id )

82+

83+teardown :: Definition Schemas (Public '[])

84+teardown = dropTable #emails >>> dropTable #users

85+

86+migration :: Migration Definition (Public '[]) Schemas

87+migration = Migration { name = "test"

88+ , up = setup

89+ , down = teardown }

90+

91+setupDB :: IO ()

92+setupDB = withConnection connectionString $

93+ manipulate (UnsafeManipulation "SET client_min_messages TO WARNING;")

94+ & pqThen (migrateUp (single migration))

95+

96+dropDB :: IO ()

97+dropDB = withConnection connectionString $

98+ manipulate (UnsafeManipulation "SET client_min_messages TO WARNING;")

99+ & pqThen (migrateDown (single migration))

100+

101+connectionString :: Char8.ByteString

102+connectionString = "host=localhost port=5432 dbname=exampledb"

103+

104+testUser :: User

105+testUser = User "TestUser" Nothing (VarArray [])

106+

107+newUser :: (MonadIO m, MonadPQ Schemas m) => User -> m ()

108+newUser u = void $ manipulateParams insertUser (userName u, userVec u)

109+

110+insertUserTwice :: (MonadIO m, MonadPQ Schemas m) => m ()

111+insertUserTwice = newUser testUser >> newUser testUser

112+

113+specs :: SpecWith ()

114+specs = before_ setupDB $ after_ dropDB $

115+ describe "Exceptions" $ do

116+

117+ let

118+ dupKeyErr = PQException $ PQState FatalError (Just "23505")

119+ (Just "ERROR: duplicate key value violates unique constraint \"unique_names\"\nDETAIL: Key (name)=(TestUser) already exists.\n")

120+

121+ it "should be thrown for unique constraint violation in a manipulation" $

122+ withConnection connectionString insertUserTwice

123+ `shouldThrow` (== dupKeyErr)

124+

125+ it "should be rethrown for unique constraint violation in a manipulation by a transaction" $

126+ withConnection connectionString (transactionally_ insertUserTwice)

127+ `shouldThrow` (== dupKeyErr)

128+

129+ it "should handle concurrent transactions using pooled connections" $ do

130+ pool <- createConnectionPool

131+ "host=localhost port=5432 dbname=exampledb" 1 0.5 10

132+ let

133+ query :: Query_ (Public '[]) () (Only Char)

134+ query = values_ (literal 'a' `as` #fromOnly)

135+ session = usingConnectionPool pool . transactionally_ $ do

136+ result <- runQuery query

137+ Just (Only chr) <- firstRow result

138+ return chr

139+ chrs <- replicateConcurrently 10 session

140+ chrs `shouldSatisfy` (all (== 'a'))

squeal-postgresql/test/Specs/Specs.hsnew file+7

@@ -0,0 +1,7 @@

1+module Main where

3+import Test.Hspec

4+import qualified ExceptionHandling

6+main :: IO ()

7+main = hspec ExceptionHandling.specs

stack.yaml+1−3

@@ -1,8 +1,6 @@

1−resolver: nightly-2019-07-14

1+resolver: lts-13.25

22packages:

33- squeal-postgresql

55extra-deps:

66- unliftio-pool-0.2.1.0

7−- github: morphismtech/free-categories

8− commit: c0e555fbefb5c21619e532264c4dfeac556d0630