901ff7b...dev · squeal

git.iko.soy/squeal

17 files changed+454−229

since splitsnapshots

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 `GHC.TypeLits.Symbol` with a `SchemumType`,

124+`:::` is used to pair an alias `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 `Generics.SOP.Generic` and

184−`Generics.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 `SOP.Generic` and

184+`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 `Generics.SOP.Generic` a

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

squeal-postgresql/exe/Example.hs+2−2

@@ -53,8 +53,8 @@ setup =

5353 >>>

5454 createTable #emails

5555 ( serial `as` #id :*

56− (int & notNullable) `as` #user_id :*

57− (text & nullable) `as` #email )

56+ hask @Int32 `as` #user_id :*

57+ hask @(Maybe Text) `as` #email )

5858 ( primaryKey #id `as` #pk_emails :*

5959 foreignKey #user_id #users #id

6060 OnDeleteCascade OnUpdateCascade `as` #fk_user_id )

squeal-postgresql/squeal-postgresql.cabal−1

@@ -28,7 +28,6 @@ library

2828 Squeal.PostgreSQL.Definition.Function

2929 Squeal.PostgreSQL.Definition.Index

3030 Squeal.PostgreSQL.Definition.Table

31− Squeal.PostgreSQL.Definition.Table.Column

3231 Squeal.PostgreSQL.Definition.Table.Constraint

3332 Squeal.PostgreSQL.Definition.Type

3433 Squeal.PostgreSQL.Definition.Schema

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

@@ -199,7 +199,6 @@ import Squeal.PostgreSQL.Definition.Function as X

199199import Squeal.PostgreSQL.Definition.Index as X

200200import Squeal.PostgreSQL.Definition.Schema as X

201201import Squeal.PostgreSQL.Definition.Table as X

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

203202import Squeal.PostgreSQL.Definition.Table.Constraint as X

204203import Squeal.PostgreSQL.Definition.Type as X

205204import Squeal.PostgreSQL.Definition.View as X

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

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

216216 -- * Only

217217 , Only (..)

218218 -- * Oid

219− , HasOid (..)

220− , HasAliasedOid (..)

219+ , OidOf (..)

220+ , OidOfParam (..)

221+ , OidOfField (..)

221222 ) where

222223

223224import BinaryParser

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

231232import Data.UUID.Types

232233import Data.Vector (Vector)

233234import Data.Word

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

234236import Generics.SOP

235237import Generics.SOP.Record

236238import GHC.TypeLits

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

244246import qualified Data.Text as Strict (Text)

245247import qualified Data.Text as Strict.Text

246248import qualified Data.Vector as Vector

249+import qualified Database.PostgreSQL.LibPQ as LibPQ

247250import qualified GHC.Generics as GHC

248251import qualified PostgreSQL.Binary.Decoding as Decoding

249252import qualified PostgreSQL.Binary.Encoding as Encoding

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

309312instance Aeson.ToJSON x => ToParam (Jsonb x) 'PGjsonb where

310313 toParam = K . Encoding.jsonb_bytes

311314 . Lazy.ByteString.toStrict . Aeson.encode . getJsonb

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

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

313316 => ToParam (VarArray [x]) ('PGvararray ty) where

314317 toParam = K

315318 . Encoding.array_foldable

316319 (getOid (oidOf @pg)) (unK . toNullityParam @x @ty)

317320 . getVarArray

318−instance (ToParam x pg, HasOid pg)

321+instance (ToParam x pg, OidOf pg)

319322 => ToParam (VarArray (Vector x)) ('PGvararray ('NotNull pg)) where

320323 toParam = K

321324 . Encoding.array_vector (getOid (oidOf @pg)) (unK . toParam @x @pg)

322325 . getVarArray

323−instance (ToParam x pg, HasOid pg)

326+instance (ToParam x pg, OidOf pg)

324327 => ToParam (VarArray (Vector (Maybe x))) ('PGvararray ('Null pg)) where

325328 toParam = K

326329 . Encoding.nullableArray_vector

327330 (getOid (oidOf @pg)) (unK . toParam @x @pg)

328331 . getVarArray

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

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

330333 => ToParam (FixArray x) ('PGfixarray dims ty) where

331334 toParam = K . Encoding.array (getOid (oidOf @pg))

332335 . unK . unK . toFixArray @x @dims @ty . getFixArray

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

353356 ( SListI fields

354357 , IsRecord x xs

355358 , AllZip ToField xs fields

356− , All HasAliasedOid fields

359+ , All OidOfField fields

357360 ) => ToParam (Composite x) ('PGcomposite fields) where

358361 toParam =

359362 let

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

361364 encoders = htrans (Proxy @ToField) toField

362365

363366 composite

364− :: All HasAliasedOid row

367+ :: All OidOfField row

365368 => NP (K (Maybe Encoding.Encoding)) row

366369 -> K Encoding.Encoding ('PGcomposite row)

367370 composite fields = K $

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

378381 int32BE (fromIntegral (lengthSList (Proxy @xs))) <>

379382 let

380383 each

381− :: HasAliasedOid field

384+ :: OidOfField field

382385 => K (Maybe Encoding.Encoding) field

383386 -> Encoding.Encoding

384387 each (K field :: K (Maybe Encoding.Encoding) field) =

385− word32BE (getOid (aliasedOid @field))

388+ word32BE (getOid (oidOfField @field))

386389 <> case field of

387390 Nothing -> int64BE (-1)

388391 Just value ->

389392 int32BE (fromIntegral (builderLength value))

390393 <> value

391394 in

392− hcfoldMap (Proxy @HasAliasedOid) each fields

395+ hcfoldMap (Proxy @OidOfField) each fields

393396

394397 in

395398 composite . encoders . toRecord . getComposite

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

398401--

399402-- >>> :set -XTypeApplications

400403-- >>> oidOf @'PGbool

401−-- Oid {getOid = 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

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

430517

431518-- | A `ToNullityParam` constraint gives an encoding of a Haskell `Type` into

432519-- into the binary format of a PostgreSQL `NullityType`.

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

756843 => m x -> m (NP I xs)

757844replicateMN mx = hsequence' $

758845 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+1

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

2727 , TypeInType

2828 , TypeOperators

2929 , UndecidableSuperClasses

30+ , UndecidableInstances

3031#-}

3132

3233module Squeal.PostgreSQL.Definition

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Table.hs+27−4

@@ -35,7 +35,9 @@ module Squeal.PostgreSQL.Definition.Table

3535 , dropTable

3636 , dropTableIfExists

3737 , alterTable

38+ , alterTableIfExists

3839 , alterTableRename

40+ , alterTableIfExistsRename

3941 , AlterTable (..)

4042 , addConstraint

4143 , dropConstraint

@@ -60,9 +62,9 @@ import qualified GHC.Generics as GHC

6062

6163import Squeal.PostgreSQL.Alias

6264import Squeal.PostgreSQL.Definition

63−import Squeal.PostgreSQL.Definition.Table.Column

6465import Squeal.PostgreSQL.Definition.Table.Constraint

6566import Squeal.PostgreSQL.Expression

67+import Squeal.PostgreSQL.Expression.Type

6668import Squeal.PostgreSQL.List

6769import Squeal.PostgreSQL.Render

6870import Squeal.PostgreSQL.Schema

@@ -202,16 +204,28 @@ dropTableIfExists tab = UnsafeDefinition $ "DROP TABLE IF EXISTS" <+> renderSQL

202204

203205-- | `alterTable` changes the definition of a table from the schema.

204206alterTable

205− :: (Has sch schemas schema, Has tab schema ('Table table0))

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

206208 => QualifiedAlias sch tab -- ^ table to alter

207− -> AlterTable sch tab schemas table1 -- ^ alteration to perform

208− -> Definition schemas (Alter sch (Alter tab ('Table table1) schema) schemas)

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

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

209211alterTable tab alteration = UnsafeDefinition $

210212 "ALTER TABLE"

211213 <+> renderSQL tab

212214 <+> renderAlterTable alteration

213215 <> ";"

214216

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+

215229-- | `alterTableRename` changes the name of a table from the schema.

216230--

217231-- >>> printSQL $ alterTableRename #foo #bar

@@ -225,6 +239,15 @@ alterTableRename tab0 tab1 = UnsafeDefinition $

225239 "ALTER TABLE" <+> renderSQL tab0

226240 <+> "RENAME TO" <+> renderSQL tab1 <> ";"

227241

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+

228251-- | An `AlterTable` describes the alteration to perform on the columns

229252-- of a table.

230253newtype AlterTable

squeal-postgresql/src/Squeal/PostgreSQL/Definition/Table/Column.hsdeleted−105

@@ -1,105 +0,0 @@

1−{-|

2−Module: Squeal.PostgreSQL.Definition.Table.Column

3−Description: Column type expressions

4−Copyright: (c) Eitan Chatav, 2017

5−Maintainer: eitan@morphism.tech

6−Stability: experimental

7−

8−Column type 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.Column

33− ( ColumnTypeExpression (..)

34− , nullable

35− , notNullable

36− , default_

37− , serial2

38− , smallserial

39− , serial4

40− , serial

41− , serial8

42− , bigserial

43− ) where

44−

45−import Control.DeepSeq

46−import Data.ByteString

47−

48−import qualified GHC.Generics as GHC

49−

50−import Squeal.PostgreSQL.Alias

51−import Squeal.PostgreSQL.Expression

52−import Squeal.PostgreSQL.Expression.Type

53−import Squeal.PostgreSQL.Render

54−import Squeal.PostgreSQL.Schema

55−

56−-- $setup

57−-- >>> import Squeal.PostgreSQL

58−

59−-- | `ColumnTypeExpression`s are used in `createTable` commands.

60−newtype ColumnTypeExpression (schemas :: SchemasType) (ty :: ColumnType)

61− = UnsafeColumnTypeExpression { renderColumnTypeExpression :: ByteString }

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

63−instance RenderSQL (ColumnTypeExpression schemas ty) where

64− renderSQL = renderColumnTypeExpression

65−

66−-- | used in `createTable` commands as a column constraint to note that

67−-- @NULL@ may be present in a column

68−nullable

69− :: TypeExpression schemas (nullity ty)

70− -> ColumnTypeExpression schemas ('NoDef :=> 'Null ty)

71−nullable ty = UnsafeColumnTypeExpression $ renderSQL ty <+> "NULL"

72−

73−-- | used in `createTable` commands as a column constraint to ensure

74−-- @NULL@ is not present in a column

75−notNullable

76− :: TypeExpression schemas (nullity ty)

77− -> ColumnTypeExpression schemas ('NoDef :=> 'NotNull ty)

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

79−

80−-- | used in `createTable` commands as a column constraint to give a default

81−default_

82− :: Expression '[] '[] 'Ungrouped schemas '[] '[] ty

83− -> ColumnTypeExpression schemas ('NoDef :=> ty)

84− -> ColumnTypeExpression schemas ('Def :=> ty)

85−default_ x ty = UnsafeColumnTypeExpression $

86− renderSQL ty <+> "DEFAULT" <+> renderExpression x

87−

88−-- | not a true type, but merely a notational convenience for creating

89−-- unique identifier columns with type `PGint2`

90−serial2, smallserial

91− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint2)

92−serial2 = UnsafeColumnTypeExpression "serial2"

93−smallserial = UnsafeColumnTypeExpression "smallserial"

94−-- | not a true type, but merely a notational convenience for creating

95−-- unique identifier columns with type `PGint4`

96−serial4, serial

97− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint4)

98−serial4 = UnsafeColumnTypeExpression "serial4"

99−serial = UnsafeColumnTypeExpression "serial"

100−-- | not a true type, but merely a notational convenience for creating

101−-- unique identifier columns with type `PGint8`

102−serial8, bigserial

103− :: ColumnTypeExpression schemas ('Def :=> 'NotNull 'PGint8)

104−serial8 = UnsafeColumnTypeExpression "serial8"

105−bigserial = UnsafeColumnTypeExpression "bigserial"

squeal-postgresql/src/Squeal/PostgreSQL/Expression/Type.hs+101−4

@@ -23,15 +23,16 @@ Type expressions.

2323 , ScopedTypeVariables

2424 , TypeApplications

2525 , TypeOperators

26+ , UndecidableInstances

2627#-}

2728

2829module Squeal.PostgreSQL.Expression.Type

29− ( TypeExpression (..)

30− , cast

30+ ( -- * type casting

31+ cast

3132 , astype

3233 , inferredtype

33− , PGTyped (..)

34− , FieldTyped (..)

34+ -- * type expressions

35+ , TypeExpression (..)

3536 , typedef

3637 , typetable

3738 , typeview

@@ -78,6 +79,22 @@ module Squeal.PostgreSQL.Expression.Type

7879 , tsrange

7980 , tstzrange

8081 , 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 (..)

8198 ) where

8299

83100import Control.DeepSeq

@@ -91,6 +108,7 @@ import qualified Generics.SOP as SOP

91108

92109import Squeal.PostgreSQL.Alias

93110import Squeal.PostgreSQL.Expression

111+import Squeal.PostgreSQL.PG

94112import Squeal.PostgreSQL.Render

95113import Squeal.PostgreSQL.Schema

96114

@@ -132,6 +150,7 @@ astype = cast

132150inferredtype

133151 :: PGTyped schemas ty

134152 => Expression outer common grp schemas params from ty

153+ -- ^ value

135154 -> Expression outer common grp schemas params from ty

136155inferredtype = astype pgtype

137156

@@ -151,6 +170,7 @@ instance RenderSQL (TypeExpression schemas ty) where

151170typedef

152171 :: (Has sch schemas schema, Has td schema ('Typedef ty))

153172 => QualifiedAlias sch td

173+ -- ^ type alias

154174 -> TypeExpression schemas (null ty)

155175typedef = UnsafeTypeExpression . renderSQL

156176

@@ -159,6 +179,7 @@ typedef = UnsafeTypeExpression . renderSQL

159179typetable

160180 :: (Has sch schemas schema, Has tab schema ('Table table))

161181 => QualifiedAlias sch tab

182+ -- ^ table alias

162183 -> TypeExpression schemas (null ('PGcomposite (TableToRow table)))

163184typetable = UnsafeTypeExpression . renderSQL

164185

@@ -167,6 +188,7 @@ typetable = UnsafeTypeExpression . renderSQL

167188typeview

168189 :: (Has sch schemas schema, Has vw schema ('View view))

169190 => QualifiedAlias sch vw

191+ -- ^ view alias

170192 -> TypeExpression schemas (null ('PGcomposite view))

171193typeview = UnsafeTypeExpression . renderSQL

172194

@@ -340,6 +362,12 @@ instance (SOP.All KnownNat dims, PGTyped schemas ty)

340362instance PGTyped schemas (null 'PGtsvector) where pgtype = tsvector

341363instance PGTyped schemas (null 'PGtsquery) where pgtype = tsquery

342364instance 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

343371

344372-- | Lift `PGTyped` to a field

345373class FieldTyped schemas ty where

@@ -347,3 +375,72 @@ class FieldTyped schemas ty where

347375instance (KnownSymbol alias, PGTyped schemas ty)

348376 => FieldTyped schemas (alias ::: ty) where

349377 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+11−2

@@ -84,7 +84,12 @@ infixl 9 *:

8484-- | @Elem@ is a promoted `Data.List.elem`.

8585type family Elem x xs where

8686 Elem x '[] = 'False

87− Elem x (x ': xs) = 'True

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

8893 Elem x (_ ': xs) = Elem x xs

8994

9095-- | @In x xs@ is a constraint that proves that @x@ is in @xs@.

@@ -99,5 +104,9 @@ Length '[Char,String,Bool,Double] :: Nat

99104= 4

100105-}

101106type family Length (xs :: [k]) :: Nat where

102− Length (x : xs) = 1 + Length xs

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

103112 Length '[] = 0

squeal-postgresql/src/Squeal/PostgreSQL/Migration.hs−1

@@ -168,7 +168,6 @@ import Squeal.PostgreSQL.Alias

168168import Squeal.PostgreSQL.Binary

169169import Squeal.PostgreSQL.Definition

170170import Squeal.PostgreSQL.Definition.Table

171−import Squeal.PostgreSQL.Definition.Table.Column

172171import Squeal.PostgreSQL.Definition.Table.Constraint

173172import Squeal.PostgreSQL.Expression.Comparison

174173import Squeal.PostgreSQL.Expression.Parameter

squeal-postgresql/src/Squeal/PostgreSQL/PG.hs+22−12

@@ -47,7 +47,7 @@ module Squeal.PostgreSQL.PG

4747 , Enumerated (..)

4848 , VarArray (..)

4949 , FixArray (..)

50− , Oid (..)

50+ , LibPQ.Oid (..)

5151 -- * Type families

5252 , LabelsPG

5353 , DimPG

@@ -66,7 +66,6 @@ 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)

7069import Data.UUID.Types (UUID)

7170import GHC.TypeLits

7271import Network.IP.Addr (NetAddr, IP)

@@ -75,6 +74,7 @@ import qualified Data.ByteString.Lazy as Lazy (ByteString)

7574import qualified Data.ByteString as Strict (ByteString)

7675import qualified Data.Text.Lazy as Lazy (Text)

7776import 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 Oid = 'PGoid

111+type instance PG LibPQ.Oid = 'PGoid

112112-- | `PGnumeric`

113113type instance PG Scientific = 'PGnumeric

114114-- | `PGfloat4`

@@ -178,8 +178,16 @@ 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 '[] = '[]

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

182189 RowOf (col ::: ty ': record) = col ::: NullPG ty ': RowOf record

190+ RowOf '[] = '[]

183191

184192{- | `NullPG` turns a Haskell type into a `NullityType`.

185193

@@ -206,8 +214,17 @@ type family TuplePG (hask :: Type) :: [NullityType] where

206214

207215-- | `TupleOf` turns a list of Haskell `Type`s into a list of `NullityType`s.

208216type family TupleOf (tuple :: [Type]) :: [NullityType] where

209− TupleOf '[] = '[]

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

210226 TupleOf (hask ': tuple) = NullPG hask ': TupleOf tuple

227+ TupleOf '[] = '[]

211228

212229-- | `TupleCodeOf` takes the `SOP.Code` of a haskell `Type`

213230-- and if it's a simple product returns it, otherwise giving a `TypeError`.

@@ -369,10 +386,3 @@ newtype FixArray arr = FixArray {getFixArray :: arr}

369386 deriving anyclass (SOP.HasDatatypeInfo, SOP.Generic)

370387-- | `PGfixarray` @(@`DimPG` @hask) (@`FixPG` @hask)@

371388type 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+41−17

@@ -78,6 +78,7 @@ import UnliftIO (MonadUnliftIO (..), bracket, catch, handle, try)

7878import Data.ByteString (ByteString)

7979import Data.Foldable

8080import Data.Function ((&))

81+import Data.Functor ((<&>))

8182import Data.Kind

8283import Data.Text (pack, Text)

8384import Data.Traversable

@@ -86,6 +87,7 @@ import PostgreSQL.Binary.Encoding (encodingBytes)

8687

8788import qualified Control.Monad.Fail as Fail

8889import qualified Database.PostgreSQL.LibPQ as LibPQ

90+import qualified PostgreSQL.Binary.Encoding as Encoding

8991

9092import Squeal.PostgreSQL.Binary

9193import Squeal.PostgreSQL.Definition

@@ -315,13 +317,13 @@ a default instance.

315317-}

316318class Monad pq => MonadPQ schemas pq | pq -> schemas where

317319 manipulateParams

318− :: ToParams x params

320+ :: (ToParams x params, All OidOfParam params)

319321 => Manipulation '[] schemas params ys

320322 -- ^ `insertInto`, `update` or `deleteFrom`

321323 -> x -> pq (K LibPQ.Result ys)

322324 default manipulateParams

323325 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

324− => ToParams x params

326+ => (ToParams x params, All OidOfParam params)

325327 => Manipulation '[] schemas params ys

326328 -- ^ `insertInto`, `update` or `deleteFrom`

327329 -> x -> pq (K LibPQ.Result ys)

@@ -329,7 +331,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

329331 manipulateParams manipulation params

330332

331333 manipulateParams_

332− :: ToParams x params

334+ :: (ToParams x params, All OidOfParam params)

333335 => Manipulation '[] schemas params '[]

334336 -- ^ `insertInto`, `update` or `deleteFrom`

335337 -> x -> pq ()

@@ -342,7 +344,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

342344 manipulate_ = void . manipulate

343345

344346 runQueryParams

345− :: ToParams x params

347+ :: (ToParams x params, All OidOfParam params)

346348 => Query '[] '[] schemas params ys

347349 -- ^ `select` and friends

348350 -> x -> pq (K LibPQ.Result ys)

@@ -355,19 +357,19 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

355357 runQuery q = runQueryParams q ()

356358

357359 traversePrepared

358− :: (ToParams x params, Traversable list)

360+ :: (ToParams x params, Traversable list, All OidOfParam params)

359361 => Manipulation '[] schemas params ys

360362 -- ^ `insertInto`, `update`, or `deleteFrom`, and friends

361363 -> list x -> pq (list (K LibPQ.Result ys))

362364 default traversePrepared

363365 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

364− => (ToParams x params, Traversable list)

366+ => (ToParams x params, Traversable list, All OidOfParam params)

365367 => Manipulation '[] schemas params ys -> list x -> pq (list (K LibPQ.Result ys))

366368 traversePrepared manipulation params = lift $

367369 traversePrepared manipulation params

368370

369371 forPrepared

370− :: (ToParams x params, Traversable list)

372+ :: (ToParams x params, Traversable list, All OidOfParam params)

371373 => list x

372374 -> Manipulation '[] schemas params ys

373375 -- ^ `insertInto`, `update` or `deleteFrom`

@@ -375,13 +377,13 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

375377 forPrepared = flip traversePrepared

376378

377379 traversePrepared_

378− :: (ToParams x params, Foldable list)

380+ :: (ToParams x params, Foldable list, All OidOfParam params)

379381 => Manipulation '[] schemas params '[]

380382 -- ^ `insertInto`, `update` or `deleteFrom`

381383 -> list x -> pq ()

382384 default traversePrepared_

383385 :: (MonadTrans t, MonadPQ schemas pq1, pq ~ t pq1)

384− => (ToParams x params, Foldable list)

386+ => (ToParams x params, Foldable list, All OidOfParam params)

385387 => Manipulation '[] schemas params '[]

386388 -- ^ `insertInto`, `update` or `deleteFrom`

387389 -> list x -> pq ()

@@ -389,7 +391,7 @@ class Monad pq => MonadPQ schemas pq | pq -> schemas where

389391 traversePrepared_ manipulation params

390392

391393 forPrepared_

392− :: (ToParams x params, Foldable list)

394+ :: (ToParams x params, Foldable list, All OidOfParam params)

393395 => list x

394396 -> Manipulation '[] schemas params '[]

395397 -- ^ `insertInto`, `update` or `deleteFrom`

@@ -409,9 +411,17 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

409411 (UnsafeManipulation q :: Manipulation '[] schemas ps ys) (params :: x) =

410412 PQ $ \ (K conn) -> do

411413 let

412− toParam' encoding =

413− (LibPQ.invalidOid, encodingBytes encoding, LibPQ.Binary)

414− params' = fmap (fmap toParam') (hcollapse (toParams @x @ps params))

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

415425 q' = q <> ";"

416426 resultMaybe <- liftIO $ LibPQ.execParams conn q' params' LibPQ.Binary

417427 case resultMaybe of

@@ -424,8 +434,15 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

424434 traversePrepared

425435 (UnsafeManipulation q :: Manipulation '[] schemas xs ys) (list :: list x) =

426436 PQ $ \ (K conn) -> liftIO $ do

427− let temp = "temporary_statement"

428− prepResultMaybe <- LibPQ.prepare conn temp q Nothing

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')

429446 case prepResultMaybe of

430447 Nothing -> throw $ ResultException

431448 "traversePrepared: LibPQ.prepare returned no results"

@@ -451,8 +468,15 @@ instance (MonadIO io, schemas0 ~ schemas, schemas1 ~ schemas)

451468 traversePrepared_

452469 (UnsafeManipulation q :: Manipulation '[] schemas xs '[]) (list :: list x) =

453470 PQ $ \ (K conn) -> liftIO $ do

454− let temp = "temporary_statement"

455− prepResultMaybe <- LibPQ.prepare conn temp q Nothing

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')

456480 case prepResultMaybe of

457481 Nothing -> throw $ ResultException

458482 "traversePrepared_: LibPQ.prepare returned no results"

squeal-postgresql/src/Squeal/PostgreSQL/Query.hs+33−25

@@ -554,9 +554,9 @@ select_ = select . List

554554-- be subject to the elimination of duplicate rows using `selectDistinct`.

555555selectDistinct

556556 :: (SListI columns, columns ~ (col ': cols))

557− => Selection outer commons 'Ungrouped schemas params from columns

557+ => Selection outer commons grp schemas params from columns

558558 -- ^ selection

559− -> TableExpression outer commons 'Ungrouped schemas params from

559+ -> TableExpression outer commons grp schemas params from

560560 -- ^ intermediate virtual table

561561 -> Query outer commons schemas params columns

562562selectDistinct selection tabexpr = UnsafeQuery $

@@ -568,9 +568,9 @@ selectDistinct selection tabexpr = UnsafeQuery $

568568-- of a general `Selection`.

569569selectDistinct_

570570 :: (SListI columns, columns ~ (col ': cols))

571− => NP (Aliased (Expression outer commons 'Ungrouped schemas params from)) columns

571+ => NP (Aliased (Expression outer commons grp schemas params from)) columns

572572 -- ^ select list

573− -> TableExpression outer commons 'Ungrouped schemas params from

573+ -> TableExpression outer commons grp schemas params from

574574 -- ^ intermediate virtual table

575575 -> Query outer commons schemas params columns

576576selectDistinct_ = selectDistinct . List

@@ -580,14 +580,21 @@ selectDistinct_ = selectDistinct . List

580580the given expressions evaluate to equal. The DISTINCT ON expressions are

581581interpreted using the same rules as for ORDER BY. ORDER BY is used to

582582ensure 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.

583590-}

584591selectDistinctOn

585592 :: (SListI columns, columns ~ (col ': cols))

586− => [SortExpression outer commons 'Ungrouped schemas params from]

587− -- ^ distinct on and return the first row in ordering

588− -> Selection outer commons 'Ungrouped schemas params from columns

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

589596 -- ^ selection

590− -> TableExpression outer commons 'Ungrouped schemas params from

597+ -> TableExpression outer commons grp schemas params from

591598 -- ^ intermediate virtual table

592599 -> Query outer commons schemas params columns

593600selectDistinctOn distincts selection tab = UnsafeQuery $

@@ -608,11 +615,11 @@ selectDistinctOn distincts selection tab = UnsafeQuery $

608615-- of a general `Selection`.

609616selectDistinctOn_

610617 :: (SListI columns, columns ~ (col ': cols))

611− => [SortExpression outer commons 'Ungrouped schemas params from]

618+ => [SortExpression outer commons grp schemas params from]

612619 -- ^ distinct on and return the first row in ordering

613− -> NP (Aliased (Expression outer commons 'Ungrouped schemas params from)) columns

620+ -> NP (Aliased (Expression outer commons grp schemas params from)) columns

614621 -- ^ selection

615− -> TableExpression outer commons 'Ungrouped schemas params from

622+ -> TableExpression outer commons grp schemas params from

616623 -- ^ intermediate virtual table

617624 -> Query outer commons schemas params columns

618625selectDistinctOn_ distincts = selectDistinctOn distincts . List

@@ -750,7 +757,7 @@ instance RenderSQL (TableExpression outer commons grp schemas params from) where

750757from

751758 :: FromClause outer commons schemas params from -- ^ table reference

752759 -> TableExpression outer commons 'Ungrouped schemas params from

753−from tab = TableExpression tab [] NoGroups NoHaving [] [] []

760+from tab = TableExpression tab [] noGroups NoHaving [] [] []

754761

755762-- | A `where_` is an endomorphism of `TableExpression`s which adds a

756763-- search condition to the `whereClause`.

@@ -771,7 +778,7 @@ groupBy

771778groupBy bys rels = TableExpression

772779 { fromClause = fromClause rels

773780 , whereClause = whereClause rels

774− , groupByClause = Group bys

781+ , groupByClause = group bys

775782 , havingClause = Having []

776783 , orderByClause = []

777784 , limitClause = limitClause rels

@@ -985,19 +992,20 @@ instance (Has rel rels cols, Has col cols ty, bys ~ '[ '(rel, col)])

985992-- done on @NoGroups@ while all output `Expression`s must be aggregated

986993-- in @Group Nil@. In general, all output `Expression`s in the

987994-- complement of @bys@ must be aggregated in @Group bys@.

988−data GroupByClause grp from where

989− NoGroups :: GroupByClause 'Ungrouped from

990− Group

991− :: SListI bys

992− => NP (By from) bys

993− -> GroupByClause ('Grouped bys) from

994−

995−-- | Renders a `GroupByClause`.

995+newtype GroupByClause grp from = UnsafeGroupByClause

996+ { renderGroupByClause :: ByteString }

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

996998instance RenderSQL (GroupByClause grp from) where

997− renderSQL = \case

998− NoGroups -> ""

999− Group Nil -> ""

1000− Group bys -> " GROUP BY" <+> renderCommaSeparated renderSQL bys

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'

10011009

10021010-- | A `HavingClause` is used to eliminate groups that are not of interest.

10031011-- An `Ungrouped` `TableExpression` may only use `NoHaving` while a `Grouped`

squeal-postgresql/src/Squeal/PostgreSQL/Schema.hs+67−7

@@ -69,7 +69,9 @@ module Squeal.PostgreSQL.Schema

6969 , DropIfExists

7070 , DropSchemumIfExists

7171 , Alter

72+ , AlterIfExists

7273 , Rename

74+ , RenameIfExists

7375 , ConstraintInvolves

7476 , DropIfConstraintsInvolve

7577 , IsNotElem

@@ -258,9 +260,19 @@ type FromType = [(Symbol,RowType)]

258260

259261-- | `ColumnsToRow` removes column constraints.

260262type family ColumnsToRow (columns :: ColumnsType) :: RowType where

261− ColumnsToRow '[] = '[]

262− ColumnsToRow (column ::: constraint :=> ty ': columns) =

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) =

263274 column ::: ty ': ColumnsToRow columns

275+ ColumnsToRow '[] = '[]

264276

265277-- | `TableToColumns` removes table constraints.

266278type family TableToColumns (table :: TableType) :: ColumnsType where

@@ -293,14 +305,24 @@ instance ty0 ~ ty1 => SamePGType

293305

294306-- | `AllNotNull` is a constraint that proves a `ColumnsType` has no @NULL@s.

295307type 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

296314 AllNotNull '[] = ()

297− AllNotNull (column ::: def :=> 'NotNull ty ': columns) = AllNotNull columns

298315

299316-- | `NotAllNull` is a constraint that proves a `ColumnsType` has some

300317-- @NOT NULL@.

301318type family NotAllNull (columns :: ColumnsType) :: Constraint where

302− NotAllNull (column ::: def :=> 'NotNull ty ': columns) = ()

303− NotAllNull (column ::: def :=> 'Null ty ': columns) = NotAllNull columns

319+ NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

320+ NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

321+ NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

322+ NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

323+ NotAllNull (_ ::: _ :=> _ _ ': _ ::: _ :=> 'NotNull _ ': _) = ()

324+ NotAllNull (_ ::: _ :=> 'NotNull _ ': _) = ()

325+ NotAllNull (_ ::: _ :=> 'Null _ ': columns) = NotAllNull columns

304326

305327-- | `NullifyType` is an idempotent that nullifies a `NullityType`.

306328type family NullifyType (ty :: NullityType) :: NullityType where

@@ -309,17 +331,37 @@ type family NullifyType (ty :: NullityType) :: NullityType where

309331

310332-- | `NullifyRow` is an idempotent that nullifies a `RowType`.

311333type family NullifyRow (columns :: RowType) :: RowType where

312− NullifyRow '[] = '[]

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

313344 NullifyRow (column ::: ty ': columns) =

314345 column ::: NullifyType ty ': NullifyRow columns

346+ NullifyRow '[] = '[]

315347

316348-- | `NullifyFrom` is an idempotent that nullifies a `FromType`

317349-- used to nullify the left or right hand side of an outer join

318350-- in a `Squeal.PostgreSQL.Query.FromClause`.

319351type family NullifyFrom (tables :: FromType) :: FromType where

320− NullifyFrom '[] = '[]

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

321362 NullifyFrom (table ::: columns ': tables) =

322363 table ::: NullifyRow columns ': NullifyFrom tables

364+ NullifyFrom '[] = '[]

323365

324366-- | @Create alias x xs@ adds @alias ::: x@ to the end of @xs@ and is used in

325367-- `Squeal.PostgreSQL.Definition.createTable` statements and in @ALTER TABLE@

@@ -396,16 +438,34 @@ type family DropSchemumIfExists alias sch xs where

396438-- with the type @x@ and is used in `Squeal.PostgreSQL.Definition.alterTable`

397439-- and `Squeal.PostgreSQL.Definition.alterColumn`.

398440type family Alter alias x xs where

441+ Alter alias x '[] = TypeError

442+ ('Text "Alter: alias "

443+ ':<>: 'ShowType alias

444+ ':<>: 'Text " does not exist" )

399445 Alter alias x1 (alias ::: x0 ': xs) = alias ::: x1 ': xs

400446 Alter alias x1 (x0 ': xs) = x0 ': Alter alias x1 xs

401447

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+

402453-- | @Rename alias0 alias1 xs@ replaces the alias @alias0@ by @alias1@ in @xs@

403454-- and is used in `Squeal.PostgreSQL.Definition.alterTableRename` and

404455-- `Squeal.PostgreSQL.Definition.renameColumn`.

405456type family Rename alias0 alias1 xs where

457+ Rename alias0 alias1 '[] = TypeError

458+ ('Text "Rename: alias "

459+ ':<>: 'ShowType alias0

460+ ':<>: 'Text " does not exist" )

406461 Rename alias0 alias1 ((alias0 ::: x0) ': xs) = (alias1 ::: x0) ': xs

407462 Rename alias0 alias1 (x ': xs) = x ': Rename alias0 alias1 xs

408463

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+

409469-- | Check if a `TableConstraint` involves a column

410470type family ConstraintInvolves column constraint where

411471 ConstraintInvolves column ('Check columns) = column `Elem` columns

squeal-postgresql/test/Property.hs+2−2

@@ -92,14 +92,14 @@ roundtrips = Group "roundtrips"

9292 -- genTimeWithZone = (,) <$> genTimeOfDay <*> genTimeZone

9393

9494roundtrip

95− :: (ToParam x ty, FromValue ty x, Show x, Eq x)

95+ :: (OidOf ty, ToParam x ty, FromValue ty x, Show x, Eq x)

9696 => TypeExpression schemas ('NotNull ty)

9797 -> Gen x

9898 -> (PropertyName, Property)

9999roundtrip = roundtripOn id

100100

101101roundtripOn

102− :: (ToParam x ty, FromValue ty x, Show x, Eq x)

102+ :: (OidOf ty, ToParam x ty, FromValue ty x, Show x, Eq x)

103103 => (x -> x)

104104 -> TypeExpression schemas ('NotNull ty)

105105 -> Gen x

squeal-postgresql/test/Spec.hs+11

@@ -123,3 +123,14 @@ spec = before_ setupDB . after_ dropDB $ do

123123 getRows =<< runQuery query

124124 (fromOnly <$> rangesOut :: [Range Int32]) `shouldBe`

125125 [ 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