mirror of
https://github.com/hasura/graphql-engine.git
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b167120f96
We'll see if this improves compile times at all, but I think it's worth doing as at least the most minimal form of module documentation. This was accomplished by first compiling everything with -ddump-minimal-imports, and then a bunch of scripting (with help from ormolu) **EDIT** it doesn't seem to improve CI compile times but the noise floor is high as it looks like we're not caching library dependencies anymore PR-URL: https://github.com/hasura/graphql-engine-mono/pull/2730 GitOrigin-RevId: 667eb8de1e0f1af70420cbec90402922b8b84cb4
1120 lines
27 KiB
Haskell
1120 lines
27 KiB
Haskell
module Hasura.Backends.Postgres.SQL.DML
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( Alias (..),
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BinOp (AndOp, OrOp),
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BoolExp (..),
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CTE (CTEDelete, CTEInsert, CTESelect, CTEUpdate),
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CompareOp (SContainedIn, SContains, SEQ, SGT, SGTE, SHasKey, SHasKeysAll, SHasKeysAny, SILIKE, SIREGEX, SLIKE, SLT, SLTE, SMatchesFulltext, SNE, SNILIKE, SNIREGEX, SNLIKE, SNREGEX, SNSIMILAR, SREGEX, SSIMILAR),
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CountType (CTDistinct, CTSimple, CTStar),
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DistinctExpr (DistinctOn, DistinctSimple),
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Extractor (..),
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FromExp (..),
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FromItem (..),
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FunctionAlias (FunctionAlias),
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FunctionArgs (FunctionArgs),
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FunctionExp (FunctionExp),
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GroupByExp (GroupByExp),
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HavingExp (HavingExp),
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JoinCond (..),
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JoinExpr (JoinExpr),
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JoinType (Inner, LeftOuter),
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Lateral (Lateral),
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LimitExp (LimitExp),
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NullsOrder (NFirst, NLast),
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OffsetExp (OffsetExp),
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OrderByExp (..),
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OrderByItem (OrderByItem, oColumn),
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OrderType (OTAsc, OTDesc),
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QIdentifier (QIdentifier),
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Qual (QualTable, QualVar, QualifiedIdentifier),
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RetExp (RetExp),
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SQLConflict (..),
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SQLConflictTarget (SQLColumn, SQLConstraint),
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SQLDelete (SQLDelete),
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SQLExp (..),
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SQLInsert (SQLInsert, siCols, siConflict, siRet, siTable, siValues),
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SQLOp (SQLOp),
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SQLUpdate (SQLUpdate),
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Select (Select, selCTEs, selDistinct, selExtr, selFrom, selLimit, selOffset, selOrderBy, selWhere),
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SelectWith,
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SelectWithG (SelectWith),
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SetExp (SetExp),
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SetExpItem (..),
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TupleExp (TupleExp),
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TypeAnn (TypeAnn),
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ValuesExp (ValuesExp),
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WhereFrag (WhereFrag),
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applyJsonBuildArray,
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applyJsonBuildObj,
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applyRowToJson,
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boolTypeAnn,
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buildUpsertSetExp,
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columnDefaultValue,
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countStar,
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handleIfNull,
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incOp,
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int64ToSQLExp,
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intToSQLExp,
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intTypeAnn,
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jsonTypeAnn,
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jsonbConcatOp,
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jsonbDeleteAtPathOp,
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jsonbDeleteOp,
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jsonbPathOp,
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jsonbTypeAnn,
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mkExists,
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mkExtr,
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mkFunctionAlias,
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mkIdenFromExp,
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mkLateralFromItem,
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mkQIdenExp,
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mkQIdentifierTable,
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mkQual,
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mkRowExp,
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mkSIdenExp,
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mkSQLOpExp,
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mkSelFromExp,
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mkSelFromItem,
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mkSelect,
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mkSelectWithFromItem,
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mkSimpleFromExp,
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mkTypeAnn,
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mulOp,
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numericTypeAnn,
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returningStar,
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selectStar,
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selectStar',
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simplifyBoolExp,
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textArrTypeAnn,
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textTypeAnn,
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toAlias,
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withTyAnn,
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)
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where
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import Data.Aeson qualified as J
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import Data.Aeson.Casing qualified as J
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import Data.HashMap.Strict qualified as HM
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import Data.Int (Int64)
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import Data.String (fromString)
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import Data.Text.Extended
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import Hasura.Backends.Postgres.SQL.Types
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import Hasura.Incremental (Cacheable)
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import Hasura.Prelude
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import Hasura.SQL.Types
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import Text.Builder qualified as TB
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data Select = Select
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{ -- | Unlike 'SelectWith', does not allow data-modifying statements (as those are only allowed at
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-- the top level of a query).
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selCTEs :: ![(Alias, Select)],
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selDistinct :: !(Maybe DistinctExpr),
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selExtr :: ![Extractor],
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selFrom :: !(Maybe FromExp),
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selWhere :: !(Maybe WhereFrag),
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selGroupBy :: !(Maybe GroupByExp),
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selHaving :: !(Maybe HavingExp),
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selOrderBy :: !(Maybe OrderByExp),
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selLimit :: !(Maybe LimitExp),
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selOffset :: !(Maybe OffsetExp)
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}
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deriving (Show, Eq, Generic, Data)
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instance NFData Select
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instance Cacheable Select
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instance Hashable Select
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mkSelect :: Select
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mkSelect =
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Select
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[]
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Nothing
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[]
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Nothing
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Nothing
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Nothing
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Nothing
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Nothing
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Nothing
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Nothing
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newtype LimitExp
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= LimitExp SQLExp
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL LimitExp where
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toSQL (LimitExp se) =
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"LIMIT" <~> toSQL se
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newtype OffsetExp
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= OffsetExp SQLExp
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL OffsetExp where
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toSQL (OffsetExp se) =
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"OFFSET" <~> toSQL se
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newtype OrderByExp
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= OrderByExp (NonEmpty OrderByItem)
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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data OrderByItem = OrderByItem
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{ oColumn :: !SQLExp,
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oType :: !(Maybe OrderType),
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oNulls :: !(Maybe NullsOrder)
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}
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deriving (Show, Eq, Generic, Data)
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instance NFData OrderByItem
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instance Cacheable OrderByItem
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instance Hashable OrderByItem
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instance ToSQL OrderByItem where
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toSQL (OrderByItem e ot no) =
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toSQL e <~> toSQL ot <~> toSQL no
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data OrderType = OTAsc | OTDesc
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deriving (Show, Eq, Generic, Data)
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instance NFData OrderType
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instance Cacheable OrderType
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instance Hashable OrderType
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instance ToSQL OrderType where
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toSQL OTAsc = "ASC"
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toSQL OTDesc = "DESC"
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instance J.FromJSON OrderType where
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parseJSON = J.genericParseJSON $ J.defaultOptions {J.constructorTagModifier = J.snakeCase . drop 2}
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instance J.ToJSON OrderType where
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toJSON = J.genericToJSON $ J.defaultOptions {J.constructorTagModifier = J.snakeCase . drop 2}
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data NullsOrder
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= NFirst
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| NLast
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deriving (Show, Eq, Generic, Data)
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instance NFData NullsOrder
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instance Cacheable NullsOrder
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instance Hashable NullsOrder
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instance ToSQL NullsOrder where
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toSQL NFirst = "NULLS FIRST"
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toSQL NLast = "NULLS LAST"
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instance J.FromJSON NullsOrder where
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parseJSON = J.genericParseJSON $ J.defaultOptions {J.constructorTagModifier = J.snakeCase . drop 1}
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instance J.ToJSON NullsOrder where
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toJSON = J.genericToJSON $ J.defaultOptions {J.constructorTagModifier = J.snakeCase . drop 1}
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instance ToSQL OrderByExp where
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toSQL (OrderByExp l) =
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"ORDER BY" <~> (", " <+> toList l)
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newtype GroupByExp
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= GroupByExp [SQLExp]
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL GroupByExp where
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toSQL (GroupByExp idens) =
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"GROUP BY" <~> (", " <+> idens)
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newtype FromExp
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= FromExp [FromItem]
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL FromExp where
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toSQL (FromExp items) =
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"FROM" <~> (", " <+> items)
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mkIdenFromExp :: (IsIdentifier a) => a -> FromExp
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mkIdenFromExp a =
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FromExp [FIIdentifier $ toIdentifier a]
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mkSimpleFromExp :: QualifiedTable -> FromExp
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mkSimpleFromExp qt =
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FromExp [FISimple qt Nothing]
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mkSelFromExp :: Bool -> Select -> TableName -> FromItem
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mkSelFromExp isLateral sel tn =
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FISelect (Lateral isLateral) sel alias
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where
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alias = Alias $ toIdentifier tn
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mkRowExp :: [Extractor] -> SQLExp
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mkRowExp extrs =
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let innerSel = mkSelect {selExtr = extrs}
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innerSelName = TableName "e"
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-- SELECT r FROM (SELECT col1, col2, .. ) AS r
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outerSel =
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mkSelect
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{ selExtr = [Extractor (SERowIdentifier $ toIdentifier innerSelName) Nothing],
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selFrom =
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Just $
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FromExp
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[mkSelFromExp False innerSel innerSelName]
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}
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in SESelect outerSel
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newtype HavingExp
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= HavingExp BoolExp
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL HavingExp where
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toSQL (HavingExp be) =
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"HAVING" <~> toSQL be
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newtype WhereFrag = WhereFrag {getWFBoolExp :: BoolExp}
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL WhereFrag where
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toSQL (WhereFrag be) =
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"WHERE" <~> parenB (toSQL be)
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instance ToSQL Select where
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toSQL sel = case selCTEs sel of
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[] ->
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"SELECT"
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<~> toSQL (selDistinct sel)
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<~> (", " <+> selExtr sel)
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<~> toSQL (selFrom sel)
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<~> toSQL (selWhere sel)
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<~> toSQL (selGroupBy sel)
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<~> toSQL (selHaving sel)
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<~> toSQL (selOrderBy sel)
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<~> toSQL (selLimit sel)
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<~> toSQL (selOffset sel)
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-- reuse SelectWith if there are any CTEs, since the generated SQL is the same
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ctes -> toSQL $ SelectWith (map (CTESelect <$>) ctes) sel {selCTEs = []}
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mkSIdenExp :: (IsIdentifier a) => a -> SQLExp
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mkSIdenExp = SEIdentifier . toIdentifier
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mkQIdenExp :: (IsIdentifier a, IsIdentifier b) => a -> b -> SQLExp
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mkQIdenExp q t = SEQIdentifier $ mkQIdentifier q t
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data Qual
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= QualifiedIdentifier !Identifier !(Maybe TypeAnn)
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| QualTable !QualifiedTable
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| QualVar !Text
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deriving (Show, Eq, Generic, Data)
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instance NFData Qual
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instance Cacheable Qual
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instance Hashable Qual
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mkQual :: QualifiedTable -> Qual
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mkQual = QualTable
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instance ToSQL Qual where
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toSQL (QualifiedIdentifier i Nothing) = toSQL i
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toSQL (QualifiedIdentifier i (Just ty)) = parenB (toSQL i <> toSQL ty)
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toSQL (QualTable qt) = toSQL qt
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toSQL (QualVar v) = TB.text v
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mkQIdentifier :: (IsIdentifier a, IsIdentifier b) => a -> b -> QIdentifier
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mkQIdentifier q t = QIdentifier (QualifiedIdentifier (toIdentifier q) Nothing) (toIdentifier t)
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mkQIdentifierTable :: (IsIdentifier a) => QualifiedTable -> a -> QIdentifier
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mkQIdentifierTable q = QIdentifier (mkQual q) . toIdentifier
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data QIdentifier
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= QIdentifier !Qual !Identifier
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deriving (Show, Eq, Generic, Data)
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instance NFData QIdentifier
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instance Cacheable QIdentifier
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instance Hashable QIdentifier
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instance ToSQL QIdentifier where
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toSQL (QIdentifier qual iden) =
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mconcat [toSQL qual, TB.char '.', toSQL iden]
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newtype SQLOp = SQLOp {sqlOpTxt :: Text}
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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incOp :: SQLOp
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incOp = SQLOp "+"
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mulOp :: SQLOp
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mulOp = SQLOp "*"
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jsonbPathOp :: SQLOp
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jsonbPathOp = SQLOp "#>"
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jsonbConcatOp :: SQLOp
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jsonbConcatOp = SQLOp "||"
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jsonbDeleteOp :: SQLOp
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jsonbDeleteOp = SQLOp "-"
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jsonbDeleteAtPathOp :: SQLOp
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jsonbDeleteAtPathOp = SQLOp "#-"
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newtype TypeAnn = TypeAnn {unTypeAnn :: Text}
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL TypeAnn where
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toSQL (TypeAnn ty) = "::" <> TB.text ty
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mkTypeAnn :: CollectableType PGScalarType -> TypeAnn
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mkTypeAnn = TypeAnn . toSQLTxt
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intTypeAnn :: TypeAnn
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intTypeAnn = mkTypeAnn $ CollectableTypeScalar PGInteger
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numericTypeAnn :: TypeAnn
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numericTypeAnn = mkTypeAnn $ CollectableTypeScalar PGNumeric
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textTypeAnn :: TypeAnn
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textTypeAnn = mkTypeAnn $ CollectableTypeScalar PGText
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textArrTypeAnn :: TypeAnn
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textArrTypeAnn = mkTypeAnn $ CollectableTypeArray PGText
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jsonTypeAnn :: TypeAnn
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jsonTypeAnn = mkTypeAnn $ CollectableTypeScalar PGJSON
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jsonbTypeAnn :: TypeAnn
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jsonbTypeAnn = mkTypeAnn $ CollectableTypeScalar PGJSONB
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boolTypeAnn :: TypeAnn
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boolTypeAnn = mkTypeAnn $ CollectableTypeScalar PGBoolean
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data CountType
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= CTStar
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| CTSimple ![PGCol]
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| CTDistinct ![PGCol]
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deriving (Show, Eq, Generic, Data)
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instance NFData CountType
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instance Cacheable CountType
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instance Hashable CountType
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instance ToSQL CountType where
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toSQL CTStar = "*"
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toSQL (CTSimple cols) =
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parenB $ ", " <+> cols
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toSQL (CTDistinct cols) =
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"DISTINCT" <~> parenB (", " <+> cols)
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newtype TupleExp
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= TupleExp [SQLExp]
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance ToSQL TupleExp where
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toSQL (TupleExp exps) =
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parenB $ ", " <+> exps
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data SQLExp
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= SEPrep !Int
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| SENull
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| SELit !Text
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| SEUnsafe !Text
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| SESelect !Select
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| -- | all fields (@*@) or all fields from relation (@iden.*@)
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SEStar !(Maybe Qual)
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| SEIdentifier !Identifier
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| -- iden and row identifier are distinguished for easier rewrite rules
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SERowIdentifier !Identifier
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| SEQIdentifier !QIdentifier
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| -- | this is used to apply a sql function to an expression. The 'Text' is the function name
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SEFnApp !Text ![SQLExp] !(Maybe OrderByExp)
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| SEOpApp !SQLOp ![SQLExp]
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| SETyAnn !SQLExp !TypeAnn
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| SECond !BoolExp !SQLExp !SQLExp
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| SEBool !BoolExp
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| SEExcluded !Identifier
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| SEArray ![SQLExp]
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| SEArrayIndex !SQLExp !SQLExp
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| SETuple !TupleExp
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| SECount !CountType
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| SENamedArg !Identifier !SQLExp
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| SEFunction !FunctionExp
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deriving (Show, Eq, Generic, Data)
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instance NFData SQLExp
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instance Cacheable SQLExp
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instance Hashable SQLExp
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withTyAnn :: PGScalarType -> SQLExp -> SQLExp
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withTyAnn colTy v = SETyAnn v . mkTypeAnn $ CollectableTypeScalar colTy
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instance J.ToJSON SQLExp where
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toJSON = J.toJSON . toSQLTxt
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-- Use the 'Extractor' data-type to Postgres alias tables/columns
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newtype Alias = Alias {getAlias :: Identifier}
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deriving (Show, Eq, NFData, Data, Cacheable, Hashable)
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instance IsIdentifier Alias where
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toIdentifier (Alias iden) = iden
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instance ToSQL Alias where
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toSQL (Alias iden) = "AS" <~> toSQL iden
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toAlias :: (IsIdentifier a) => a -> Alias
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toAlias = Alias . toIdentifier
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countStar :: SQLExp
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countStar = SECount CTStar
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instance ToSQL SQLExp where
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toSQL (SEPrep argNumber) =
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TB.char '$' <> fromString (show argNumber)
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toSQL SENull =
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TB.text "NULL"
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toSQL (SELit tv) =
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TB.text $ pgFmtLit tv
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toSQL (SEUnsafe t) =
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TB.text t
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toSQL (SESelect se) =
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parenB $ toSQL se
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toSQL (SEStar Nothing) =
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TB.char '*'
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toSQL (SEStar (Just qual)) =
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mconcat [toSQL qual, TB.char '.', TB.char '*']
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toSQL (SEIdentifier iden) =
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toSQL iden
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toSQL (SERowIdentifier iden) =
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toSQL iden
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toSQL (SEQIdentifier qIdentifier) =
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toSQL qIdentifier
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-- https://www.postgresql.org/docs/10/static/sql-expressions.html#SYNTAX-AGGREGATES
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toSQL (SEFnApp name args mObe) =
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TB.text name <> parenB ((", " <+> args) <~> toSQL mObe)
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toSQL (SEOpApp op args) =
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parenB (sqlOpTxt op <+> args)
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toSQL (SETyAnn e ty) =
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parenB (toSQL e) <> toSQL ty
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toSQL (SECond cond te fe) =
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"CASE WHEN" <~> toSQL cond
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<~> "THEN"
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<~> toSQL te
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<~> "ELSE"
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<~> toSQL fe
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<~> "END"
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toSQL (SEBool be) = toSQL be
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toSQL (SEExcluded i) =
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"EXCLUDED."
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<> toSQL i
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toSQL (SEArray exps) =
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"ARRAY" <> TB.char '['
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<> (", " <+> exps)
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<> TB.char ']'
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toSQL (SEArrayIndex arrayExp indexExp) =
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parenB (toSQL arrayExp)
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<> TB.char '['
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<> toSQL indexExp
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<> TB.char ']'
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toSQL (SETuple tup) = toSQL tup
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toSQL (SECount ty) = "COUNT" <> parenB (toSQL ty)
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-- https://www.postgresql.org/docs/current/sql-syntax-calling-funcs.html
|
|
toSQL (SENamedArg arg val) = toSQL arg <~> "=>" <~> toSQL val
|
|
toSQL (SEFunction funcExp) = toSQL funcExp
|
|
|
|
intToSQLExp :: Int -> SQLExp
|
|
intToSQLExp = SEUnsafe . tshow
|
|
|
|
int64ToSQLExp :: Int64 -> SQLExp
|
|
int64ToSQLExp = SEUnsafe . tshow
|
|
|
|
-- | Extractor can be used to apply Postgres alias to a column
|
|
data Extractor = Extractor !SQLExp !(Maybe Alias)
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData Extractor
|
|
|
|
instance Cacheable Extractor
|
|
|
|
instance Hashable Extractor
|
|
|
|
mkSQLOpExp ::
|
|
SQLOp ->
|
|
SQLExp -> -- lhs
|
|
SQLExp -> -- rhs
|
|
SQLExp -- result
|
|
mkSQLOpExp op lhs rhs = SEOpApp op [lhs, rhs]
|
|
|
|
columnDefaultValue :: SQLExp
|
|
columnDefaultValue = SEUnsafe "DEFAULT"
|
|
|
|
handleIfNull :: SQLExp -> SQLExp -> SQLExp
|
|
handleIfNull l e = SEFnApp "coalesce" [e, l] Nothing
|
|
|
|
applyJsonBuildObj :: [SQLExp] -> SQLExp
|
|
applyJsonBuildObj args =
|
|
SEFnApp "json_build_object" args Nothing
|
|
|
|
applyJsonBuildArray :: [SQLExp] -> SQLExp
|
|
applyJsonBuildArray args =
|
|
SEFnApp "json_build_array" args Nothing
|
|
|
|
applyRowToJson :: [Extractor] -> SQLExp
|
|
applyRowToJson extrs =
|
|
SEFnApp "row_to_json" [mkRowExp extrs] Nothing
|
|
|
|
mkExtr :: (IsIdentifier a) => a -> Extractor
|
|
mkExtr t = Extractor (mkSIdenExp t) Nothing
|
|
|
|
instance ToSQL Extractor where
|
|
toSQL (Extractor ce mal) =
|
|
toSQL ce <~> toSQL mal
|
|
|
|
data DistinctExpr
|
|
= DistinctSimple
|
|
| DistinctOn ![SQLExp]
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData DistinctExpr
|
|
|
|
instance Cacheable DistinctExpr
|
|
|
|
instance Hashable DistinctExpr
|
|
|
|
instance ToSQL DistinctExpr where
|
|
toSQL DistinctSimple = "DISTINCT"
|
|
toSQL (DistinctOn exps) =
|
|
"DISTINCT ON" <~> parenB ("," <+> exps)
|
|
|
|
data FunctionArgs = FunctionArgs
|
|
{ fasPostional :: ![SQLExp],
|
|
fasNamed :: !(HM.HashMap Text SQLExp)
|
|
}
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData FunctionArgs
|
|
|
|
instance Cacheable FunctionArgs
|
|
|
|
instance Hashable FunctionArgs
|
|
|
|
instance ToSQL FunctionArgs where
|
|
toSQL (FunctionArgs positionalArgs namedArgsMap) =
|
|
let namedArgs = flip map (HM.toList namedArgsMap) $
|
|
\(argName, argVal) -> SENamedArg (Identifier argName) argVal
|
|
in parenB $ ", " <+> (positionalArgs <> namedArgs)
|
|
|
|
data DefinitionListItem = DefinitionListItem
|
|
{ _dliColumn :: !PGCol,
|
|
_dliType :: !PGScalarType
|
|
}
|
|
deriving (Show, Eq, Data, Generic)
|
|
|
|
instance NFData DefinitionListItem
|
|
|
|
instance Cacheable DefinitionListItem
|
|
|
|
instance Hashable DefinitionListItem
|
|
|
|
instance ToSQL DefinitionListItem where
|
|
toSQL (DefinitionListItem column columnType) =
|
|
toSQL column <~> toSQL columnType
|
|
|
|
data FunctionAlias = FunctionAlias
|
|
{ _faIdentifier :: !Alias,
|
|
_faDefinitionList :: !(Maybe [DefinitionListItem])
|
|
}
|
|
deriving (Show, Eq, Data, Generic)
|
|
|
|
instance NFData FunctionAlias
|
|
|
|
instance Cacheable FunctionAlias
|
|
|
|
instance Hashable FunctionAlias
|
|
|
|
mkFunctionAlias :: Identifier -> Maybe [(PGCol, PGScalarType)] -> FunctionAlias
|
|
mkFunctionAlias identifier listM =
|
|
FunctionAlias (toAlias identifier) $
|
|
fmap (map (uncurry DefinitionListItem)) listM
|
|
|
|
instance ToSQL FunctionAlias where
|
|
toSQL (FunctionAlias iden (Just definitionList)) =
|
|
toSQL iden <> parenB (", " <+> definitionList)
|
|
toSQL (FunctionAlias iden Nothing) =
|
|
toSQL iden
|
|
|
|
data FunctionExp = FunctionExp
|
|
{ feName :: !QualifiedFunction,
|
|
feArgs :: !FunctionArgs,
|
|
feAlias :: !(Maybe FunctionAlias)
|
|
}
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData FunctionExp
|
|
|
|
instance Cacheable FunctionExp
|
|
|
|
instance Hashable FunctionExp
|
|
|
|
instance ToSQL FunctionExp where
|
|
toSQL (FunctionExp qf args alsM) =
|
|
toSQL qf <> toSQL args <~> toSQL alsM
|
|
|
|
data FromItem
|
|
= FISimple !QualifiedTable !(Maybe Alias)
|
|
| FIIdentifier !Identifier
|
|
| FIFunc !FunctionExp
|
|
| FIUnnest ![SQLExp] !Alias ![SQLExp]
|
|
| FISelect !Lateral !Select !Alias
|
|
| FISelectWith !Lateral !(SelectWithG Select) !Alias
|
|
| FIValues !ValuesExp !Alias !(Maybe [PGCol])
|
|
| FIJoin !JoinExpr
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData FromItem
|
|
|
|
instance Cacheable FromItem
|
|
|
|
instance Hashable FromItem
|
|
|
|
mkSelFromItem :: Select -> Alias -> FromItem
|
|
mkSelFromItem = FISelect (Lateral False)
|
|
|
|
mkSelectWithFromItem :: SelectWithG Select -> Alias -> FromItem
|
|
mkSelectWithFromItem = FISelectWith (Lateral False)
|
|
|
|
mkLateralFromItem :: Select -> Alias -> FromItem
|
|
mkLateralFromItem = FISelect (Lateral True)
|
|
|
|
toColTupExp :: [PGCol] -> SQLExp
|
|
toColTupExp =
|
|
SETuple . TupleExp . map (SEIdentifier . Identifier . getPGColTxt)
|
|
|
|
instance ToSQL FromItem where
|
|
toSQL (FISimple qt mal) =
|
|
toSQL qt <~> toSQL mal
|
|
toSQL (FIIdentifier iden) =
|
|
toSQL iden
|
|
toSQL (FIFunc funcExp) = toSQL funcExp
|
|
-- unnest(expressions) alias(columns)
|
|
toSQL (FIUnnest args als cols) =
|
|
"UNNEST" <> parenB (", " <+> args) <~> toSQL als <> parenB (", " <+> cols)
|
|
toSQL (FISelect mla sel al) =
|
|
toSQL mla <~> parenB (toSQL sel) <~> toSQL al
|
|
toSQL (FISelectWith mla selWith al) =
|
|
toSQL mla <~> parenB (toSQL selWith) <~> toSQL al
|
|
toSQL (FIValues valsExp al mCols) =
|
|
parenB (toSQL valsExp) <~> toSQL al
|
|
<~> toSQL (toColTupExp <$> mCols)
|
|
toSQL (FIJoin je) =
|
|
toSQL je
|
|
|
|
newtype Lateral = Lateral Bool
|
|
deriving (Show, Eq, Data, NFData, Cacheable, Hashable)
|
|
|
|
instance ToSQL Lateral where
|
|
toSQL (Lateral True) = "LATERAL"
|
|
toSQL (Lateral False) = mempty
|
|
|
|
data JoinExpr = JoinExpr
|
|
{ tjeLeft :: !FromItem,
|
|
tjeType :: !JoinType,
|
|
tjeRight :: !FromItem,
|
|
tjeJC :: !JoinCond
|
|
}
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData JoinExpr
|
|
|
|
instance Cacheable JoinExpr
|
|
|
|
instance Hashable JoinExpr
|
|
|
|
instance ToSQL JoinExpr where
|
|
toSQL je =
|
|
toSQL (tjeLeft je)
|
|
<~> toSQL (tjeType je)
|
|
<~> toSQL (tjeRight je)
|
|
<~> toSQL (tjeJC je)
|
|
|
|
data JoinType
|
|
= Inner
|
|
| LeftOuter
|
|
| RightOuter
|
|
| FullOuter
|
|
deriving (Eq, Show, Generic, Data)
|
|
|
|
instance NFData JoinType
|
|
|
|
instance Cacheable JoinType
|
|
|
|
instance Hashable JoinType
|
|
|
|
instance ToSQL JoinType where
|
|
toSQL Inner = "INNER JOIN"
|
|
toSQL LeftOuter = "LEFT OUTER JOIN"
|
|
toSQL RightOuter = "RIGHT OUTER JOIN"
|
|
toSQL FullOuter = "FULL OUTER JOIN"
|
|
|
|
data JoinCond
|
|
= JoinOn !BoolExp
|
|
| JoinUsing ![PGCol]
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData JoinCond
|
|
|
|
instance Cacheable JoinCond
|
|
|
|
instance Hashable JoinCond
|
|
|
|
instance ToSQL JoinCond where
|
|
toSQL (JoinOn be) =
|
|
"ON" <~> parenB (toSQL be)
|
|
toSQL (JoinUsing cols) =
|
|
"USING" <~> parenB ("," <+> cols)
|
|
|
|
data BoolExp
|
|
= BELit !Bool
|
|
| BEBin !BinOp !BoolExp !BoolExp
|
|
| BENot !BoolExp
|
|
| BECompare !CompareOp !SQLExp !SQLExp
|
|
| -- this is because l = (ANY (e)) is not valid
|
|
-- i.e, (ANY(e)) is not same as ANY(e)
|
|
BECompareAny !CompareOp !SQLExp !SQLExp
|
|
| BENull !SQLExp
|
|
| BENotNull !SQLExp
|
|
| BEExists !Select
|
|
| BEIN !SQLExp ![SQLExp]
|
|
| BEExp !SQLExp
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData BoolExp
|
|
|
|
instance Cacheable BoolExp
|
|
|
|
instance Hashable BoolExp
|
|
|
|
-- removes extraneous 'AND true's
|
|
simplifyBoolExp :: BoolExp -> BoolExp
|
|
simplifyBoolExp be = case be of
|
|
BEBin AndOp e1 e2 ->
|
|
let e1s = simplifyBoolExp e1
|
|
e2s = simplifyBoolExp e2
|
|
in if
|
|
| e1s == BELit True -> e2s
|
|
| e2s == BELit True -> e1s
|
|
| otherwise -> BEBin AndOp e1s e2s
|
|
BEBin OrOp e1 e2 ->
|
|
let e1s = simplifyBoolExp e1
|
|
e2s = simplifyBoolExp e2
|
|
in if
|
|
| e1s == BELit False -> e2s
|
|
| e2s == BELit False -> e1s
|
|
| otherwise -> BEBin OrOp e1s e2s
|
|
e -> e
|
|
|
|
mkExists :: FromItem -> BoolExp -> BoolExp
|
|
mkExists fromItem whereFrag =
|
|
BEExists
|
|
mkSelect
|
|
{ selExtr = [Extractor (SEUnsafe "1") Nothing],
|
|
selFrom = Just $ FromExp $ pure fromItem,
|
|
selWhere = Just $ WhereFrag whereFrag
|
|
}
|
|
|
|
instance ToSQL BoolExp where
|
|
toSQL (BELit True) = TB.text "'true'"
|
|
toSQL (BELit False) = TB.text "'false'"
|
|
toSQL (BEBin bo bel ber) =
|
|
parenB (toSQL bel) <~> toSQL bo <~> parenB (toSQL ber)
|
|
toSQL (BENot be) =
|
|
"NOT" <~> parenB (toSQL be)
|
|
toSQL (BECompare co vl vr) =
|
|
parenB (toSQL vl) <~> toSQL co <~> parenB (toSQL vr)
|
|
toSQL (BECompareAny co vl vr) =
|
|
parenB (toSQL vl) <~> toSQL co <~> "ANY" <> parenB (toSQL vr)
|
|
toSQL (BENull v) =
|
|
parenB (toSQL v) <~> "IS NULL"
|
|
toSQL (BENotNull v) =
|
|
parenB (toSQL v) <~> "IS NOT NULL"
|
|
toSQL (BEExists sel) =
|
|
"EXISTS " <~> parenB (toSQL sel)
|
|
-- special case to handle lhs IN (exp1, exp2)
|
|
toSQL (BEIN vl exps) =
|
|
parenB (toSQL vl) <~> toSQL SIN <~> parenB (", " <+> exps)
|
|
-- Any SQL expression which evaluates to bool value
|
|
toSQL (BEExp e) = parenB $ toSQL e
|
|
|
|
data BinOp = AndOp | OrOp
|
|
deriving (Show, Eq, Generic, Data)
|
|
|
|
instance NFData BinOp
|
|
|
|
instance Cacheable BinOp
|
|
|
|
instance Hashable BinOp
|
|
|
|
instance ToSQL BinOp where
|
|
toSQL AndOp = "AND"
|
|
toSQL OrOp = "OR"
|
|
|
|
data CompareOp
|
|
= SEQ
|
|
| SGT
|
|
| SLT
|
|
| SIN
|
|
| SNE
|
|
| SGTE
|
|
| SLTE
|
|
| SNIN
|
|
| SLIKE
|
|
| SNLIKE
|
|
| SILIKE
|
|
| SNILIKE
|
|
| SSIMILAR
|
|
| SNSIMILAR
|
|
| SREGEX
|
|
| SIREGEX
|
|
| SNREGEX
|
|
| SNIREGEX
|
|
| SContains
|
|
| SContainedIn
|
|
| SHasKey
|
|
| SHasKeysAny
|
|
| SHasKeysAll
|
|
| SMatchesFulltext
|
|
deriving (Eq, Generic, Data)
|
|
|
|
instance NFData CompareOp
|
|
|
|
instance Cacheable CompareOp
|
|
|
|
instance Hashable CompareOp
|
|
|
|
instance Show CompareOp where
|
|
show = \case
|
|
SEQ -> "="
|
|
SGT -> ">"
|
|
SLT -> "<"
|
|
SIN -> "IN"
|
|
SNE -> "<>"
|
|
SGTE -> ">="
|
|
SLTE -> "<="
|
|
SNIN -> "NOT IN"
|
|
SLIKE -> "LIKE"
|
|
SNLIKE -> "NOT LIKE"
|
|
SILIKE -> "ILIKE"
|
|
SNILIKE -> "NOT ILIKE"
|
|
SSIMILAR -> "SIMILAR TO"
|
|
SNSIMILAR -> "NOT SIMILAR TO"
|
|
SREGEX -> "~"
|
|
SIREGEX -> "~*"
|
|
SNREGEX -> "!~"
|
|
SNIREGEX -> "!~*"
|
|
SContains -> "@>"
|
|
SContainedIn -> "<@"
|
|
SHasKey -> "?"
|
|
SHasKeysAny -> "?|"
|
|
SHasKeysAll -> "?&"
|
|
SMatchesFulltext -> "@"
|
|
|
|
instance ToSQL CompareOp where
|
|
toSQL = fromString . show
|
|
|
|
data SQLDelete = SQLDelete
|
|
{ delTable :: !QualifiedTable,
|
|
delUsing :: !(Maybe UsingExp),
|
|
delWhere :: !(Maybe WhereFrag),
|
|
delRet :: !(Maybe RetExp)
|
|
}
|
|
deriving (Show, Eq)
|
|
|
|
data SQLUpdate = SQLUpdate
|
|
{ upTable :: !QualifiedTable,
|
|
upSet :: !SetExp,
|
|
upFrom :: !(Maybe FromExp),
|
|
upWhere :: !(Maybe WhereFrag),
|
|
upRet :: !(Maybe RetExp)
|
|
}
|
|
deriving (Show, Eq)
|
|
|
|
newtype SetExp = SetExp [SetExpItem]
|
|
deriving (Show, Eq)
|
|
|
|
newtype SetExpItem = SetExpItem (PGCol, SQLExp)
|
|
deriving (Show, Eq)
|
|
|
|
buildUpsertSetExp ::
|
|
[PGCol] ->
|
|
HM.HashMap PGCol SQLExp ->
|
|
SetExp
|
|
buildUpsertSetExp cols preSet =
|
|
SetExp $ map SetExpItem $ HM.toList setExps
|
|
where
|
|
setExps = HM.union preSet $
|
|
HM.fromList $
|
|
flip map cols $ \col ->
|
|
(col, SEExcluded $ toIdentifier col)
|
|
|
|
newtype UsingExp = UsingExp [TableName]
|
|
deriving (Show, Eq)
|
|
|
|
instance ToSQL UsingExp where
|
|
toSQL (UsingExp tables) =
|
|
"USING" <~> "," <+> tables
|
|
|
|
newtype RetExp = RetExp [Extractor]
|
|
deriving (Show, Eq)
|
|
|
|
selectStar :: Extractor
|
|
selectStar = Extractor (SEStar Nothing) Nothing
|
|
|
|
selectStar' :: Qual -> Extractor
|
|
selectStar' q = Extractor (SEStar (Just q)) Nothing
|
|
|
|
returningStar :: RetExp
|
|
returningStar = RetExp [selectStar]
|
|
|
|
instance ToSQL RetExp where
|
|
toSQL (RetExp []) =
|
|
mempty
|
|
toSQL (RetExp exps) =
|
|
"RETURNING" <~> (", " <+> exps)
|
|
|
|
instance ToSQL SQLDelete where
|
|
toSQL sd =
|
|
"DELETE FROM"
|
|
<~> toSQL (delTable sd)
|
|
<~> toSQL (delUsing sd)
|
|
<~> toSQL (delWhere sd)
|
|
<~> toSQL (delRet sd)
|
|
|
|
instance ToSQL SQLUpdate where
|
|
toSQL a =
|
|
"UPDATE"
|
|
<~> toSQL (upTable a)
|
|
<~> toSQL (upSet a)
|
|
<~> toSQL (upFrom a)
|
|
<~> toSQL (upWhere a)
|
|
<~> toSQL (upRet a)
|
|
|
|
instance ToSQL SetExp where
|
|
toSQL (SetExp cvs) =
|
|
"SET" <~> ("," <+> cvs)
|
|
|
|
instance ToSQL SetExpItem where
|
|
toSQL (SetExpItem (col, val)) =
|
|
toSQL col <~> "=" <~> toSQL val
|
|
|
|
data SQLConflictTarget
|
|
= SQLColumn ![PGCol]
|
|
| SQLConstraint !ConstraintName
|
|
deriving (Show, Eq)
|
|
|
|
instance ToSQL SQLConflictTarget where
|
|
toSQL (SQLColumn cols) =
|
|
"("
|
|
<~> ("," <+> cols)
|
|
<~> ")"
|
|
toSQL (SQLConstraint cons) = "ON CONSTRAINT" <~> toSQL cons
|
|
|
|
data SQLConflict
|
|
= DoNothing !(Maybe SQLConflictTarget)
|
|
| Update !SQLConflictTarget !SetExp !(Maybe WhereFrag)
|
|
deriving (Show, Eq)
|
|
|
|
instance ToSQL SQLConflict where
|
|
toSQL (DoNothing Nothing) = "ON CONFLICT DO NOTHING"
|
|
toSQL (DoNothing (Just ct)) =
|
|
"ON CONFLICT"
|
|
<~> toSQL ct
|
|
<~> "DO NOTHING"
|
|
toSQL (Update ct set whr) =
|
|
"ON CONFLICT"
|
|
<~> toSQL ct
|
|
<~> "DO UPDATE"
|
|
<~> toSQL set
|
|
<~> toSQL whr
|
|
|
|
newtype ValuesExp
|
|
= ValuesExp [TupleExp]
|
|
deriving (Show, Eq, Data, NFData, Cacheable, Hashable)
|
|
|
|
instance ToSQL ValuesExp where
|
|
toSQL (ValuesExp tuples) =
|
|
"VALUES" <~> (", " <+> tuples)
|
|
|
|
data SQLInsert = SQLInsert
|
|
{ siTable :: !QualifiedTable,
|
|
siCols :: ![PGCol],
|
|
siValues :: !ValuesExp,
|
|
siConflict :: !(Maybe SQLConflict),
|
|
siRet :: !(Maybe RetExp)
|
|
}
|
|
deriving (Show, Eq)
|
|
|
|
instance ToSQL SQLInsert where
|
|
toSQL si =
|
|
"INSERT INTO"
|
|
<~> toSQL (siTable si)
|
|
<~> "("
|
|
<~> (", " <+> siCols si)
|
|
<~> ")"
|
|
<~> toSQL (siValues si)
|
|
<~> maybe "" toSQL (siConflict si)
|
|
<~> toSQL (siRet si)
|
|
|
|
data CTE
|
|
= CTESelect !Select
|
|
| CTEInsert !SQLInsert
|
|
| CTEUpdate !SQLUpdate
|
|
| CTEDelete !SQLDelete
|
|
deriving (Show, Eq)
|
|
|
|
instance ToSQL CTE where
|
|
toSQL = \case
|
|
CTESelect q -> toSQL q
|
|
CTEInsert q -> toSQL q
|
|
CTEUpdate q -> toSQL q
|
|
CTEDelete q -> toSQL q
|
|
|
|
data SelectWithG v = SelectWith
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{ swCTEs :: ![(Alias, v)],
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swSelect :: !Select
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}
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deriving (Show, Eq, Generic, Data)
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instance (NFData v) => NFData (SelectWithG v)
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instance (Cacheable v) => Cacheable (SelectWithG v)
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instance (Hashable v) => Hashable (SelectWithG v)
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instance (ToSQL v) => ToSQL (SelectWithG v) where
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toSQL (SelectWith ctes sel) =
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"WITH " <> (", " <+> map f ctes) <~> toSQL sel
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where
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f (Alias al, q) = toSQL al <~> "AS" <~> parenB (toSQL q)
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type SelectWith = SelectWithG CTE
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-- local helpers
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infixr 6 <+>
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(<+>) :: (ToSQL a) => Text -> [a] -> TB.Builder
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(<+>) _ [] = mempty
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(<+>) kat (x : xs) =
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toSQL x <> mconcat [TB.text kat <> toSQL x' | x' <- xs]
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{-# INLINE (<+>) #-}
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