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56 lines
2.2 KiB
Haskell
56 lines
2.2 KiB
Haskell
module Hasura.Backends.Postgres.Translate.Update
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( mkUpdateCTE
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) where
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import Hasura.Prelude
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import qualified Hasura.Backends.Postgres.SQL.DML as S
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import Hasura.Backends.Postgres.SQL.Types
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import Hasura.Backends.Postgres.Translate.BoolExp
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import Hasura.Backends.Postgres.Translate.Insert
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import Hasura.Backends.Postgres.Translate.Returning
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import Hasura.RQL.IR.Update
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import Hasura.RQL.Types
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import Hasura.SQL.Types
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mkUpdateCTE
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:: Backend ('Postgres pgKind)
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=> AnnUpd ('Postgres pgKind)
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-> S.CTE
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mkUpdateCTE (AnnUpd tn opExps (permFltr, wc) chk _ columnsInfo) =
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S.CTEUpdate update
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where
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update =
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S.SQLUpdate tn setExp Nothing tableFltr
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. Just
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. S.RetExp
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$ [ S.selectStar
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, asCheckErrorExtractor $ insertCheckConstraint checkExpr
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]
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setExp = S.SetExp $ map (expandOperator columnsInfo) opExps
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tableFltr = Just $ S.WhereFrag tableFltrExpr
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tableFltrExpr = toSQLBoolExp (S.QualTable tn) $ andAnnBoolExps permFltr wc
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checkExpr = toSQLBoolExp (S.QualTable tn) chk
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expandOperator :: [ColumnInfo ('Postgres pgKind)] -> (PGCol, UpdOpExpG S.SQLExp) -> S.SetExpItem
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expandOperator infos (column, op) = S.SetExpItem $ (column,) $ case op of
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UpdSet e -> e
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UpdInc e -> S.mkSQLOpExp S.incOp identifier (asNum e)
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UpdAppend e -> S.mkSQLOpExp S.jsonbConcatOp identifier (asJSON e)
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UpdPrepend e -> S.mkSQLOpExp S.jsonbConcatOp (asJSON e) identifier
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UpdDeleteKey e -> S.mkSQLOpExp S.jsonbDeleteOp identifier (asText e)
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UpdDeleteElem e -> S.mkSQLOpExp S.jsonbDeleteOp identifier (asInt e)
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UpdDeleteAtPath a -> S.mkSQLOpExp S.jsonbDeleteAtPathOp identifier (asArray a)
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where
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identifier = S.SEIdentifier $ toIdentifier column
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asInt e = S.SETyAnn e S.intTypeAnn
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asText e = S.SETyAnn e S.textTypeAnn
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asJSON e = S.SETyAnn e S.jsonbTypeAnn
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asArray a = S.SETyAnn (S.SEArray a) S.textArrTypeAnn
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asNum e = S.SETyAnn e $
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case find (\info -> pgiColumn info == column) infos <&> pgiType of
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Just (ColumnScalar s) -> S.mkTypeAnn $ CollectableTypeScalar s
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_ -> S.numericTypeAnn
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