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Bump Opaleye dependency to 0.7.2.0 to take advantage of new EXISTS support
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@ -5,10 +5,10 @@
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"homepage": "https://input-output-hk.github.io/haskell.nix",
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"owner": "input-output-hk",
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"repo": "haskell.nix",
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"rev": "5b5a18e442df6e27ad8549d69b8868b62adb08c3",
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"sha256": "055mk7kmjppng66ppnb8kr96v4wwc8pcxfsls5gl77129hsz9aph",
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"rev": "e7bb8ab2921a11a1d014c70a87898f73e086594d",
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"sha256": "17c0xqzwnchcy71p8372cydcxc7qf0i8x12d0lf6p1g8yd4al6fa",
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"type": "tarball",
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"url": "https://github.com/input-output-hk/haskell.nix/archive/5b5a18e442df6e27ad8549d69b8868b62adb08c3.tar.gz",
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"url": "https://github.com/input-output-hk/haskell.nix/archive/e7bb8ab2921a11a1d014c70a87898f73e086594d.tar.gz",
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"url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
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},
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"niv": {
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@ -25,7 +25,7 @@ library
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, case-insensitive
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, contravariant
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, hasql ^>= 1.4.5.1
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, opaleye ^>= 0.7.1.0
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, opaleye ^>= 0.7.2.0
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, profunctors
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, scientific
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, semialign
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@ -11,23 +11,21 @@ where
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import Prelude hiding ( filter )
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-- opaleye
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import qualified Opaleye.Operators as Opaleye
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import qualified Opaleye.Exists as Opaleye
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import qualified Opaleye.Operators as Opaleye hiding ( exists )
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-- rel8
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import Rel8.Expr ( Expr )
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import Rel8.Expr.Opaleye ( fromColumn, fromPrimExpr )
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import Rel8.Query ( Query )
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import Rel8.Query.Filter ( filter )
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import Rel8.Query.Maybe ( optional )
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import Rel8.Query.Opaleye ( mapOpaleye )
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import Rel8.Table.Eq ( EqTable, (==:) )
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import Rel8.Table.Maybe ( isJustTable )
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-- | Checks if a query returns at least one row.
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exists :: Query a -> Query (Expr Bool)
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exists = fmap isJustTable . optional . present
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-- FIXME: change this when b7aacc07c6392654cae439fc3b997620c3aa7a87 makes it
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-- into a release of Opaleye
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exists = fmap (fromPrimExpr . fromColumn) . mapOpaleye Opaleye.exists
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inQuery :: EqTable a => a -> Query a -> Query (Expr Bool)
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