Opaleye.Constant

Documentation

newtype Constant haskells columns

Constructors

Constant

Fields

constantExplicit :: haskells -> columns

Instances

ProductProfunctor Constant

SumProfunctor Constant

Profunctor Constant

Default Constant Bool (Column PGBool)

Default Constant Double (Column PGFloat8)

Default Constant Int (Column PGInt4)

Default Constant Int64 (Column PGInt8)

Default Constant String (Column PGText)

Default Constant ByteString (Column PGJsonb)

Default Constant ByteString (Column PGJson)

Default Constant ByteString (Column PGBytea)

Default Constant ByteString (Column PGJsonb)

Default Constant ByteString (Column PGJson)

Default Constant ByteString (Column PGBytea)

Default Constant Text (Column PGText)

Default Constant UTCTime (Column PGTimestamptz)

Default Constant Text (Column PGText)

Default Constant LocalTime (Column PGTimestamp)

Default Constant TimeOfDay (Column PGTime)

Default Constant Day (Column PGDate)

Default Constant UUID (Column PGUuid)

Default Constant haskell (Column sql) => Default Constant (Maybe haskell) (Column (Nullable sql))

Default Constant (CI Text) (Column PGCitext)

Default Constant (CI Text) (Column PGCitext)

Functor (Constant a)

Applicative (Constant a)

constant :: Default Constant haskells columns => haskells -> columns