Opaleye.SQLite.Internal.Column

Documentation

newtype Column a

The Num and Fractional instances for Column a are too general. For example, they allow you to add two Column Strings. This will be fixed in a subsequent release.

Constructors

Column PrimExpr

Instances

Default Constant Bool (Column SqlBool)

Default Constant Double (Column SqlReal)

Default Constant Int (Column SqlInt)

Default Constant String (Column SqlText)

Default Constant Text (Column SqlText)

Default Constant Text (Column SqlText)

Default ViewColumnMaker String (Column a)

QueryRunnerColumnDefault a b => Default QueryRunner (Column a) b

Default Binaryspec (Column a) (Column a)

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

Default Unpackspec (Column a) (Column a)

Default Valuesspec (Column PGInt4) (Column PGInt4)

Default NullMaker (Column a) (Column (Nullable a))

Default NullMaker (Column (Nullable a)) (Column (Nullable a))

Default ColumnMaker (Column a) (Column a)

Default Distinctspec (Column a) (Column a)

(PGNum a, PGFractional a) => Fractional (Column a)

PGNum a => Num (Column a)

Show (Column a)

data Nullable a

Constructors

Nullable

Instances

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

Default NullMaker (Column a) (Column (Nullable a))

Default NullMaker (Column (Nullable a)) (Column (Nullable a))

QueryRunnerColumnDefault a b => QueryRunnerColumnDefault (Nullable a) (Maybe b)

unColumn :: Column a -> PrimExpr

unsafeCoerce :: Column a -> Column b

Deprecated: Use unsafeCoerceColumn instead

unsafeCoerceColumn :: Column a -> Column b

binOp :: BinOp -> Column a -> Column b -> Column c

unOp :: UnOp -> Column a -> Column b

unsafeCase_ :: [(Column pgBool, Column a)] -> Column a -> Column a

unsafeIfThenElse :: Column pgBool -> Column a -> Column a -> Column a

unsafeGt :: Column a -> Column a -> Column pgBool

unsafeEq :: Column a -> Column a -> Column pgBool

class PGNum a where

Methods

pgFromInteger :: Integer -> Column a

Instances

PGNum PGInt4

PGNum PGInt8

PGNum PGFloat8

class PGFractional a where

Methods

pgFromRational :: Rational -> Column a

Instances

PGFractional PGFloat8

unsafeCast :: String -> Column a -> Column b