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 ViewColumnMaker String (Column a)

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

Default Binaryspec (Column a) (Column a)

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 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