Hasql.Interpolate.Internal.TH

Documentation

sql :: QuasiQuoter

QuasiQuoter that supports interpolation and splices. Produces a Sql.

#{..} interpolates a haskell expression into a sql query.

example1 :: EncodeValue a => a -> Sql
example1 x = [sql| select #{x} |]

^{..} introduces a splice, which allows us to inject a sql snippet along with the associated parameters into another sql snippet.

example2 :: Sql
example2 = [sql| ^{example1 True} where true |]

addParam :: State Int Builder

parseSqlExpr :: String -> Either (ParseErrorBundle String Void) SqlExpr

compileSqlExpr :: SqlExpr -> Q Exp

data SqlExpr

Constructors

SqlExpr

Fields

• sqlBuilderExp :: [SqlBuilderExp]
• paramEncoder :: [ParamEncoder]
• spliceBinds :: [SpliceBind]
• bindCount :: Int

Instances

Show SqlExpr

Defined in Hasql.Interpolate.Internal.TH

Methods

showsPrec :: Int -> SqlExpr -> ShowS

show :: SqlExpr -> String

showList :: [SqlExpr] -> ShowS

Eq SqlExpr

Defined in Hasql.Interpolate.Internal.TH

Methods

(==) :: SqlExpr -> SqlExpr -> Bool

(/=) :: SqlExpr -> SqlExpr -> Bool

data SqlBuilderExp

Constructors

Sbe'Var Int

Sbe'Param

Sbe'Quote String

Sbe'Ident String

Sbe'DollarQuote String String

Sbe'Cquote String

Sbe'Sql String

Instances

Show SqlBuilderExp

Defined in Hasql.Interpolate.Internal.TH

Methods

showsPrec :: Int -> SqlBuilderExp -> ShowS

show :: SqlBuilderExp -> String

showList :: [SqlBuilderExp] -> ShowS

Eq SqlBuilderExp

Defined in Hasql.Interpolate.Internal.TH

Methods

(==) :: SqlBuilderExp -> SqlBuilderExp -> Bool

(/=) :: SqlBuilderExp -> SqlBuilderExp -> Bool

data ParamEncoder

Constructors

Pe'Exp Exp

Pe'Var Int

Instances

Show ParamEncoder

Defined in Hasql.Interpolate.Internal.TH

Methods

showsPrec :: Int -> ParamEncoder -> ShowS

show :: ParamEncoder -> String

showList :: [ParamEncoder] -> ShowS

Eq ParamEncoder

Defined in Hasql.Interpolate.Internal.TH

Methods

(==) :: ParamEncoder -> ParamEncoder -> Bool

(/=) :: ParamEncoder -> ParamEncoder -> Bool

data SpliceBind

Constructors

SpliceBind

Fields

• sbBuilder :: Int
• sbParamEncoder :: Int
• sbExp :: Exp

Instances

Show SpliceBind

Defined in Hasql.Interpolate.Internal.TH

Methods

showsPrec :: Int -> SpliceBind -> ShowS

show :: SpliceBind -> String

showList :: [SpliceBind] -> ShowS

Eq SpliceBind

Defined in Hasql.Interpolate.Internal.TH

Methods

(==) :: SpliceBind -> SpliceBind -> Bool

(/=) :: SpliceBind -> SpliceBind -> Bool