Safe Haskell	None
Language	Haskell2010

Database.PostgreSQL.PQTypes.SQL.Class

Synopsis

data SomeSQL = IsSQL sql => SomeSQL sql
class Show sql => IsSQL sql where
- withSQL :: sql -> ParamAllocator -> (Ptr PGparam -> CString -> IO r) -> IO r
unsafeSQL :: (IsSQL sql, IsString sql) => String -> sql

Documentation

data SomeSQL Source #

Container for SQL-like type storage.

Constructors

IsSQL sql => SomeSQL sql

class Show sql => IsSQL sql where Source #

Class representing "SQLness" of a given type.

Methods

withSQL Source #

Arguments

:: sql
-> ParamAllocator	`PGparam` allocator.
-> (Ptr PGparam -> CString -> IO r)	Continuation which takes `sql` converted to libpqtypes specific representation, ie. `PGparam` object containing query parameters and C string containing the query itself.
-> IO r

Convert sql to libpqtypes representation and pass it to supplied continuation (usually for execution).

Instances

IsSQL SQL Source #
Instance details Defined in Database.PostgreSQL.PQTypes.SQL Methods withSQL :: SQL -> ParamAllocator -> (Ptr PGparam -> CString -> IO r) -> IO r Source #
(Show row, ToRow row) => IsSQL (RawSQL row) Source #
Instance details Defined in Database.PostgreSQL.PQTypes.SQL.Raw Methods withSQL :: RawSQL row -> ParamAllocator -> (Ptr PGparam -> CString -> IO r) -> IO r Source #

unsafeSQL :: (IsSQL sql, IsString sql) => String -> sql Source #

Convert unsafely from String to sql (Note: reckless usage of this function may introduce security vulnerabilities such as proneness to SQL injection attacks).