Database.PostgreSQL.PQTypes.Internal.C.Interface

Exports a set of FFI-imported libpq/libpqtypes functions.

libpq imports

c_PQfreemem :: Ptr a -> IO ()

c_PQstatus :: Ptr PGconn -> IO ConnStatusType

c_PQerrorMessage :: Ptr PGconn -> IO CString

c_PQsetClientEncoding :: Ptr PGconn -> CString -> IO CInt

Safe as it sends a query to the server.

c_PQsocket :: Ptr PGconn -> IO Fd

c_PQconsumeInput :: Ptr PGconn -> IO CInt

Safe as it reads data from a socket.

c_PQresultStatus :: Ptr PGresult -> IO ExecStatusType

c_PQresultErrorField :: Ptr PGresult -> ErrorField -> IO CString

c_PQresultErrorMessage :: Ptr PGresult -> IO CString

c_PQntuples :: Ptr PGresult -> IO CInt

c_PQnfields :: Ptr PGresult -> IO CInt

c_PQcmdTuples :: Ptr PGresult -> IO CString

c_PQgetisnull :: Ptr PGresult -> CInt -> CInt -> IO CInt

c_PQfname :: Ptr PGresult -> CInt -> IO CString

c_PQclear :: Ptr PGresult -> IO ()

Safe as it performs multiple actions when clearing the result.

c_PQcancel :: Ptr PGconn -> IO (Maybe String)

Attempt to cancel currently running query. If the request is successfully dispatched Nothing is returned, otherwise a textual explanation of what happened.

c_PQconnectStart :: CString -> IO (Ptr PGconn)

Safe as it might make a DNS lookup.

c_PQconnectPoll :: Ptr PGconn -> IO PostgresPollingStatusType

Safe as it reads data from a socket.

c_PQfinish :: Ptr PGconn -> IO ()

Safe as it sends a terminate command to the server.

libpqtypes imports

c_PQinitTypes :: Ptr PGconn -> IO ()

Safe as it calls PQregisterEventProc with a nontrivial callback.

c_PQregisterTypes :: Ptr PGconn -> Ptr PGerror -> TypeClass -> Ptr PGregisterType -> CInt -> CInt -> IO CInt

Safe as it sends a query to the server.

c_PQparamExec :: Ptr PGconn -> Ptr PGerror -> Ptr PGparam -> CString -> ResultFormat -> IO (ForeignPtr PGresult)

Safe wrapper for c_rawPQparamExec. Wraps result returned by c_rawPQparamExec in ForeignPtr with asynchronous exceptions masked to prevent memory leaks.

c_PQparamPrepare :: Ptr PGconn -> Ptr PGerror -> Ptr PGparam -> CString -> CString -> IO (ForeignPtr PGresult)

Safe wrapper for c_rawPQprepare. Wraps result returned by c_rawPQprepare in ForeignPtr with asynchronous exceptions masked to prevent memory leaks.

c_PQparamExecPrepared :: Ptr PGconn -> Ptr PGerror -> Ptr PGparam -> CString -> ResultFormat -> IO (ForeignPtr PGresult)

Safe wrapper for c_rawPQparamExecPrepared. Wraps result returned by c_rawPQparamExecPrepared in ForeignPtr with asynchronous exceptions masked to prevent memory leaks.

c_PQparamCreate :: Ptr PGconn -> Ptr PGerror -> IO (Ptr PGparam)

c_PQparamClear :: Ptr PGparam -> IO ()

c_PQparamCount :: Ptr PGparam -> IO CInt

misc imports

nullStringCStringLen :: CStringLen