PostgreSQL-0.1: Thin wrapper over the C postgresql library Source code Contents Index

Database.PostgreSQL

Documentation

newtype DatabaseT m a Source

Constructors DatabaseT (StateT DatabaseHandle m a) Instances (MonadIO m, Error e, MonadError e m) => MonadDatabase e (DatabaseT m) MonadError e m => MonadError e (DatabaseT m) ??? a m => Monad (DatabaseT m a) ??? a m => MonadIO (DatabaseT m a) ??? a m => MonadTrans (DatabaseT m a)

class (MonadIO m, Error e, MonadError e m) => MonadDatabase e m where Source

Methods getConnection :: m DatabaseHandle Source Instances (MonadIO m, Error e, MonadError e m) => MonadDatabase e (DatabaseT m) (MonadIO (t m), MonadError e (t m), MonadTrans t, MonadDatabase e m, Monad (t m)) => MonadDatabase e (t m)

data PGconn Source

newtype DatabaseHandle Source

Constructors DatabaseHandle (Ptr PGconn)

pqConnectDB :: CString -> IO (Ptr PGconn) Source

type ConnStatusType = Word32 Source

connection_OK :: ConnStatusType Source

connection_bad :: ConnStatusType Source

pqStatus :: Ptr PGconn -> IO ConnStatusType Source

pqErrorMessage :: Ptr PGconn -> IO CString Source

data PGresult Source

pqExec :: Ptr PGconn -> CString -> IO (Ptr PGresult) Source

execute :: MonadDatabase e m => String -> m () Source

type Oid = Word32 Source

withCStrings :: [String] -> (Ptr CString -> IO a) -> IO a Source

pqExecParams :: Ptr PGconn -> CString -> CInt -> Ptr Oid -> Ptr CString -> Ptr CInt -> Ptr CInt -> CInt -> IO (Ptr PGresult) Source

execParams :: MonadDatabase e m => String -> [String] -> m () Source

type ExecStatusType = Word32 Source

pgres_empty_query :: ExecStatusType Source

pgres_command_OK :: ExecStatusType Source

pgres_tuples_OK :: ExecStatusType Source

pqResultStatus :: Ptr PGresult -> IO ExecStatusType Source

pqResStatus :: ExecStatusType -> IO CString Source

pqResultErrorMessage :: Ptr PGresult -> IO CString Source

checkResultStatus :: MonadDatabase e m => String -> IO (Ptr PGresult) -> m () Source

pqFinish :: Ptr PGconn -> IO () Source

withDatabaseRaw :: MonadIO m => String -> DatabaseT m a -> m a Source

data ConnectionInfo Source

Constructors ConnectionInfo host :: (Maybe String) hostaddr :: (Maybe String) port :: (Maybe String) dbname :: (Maybe String) user :: (Maybe String) password :: (Maybe String) connect_timeout :: (Maybe String) options :: (Maybe String) sslmode :: (Maybe String) service :: (Maybe String)

defaultConnectionInfo :: ConnectionInfo Source

withDatabase :: MonadIO m => ConnectionInfo -> DatabaseT m a -> m a Source

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