| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Database.PostgreSQL.PQTypes.Utils
- raw :: RawSQL () -> SQL
- runQuery_ :: (IsSQL sql, MonadDB m) => sql -> m ()
- runQuery01 :: (IsSQL sql, MonadDB m, MonadThrow m) => sql -> m Bool
- runQuery01_ :: (IsSQL sql, MonadDB m, MonadThrow m) => sql -> m ()
- runSQL :: MonadDB m => SQL -> m Int
- runSQL_ :: MonadDB m => SQL -> m ()
- runSQL01 :: (MonadDB m, MonadThrow m) => SQL -> m Bool
- runSQL01_ :: (MonadDB m, MonadThrow m) => SQL -> m ()
- fetchMany :: (MonadDB m, FromRow row) => (row -> t) -> m [t]
- fetchMaybe :: (MonadDB m, MonadThrow m, FromRow row) => (row -> t) -> m (Maybe t)
- fetchOne :: (MonadDB m, MonadThrow m, FromRow row) => (row -> t) -> m t
- hpqTypesError :: String -> IO a
Documentation
runQuery_ :: (IsSQL sql, MonadDB m) => sql -> m () Source
Specialization of runQuery that discards the result.
runQuery01 :: (IsSQL sql, MonadDB m, MonadThrow m) => sql -> m Bool Source
Specialization of runQuery that checks whether affected/returned
number of rows is in range [0, 1] and returns appropriate Bool value.
Otherwise, AffectedRowsMismatch exception is thrown.
runQuery01_ :: (IsSQL sql, MonadDB m, MonadThrow m) => sql -> m () Source
Specialization of runQuery01 that discards the result.
runSQL01 :: (MonadDB m, MonadThrow m) => SQL -> m Bool Source
Specialization of runQuery01 to SQL type.
runSQL01_ :: (MonadDB m, MonadThrow m) => SQL -> m () Source
Specialization of runQuery01_ to SQL type.
fetchMany :: (MonadDB m, FromRow row) => (row -> t) -> m [t] Source
Specialization of foldrM that fetches list of rows.
fetchMaybe :: (MonadDB m, MonadThrow m, FromRow row) => (row -> t) -> m (Maybe t) Source
Specialization of foldlM that fetches one or zero rows. If more
rows are delivered, AffectedRowsMismatch exception is thrown.
fetchOne :: (MonadDB m, MonadThrow m, FromRow row) => (row -> t) -> m t Source
Specialization of foldlM that fetches exactly one row. If different
number of rows is delivered, AffectedRowsMismatch exception is thrown.
hpqTypesError :: String -> IO a Source
Throw 'HPQTypesError exception.