Hasql.Postgres

Documentation

data Postgres

Settings of a Postgres backend.

Constructors

Postgres

Fields

host :: ByteString

port :: Word16

user :: Text

password :: Text

database :: Text

Instances

Backend Postgres

Mapping Postgres Bool

Mapping Postgres Char

Mapping Postgres Double

Mapping Postgres Float

Mapping Postgres Int

Mapping Postgres Int8

Mapping Postgres Int16

Mapping Postgres Int32

Mapping Postgres Int64

Mapping Postgres Word

Mapping Postgres Word8

Mapping Postgres Word16

Mapping Postgres Word32

Mapping Postgres Word64

Mapping Postgres ByteString

Mapping Postgres Text

Mapping Postgres Scientific

Mapping Postgres LocalTime

Mapping Postgres ZonedTime

Mapping Postgres TimeOfDay

Mapping Postgres UTCTime

Mapping Postgres Day

(Mapping Postgres a, Renderable a, Parsable a, OIDMapping a) => Mapping Postgres [a]

Maps to Postgres arrays.

Please note that since String is just an alias to [Char], it will be mapped to an array of characters. If you want to map to a textual type use Text instead.

Mapping Postgres a => Mapping Postgres (Maybe a)

Maps to the same type as the underlying value, encoding the Nothing as NULL.

(Mapping Postgres a, Renderable a, Parsable a, OIDMapping a) => Mapping Postgres (Vector a)

data Connection Postgres = Connection {

• connection :: !Connection
• preparer :: !StatementPreparer
• transactionState :: !(IORef (Maybe Word))

}

data Result Postgres = Result {

• unpackResult :: Maybe ByteString

}

data StatementArgument Postgres = StatementArgument {

• unpackStatementArgument :: (Oid, Maybe (ByteString, Format))

}