Copyright	2013-2018 Kei Hibino
License	BSD3
Maintainer	ex8k.hibino@gmail.com
Stability	experimental
Portability	unknown
Safe Haskell	Safe-Inferred
Language	Haskell2010

Database.HDBC.Session

Contents

Bracketed session
Show errors
Deprecated

Description

This module provides a base bracketed function to call close correctly against opend DB connection.

Synopsis

transaction :: IConnection conn => IO conn -> (conn -> IO a) -> IO a
withConnectionIO :: IConnection conn => IO conn -> (conn -> IO a) -> IO a
withConnectionIO_ :: IConnection conn => IO conn -> (conn -> IO a) -> IO a
bracketConnection :: (Monad m, IConnection conn) => (forall c. m c -> (c -> m ()) -> (c -> m a) -> m a) -> (forall b. IO b -> m b) -> IO conn -> (conn -> m a) -> m a
showSqlError :: SqlError -> String
handleSqlError' :: IO a -> IO a
withConnection :: (Monad m, IConnection conn) => (forall c. m c -> (c -> m ()) -> (c -> m a) -> m a) -> (forall b. IO b -> m b) -> IO conn -> (conn -> m a) -> m a
withConnectionIO' :: IConnection conn => IO conn -> (conn -> IO a) -> IO a
withConnectionCommit :: IConnection conn => IO conn -> (conn -> IO a) -> IO a

Bracketed session

Bracket function implementation is provided by several packages, so this package provides base implementation which requires bracket function and corresponding lift function.

transaction Source #

Arguments

:: IConnection conn
=> IO conn	Connect action
-> (conn -> IO a)	Transaction body
-> IO a	Result transaction action

Run a transaction on a HDBC IConnection and commit at last, and then close the connection. In other words, the transaction with no exception is committed. Handy definition for simple transactions.

withConnectionIO Source #

Arguments

:: IConnection conn
=> IO conn	Connect action
-> (conn -> IO a)	Transaction body
-> IO a	Result transaction action

Run a transaction on a HDBC IConnection and close the connection. Not issuing commit at last, so if you need, issue commit manually in transaction body.

withConnectionIO_ Source #

Arguments

:: IConnection conn
=> IO conn	Connect action
-> (conn -> IO a)	Transaction body
-> IO a	Result transaction action

Same as withConnectionIO other than not wrapping transaction body in handleSqlError'.

bracketConnection Source #

Arguments

:: (Monad m, IConnection conn)
=> (forall c. m c -> (c -> m ()) -> (c -> m a) -> m a)	bracket
-> (forall b. IO b -> m b)	lift
-> IO conn	Connect action
-> (conn -> m a)	Transaction body
-> m a

Generalized session with bracketed HDBC connection. Run a transaction on a HDBC IConnection and close the connection.

Show errors

Functions to show SqlError type not to show String fields.

showSqlError :: SqlError -> String Source #

show SqlError not to show String fields.

handleSqlError' :: IO a -> IO a Source #

Like handleSqlError, but not to show String fields of SqlError.

Deprecated

withConnection :: (Monad m, IConnection conn) => (forall c. m c -> (c -> m ()) -> (c -> m a) -> m a) -> (forall b. IO b -> m b) -> IO conn -> (conn -> m a) -> m a Source #

Deprecated: use bracketConnection instead of this.

Deprecated. use bracketConnection instead of this.

withConnectionIO' Source #

Arguments

:: IConnection conn
=> IO conn	Connect action
-> (conn -> IO a)	Transaction body
-> IO a	Result transaction action

Deprecated: use withConnectionIO instead of this.

Deprecated. use withConnectionIO instead of this.

withConnectionCommit Source #

Arguments

:: IConnection conn
=> IO conn	Connect action
-> (conn -> IO a)	Transaction body
-> IO a	Result transaction action

Deprecated: use transaction instead of this.

Deprecated. use transaction instead of this.