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{- |
Module : Database.HDBC.MySQL
Copyright : Copyright (c) 2009-2010 Chris Waterson
License : LGPL
Maintainer :
Stability : experimental
Portability : GHC
This module provides a MySQL driver for the HDBC database interface.
To use it, invoke the 'connectMySQL' method to create an
@Database.HDBC.IConnection@ that you can use to interact with a MySQL
database. Use the 'defaultMySQLConnectInfo', overriding the default
values as necessary.
import Control.Monad
import Database.HDBC
import Database.HDBC.MySQL
main = do
rows <- 'withRTSSignalsBlocked' $ do
conn <- 'connectMySQL' 'defaultMySQLConnectInfo' {
'mysqlHost' = \"\",
'mysqlUser' = \"scott\",
'mysqlPassword' = \"tiger\"
'quickQuery'' conn \"SELECT 1 + 1\" []
forM_ rows $ \\row -> putStrLn $ show row
There are some important caveats to note about this driver.
* RTS signals. If you are writing an application that links against GHC's
threaded runtime (as most server-side applications do), you must use
'withRTSSignalsBlocked' to defend the @mysqlclient@ library against the
signals the RTS uses, or you may experience crashes.
* Transaction support. The MySQL server supports a
variety of backend \"engines\", only some of which support
transactional access (e.g., InnoDB). This driver will report that the
database supports transactions. Should you decide to make use of the
transactional support in the HDBC API,
/it is up to you to make sure that you use a MySQL engine that supports transactions/.
* Dates and times. MySQL does not store time zone
information in @DATETIME@ or @TIMESTAMP@ columns: instead, it assumes
that all dates are stored in the \"server's time zone\". At some
point in the future, this driver may query for the server's time zone
and apply appropriate time zone conversion to these datatypes. For
now, it simply treats all times as UTC; i.e., it assumes the server's
time zone is UTC.
module Database.HDBC.MySQL
, Connection
, connectMySQL
, defaultMySQLConnectInfo
, withRTSSignalsBlocked
) where
import Database.HDBC.MySQL.Connection
import Database.HDBC.MySQL.RTS
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