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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html Gpl v3 or later
* @version $Id$
*
* @category Piwik
* @package Piwik
*/
/**
* @package Piwik
* @subpackage Piwik_Db
*/
class Piwik_Db_Adapter_Pdo_Mysql extends Zend_Db_Adapter_Pdo_Mysql implements Piwik_Db_Adapter_Interface
{
/**
* Returns connection handle
*
* @return resource
*/
public function getConnection()
{
if($this->_connection)
{
return $this->_connection;
}
$this->_connect();
/**
* Before MySQL 5.1.17, server-side prepared statements
* do not use the query cache.
* @see http://dev.mysql.com/doc/refman/5.1/en/query-cache-operation.html
*
* MySQL also does not support preparing certain DDL and SHOW
* statements.
* @see http://framework.zend.com/issues/browse/ZF-1398
*/
$this->_connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
$this->_connection->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true);
return $this->_connection;
}
/**
* Reset the configuration variables in this adapter.
*/
public function resetConfig()
{
$this->_config = array();
}
/**
* Return default port.
*
* @return int
*/
public static function getDefaultPort()
{
return 3306;
}
/**
* Check MySQL version
*/
public function checkServerVersion()
{
$serverVersion = $this->getServerVersion();
$requiredVersion = Zend_Registry::get('config')->General->minimum_mysql_version;
if(version_compare($serverVersion, $requiredVersion) === -1)
{
throw new Exception(Piwik_TranslateException('General_ExceptionDatabaseVersion', array('MySQL', $serverVersion, $requiredVersion)));
}
}
/**
* Check client version compatibility against database server
*/
public function checkClientVersion()
{
$serverVersion = $this->getServerVersion();
$clientVersion = $this->getClientVersion();
if(version_compare($serverVersion, '5') >= 0
&& version_compare($clientVersion, '5') < 0)
{
throw new Exception(Piwik_TranslateException('General_ExceptionIncompatibleClientServerVersions', array('MySQL', $clientVersion, $serverVersion)));
}
}
/**
* Returns true if this adapter's required extensions are enabled
*
* @return bool
*/
public static function isEnabled()
{
$extensions = @get_loaded_extensions();
return in_array('PDO', $extensions) && in_array('pdo_mysql', $extensions) && in_array('mysql', PDO::getAvailableDrivers());
}
/**
* Returns true if this adapter supports blobs as fields
*
* @return bool
*/
public function hasBlobDataType()
{
return true;
}
/**
* Test error number
*
* @param Exception $e
* @param string $errno
* @return bool
*/
public function isErrNo($e, $errno)
{
if(preg_match('/(?:\[|\s)([0-9]{4})(?:\]|\s)/', $e->getMessage(), $match))
{
return $match[1] == $errno;
}
return false;
}
/**
* Is the connection character set equal to utf8?
*
* @return bool
*/
public function isConnectionUTF8()
{
$charsetInfo = $this->fetchAll('SHOW VARIABLES LIKE ?', array('character_set_connection'));
$charset = $charsetInfo[0]['Value'];
return $charset === 'utf8';
}
/**
* Retrieve client version in PHP style
*
* @return string
*/
public function getClientVersion()
{
$this->_connect();
try {
$version = $this->_connection->getAttribute(PDO::ATTR_CLIENT_VERSION);
$matches = null;
if (preg_match('/((?:[0-9]{1,2}\.){1,3}[0-9]{1,2})/', $version, $matches)) {
return $matches[1];
}
} catch (PDOException $e) {
// In case of the driver doesn't support getting attributes
}
return null;
}
}
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