812 lines
23 KiB
PHP
812 lines
23 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\DBAL;
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use Doctrine\Common\EventManager,
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Doctrine\DBAL\DBALException;
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/**
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* A wrapper around a Doctrine\DBAL\Driver\Connection that adds features like
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* events, transaction isolation levels, configuration, emulated transaction nesting,
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* lazy connecting and more.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 2.0
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* @version $Revision: 3938 $
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Jonathan Wage <jonwage@gmail.com>
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* @author Roman Borschel <roman@code-factory.org>
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Lukas Smith <smith@pooteeweet.org> (MDB2 library)
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*/
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class Connection
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{
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/**
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* Constant for transaction isolation level READ UNCOMMITTED.
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*/
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const TRANSACTION_READ_UNCOMMITTED = 1;
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/**
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* Constant for transaction isolation level READ COMMITTED.
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*/
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const TRANSACTION_READ_COMMITTED = 2;
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/**
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* Constant for transaction isolation level REPEATABLE READ.
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*/
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const TRANSACTION_REPEATABLE_READ = 3;
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/**
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* Constant for transaction isolation level SERIALIZABLE.
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*/
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const TRANSACTION_SERIALIZABLE = 4;
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/**
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* Derived PDO constants
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*/
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const FETCH_ASSOC = 2;
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const FETCH_BOTH = 4;
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const FETCH_COLUMN = 7;
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const FETCH_NUM = 3;
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const ATTR_AUTOCOMMIT = 0;
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/**
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* The wrapped driver connection.
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*
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* @var Doctrine\DBAL\Driver\Connection
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*/
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protected $_conn;
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/**
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* The Configuration.
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*
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* @var Doctrine\DBAL\Configuration
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*/
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protected $_config;
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/**
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* The EventManager.
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*
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* @var Doctrine\Common\EventManager
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*/
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protected $_eventManager;
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/**
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* Whether or not a connection has been established.
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*
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* @var boolean
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*/
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private $_isConnected = false;
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/**
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* The transaction nesting level.
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*
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* @var integer
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*/
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private $_transactionNestingLevel = 0;
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/**
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* The currently active transaction isolation level.
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*
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* @var integer
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*/
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private $_transactionIsolationLevel;
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/**
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* The parameters used during creation of the Connection instance.
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*
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* @var array
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*/
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private $_params = array();
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/**
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* The DatabasePlatform object that provides information about the
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* database platform used by the connection.
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*
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* @var Doctrine\DBAL\Platforms\AbstractPlatform
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*/
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protected $_platform;
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/**
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* The schema manager.
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*
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* @var Doctrine\DBAL\Schema\SchemaManager
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*/
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protected $_schemaManager;
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/**
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* The used DBAL driver.
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*
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* @var Doctrine\DBAL\Driver
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*/
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protected $_driver;
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/**
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* Flag that indicates whether the current transaction is marked for rollback only.
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*
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* @var boolean
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*/
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private $_isRollbackOnly = false;
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/**
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* Initializes a new instance of the Connection class.
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*
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* @param array $params The connection parameters.
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* @param Driver $driver
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* @param Configuration $config
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* @param EventManager $eventManager
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*/
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public function __construct(array $params, Driver $driver, Configuration $config = null,
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EventManager $eventManager = null)
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{
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$this->_driver = $driver;
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$this->_params = $params;
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if (isset($params['pdo'])) {
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$this->_conn = $params['pdo'];
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$this->_isConnected = true;
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}
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// Create default config and event manager if none given
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if ( ! $config) {
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$config = new Configuration();
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}
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if ( ! $eventManager) {
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$eventManager = new EventManager();
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}
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$this->_config = $config;
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$this->_eventManager = $eventManager;
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if ( ! isset($params['platform'])) {
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$this->_platform = $driver->getDatabasePlatform();
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} else if ($params['platform'] instanceof Platforms\AbstractPlatform) {
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$this->_platform = $params['platform'];
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} else {
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throw DBALException::invalidPlatformSpecified();
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}
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$this->_transactionIsolationLevel = $this->_platform->getDefaultTransactionIsolationLevel();
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}
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/**
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* Gets the parameters used during instantiation.
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*
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* @return array $params
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*/
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public function getParams()
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{
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return $this->_params;
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}
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/**
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* Gets the name of the database this Connection is connected to.
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*
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* @return string $database
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*/
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public function getDatabase()
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{
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return $this->_driver->getDatabase($this);
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}
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/**
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* Gets the hostname of the currently connected database.
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*
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* @return string
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*/
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public function getHost()
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{
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return isset($this->_params['host']) ? $this->_params['host'] : null;
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}
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/**
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* Gets the port of the currently connected database.
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*
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* @return mixed
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*/
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public function getPort()
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{
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return isset($this->_params['port']) ? $this->_params['port'] : null;
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}
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/**
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* Gets the username used by this connection.
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*
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* @return string
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*/
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public function getUsername()
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{
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return isset($this->_params['user']) ? $this->_params['user'] : null;
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}
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/**
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* Gets the password used by this connection.
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*
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* @return string
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*/
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public function getPassword()
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{
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return isset($this->_params['password']) ? $this->_params['password'] : null;
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}
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/**
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* Gets the DBAL driver instance.
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*
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* @return Doctrine\DBAL\Driver
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*/
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public function getDriver()
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{
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return $this->_driver;
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}
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/**
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* Gets the Configuration used by the Connection.
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*
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* @return Doctrine\DBAL\Configuration
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*/
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public function getConfiguration()
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{
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return $this->_config;
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}
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/**
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* Gets the EventManager used by the Connection.
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*
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* @return Doctrine\Common\EventManager
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*/
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public function getEventManager()
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{
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return $this->_eventManager;
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}
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/**
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* Gets the DatabasePlatform for the connection.
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*
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* @return Doctrine\DBAL\Platforms\AbstractPlatform
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*/
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public function getDatabasePlatform()
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{
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return $this->_platform;
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}
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/**
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* Establishes the connection with the database.
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*
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* @return boolean TRUE if the connection was successfully established, FALSE if
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* the connection is already open.
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*/
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public function connect()
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{
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if ($this->_isConnected) return false;
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$driverOptions = isset($this->_params['driverOptions']) ?
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$this->_params['driverOptions'] : array();
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$user = isset($this->_params['user']) ? $this->_params['user'] : null;
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$password = isset($this->_params['password']) ?
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$this->_params['password'] : null;
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$this->_conn = $this->_driver->connect($this->_params, $user, $password, $driverOptions);
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$this->_isConnected = true;
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if ($this->_eventManager->hasListeners(Events::postConnect)) {
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$eventArgs = new \Doctrine\DBAL\Event\ConnectionEventArgs($this);
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$this->_eventManager->dispatchEvent(Events::postConnect, $eventArgs);
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}
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return true;
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}
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/**
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* Prepares and executes an SQL query and returns the first row of the result
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* as an associative array.
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*
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* @param string $statement The SQL query.
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* @param array $params The query parameters.
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* @return array
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* @todo Rename: fetchAssoc
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*/
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public function fetchRow($statement, array $params = array())
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{
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return $this->execute($statement, $params)->fetch(Connection::FETCH_ASSOC);
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}
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/**
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* Prepares and executes an SQL query and returns the first row of the result
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* as a numerically indexed array.
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*
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* @param string $statement sql query to be executed
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* @param array $params prepared statement params
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* @return array
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*/
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public function fetchArray($statement, array $params = array())
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{
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return $this->execute($statement, $params)->fetch(Connection::FETCH_NUM);
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}
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/**
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* Prepares and executes an SQL query and returns the value of a single column
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* of the first row of the result.
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*
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* @param string $statement sql query to be executed
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* @param array $params prepared statement params
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* @param int $colnum 0-indexed column number to retrieve
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* @return mixed
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*/
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public function fetchColumn($statement, array $params = array(), $colnum = 0)
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{
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return $this->execute($statement, $params)->fetchColumn($colnum);
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}
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/**
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* Whether an actual connection to the database is established.
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*
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* @return boolean
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*/
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public function isConnected()
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{
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return $this->_isConnected;
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}
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/**
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* Deletes table row(s) matching the specified identifier.
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*
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* @param string $table The table to delete data from.
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* @param array $identifier An associateve array containing identifier fieldname-value pairs.
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* @return integer The number of affected rows
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*/
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public function delete($tableName, array $identifier)
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{
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$this->connect();
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$criteria = array();
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foreach (array_keys($identifier) as $id) {
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$criteria[] = $id . ' = ?';
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}
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$query = 'DELETE FROM ' . $tableName . ' WHERE ' . implode(' AND ', $criteria);
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return $this->executeUpdate($query, array_values($identifier));
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}
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/**
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* Closes the connection.
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*
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* @return void
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*/
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public function close()
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{
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unset($this->_conn);
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$this->_isConnected = false;
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}
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/**
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* Sets the transaction isolation level.
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*
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* @param integer $level The level to set.
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*/
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public function setTransactionIsolation($level)
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{
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$this->_transactionIsolationLevel = $level;
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return $this->executeUpdate($this->_platform->getSetTransactionIsolationSql($level));
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}
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/**
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* Gets the currently active transaction isolation level.
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*
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* @return integer The current transaction isolation level.
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*/
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public function getTransactionIsolation()
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{
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return $this->_transactionIsolationLevel;
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}
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/**
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* Updates table row(s) with specified data
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*
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* @throws Doctrine\DBAL\ConnectionException if something went wrong at the database level
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* @param string $table The table to insert data into
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* @param array $values An associateve array containing column-value pairs.
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* @return mixed boolean false if empty value array was given,
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* otherwise returns the number of affected rows
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*/
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public function update($tableName, array $data, array $identifier)
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{
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$this->connect();
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if (empty($data)) {
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return false;
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}
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$set = array();
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foreach ($data as $columnName => $value) {
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$set[] = $columnName . ' = ?';
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}
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$params = array_merge(array_values($data), array_values($identifier));
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$sql = 'UPDATE ' . $tableName . ' SET ' . implode(', ', $set)
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. ' WHERE ' . implode(' = ? AND ', array_keys($identifier))
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. ' = ?';
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return $this->executeUpdate($sql, $params);
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}
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/**
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* Inserts a table row with specified data.
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*
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* @param string $table The table to insert data into.
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* @param array $fields An associateve array containing fieldname-value pairs.
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* @return mixed boolean false if empty value array was given,
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* otherwise returns the number of affected rows
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*/
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public function insert($tableName, array $data)
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{
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$this->connect();
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if (empty($data)) {
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return false;
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}
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// column names are specified as array keys
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$cols = array();
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$a = array();
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foreach ($data as $columnName => $value) {
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$cols[] = $columnName;
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$a[] = '?';
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}
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$query = 'INSERT INTO ' . $tableName
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. ' (' . implode(', ', $cols) . ')'
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. ' VALUES (' . implode(', ', $a) . ')';
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return $this->executeUpdate($query, array_values($data));
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}
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/**
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* Set the charset on the current connection
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*
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* @param string charset
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*/
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public function setCharset($charset)
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{
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$this->executeUpdate($this->_platform->getSetCharsetSql($charset));
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}
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/**
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* Quote a string so it can be safely used as a table or column name, even if
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* it is a reserved name.
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*
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* Delimiting style depends on the underlying database platform that is being used.
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*
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* NOTE: Just because you CAN use delimited identifiers doesn't mean
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* you SHOULD use them. In general, they end up causing way more
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* problems than they solve.
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*
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* @param string $str identifier name to be quoted
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* @return string quoted identifier string
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*/
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public function quoteIdentifier($str)
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{
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return $this->_platform->quoteIdentifier($str);
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}
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/**
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* Quotes a given input parameter.
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*
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* @param mixed $input Parameter to be quoted.
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* @param string $type Type of the parameter.
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* @return string The quoted parameter.
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*/
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public function quote($input, $type = null)
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{
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$this->connect();
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return $this->_conn->quote($input, $type);
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}
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/**
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* Prepares and executes an SQL query and returns the result as an associative array.
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*
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* @param string $sql The SQL query.
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* @param array $params The query parameters.
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* @return array
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*/
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public function fetchAll($sql, array $params = array())
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{
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return $this->execute($sql, $params)->fetchAll(Connection::FETCH_ASSOC);
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}
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/**
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* Prepares an SQL statement.
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*
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* @param string $statement The SQL statement to prepare.
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* @return Statement The prepared statement.
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*/
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public function prepare($statement)
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{
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$this->connect();
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return $this->_conn->prepare($statement);
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}
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/**
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* Prepares and executes an SQL query.
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*
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* @param string $query The SQL query to prepare and execute.
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* @param array $params The parameters, if any.
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* @return Statement The prepared and executed statement.
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*/
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public function execute($query, array $params = array())
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{
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$this->connect();
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if ($this->_config->getSqlLogger()) {
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$this->_config->getSqlLogger()->logSql($query, $params);
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}
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if ( ! empty($params)) {
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$stmt = $this->_conn->prepare($query);
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$stmt->execute($params);
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} else {
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$stmt = $this->_conn->query($query);
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}
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return $stmt;
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}
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/**
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* Prepares and executes an SQL query and returns the result, optionally applying a
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* transformation on the rows of the result.
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*
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* @param string $query The SQL query to execute.
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* @param array $params The parameters, if any.
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* @param Closure $mapper The transformation function that is applied on each row.
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* The function receives a single paramater, an array, that
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* represents a row of the result set.
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* @return mixed The (possibly transformed) result of the query.
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*/
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public function query($query, array $params = array(), \Closure $mapper = null)
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{
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$result = array();
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$stmt = $this->execute($query, $params);
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while ($row = $stmt->fetch()) {
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if ($mapper === null) {
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$result[] = $row;
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} else {
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$result[] = $mapper($row);
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}
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}
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$stmt->closeCursor();
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|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Executes an SQL INSERT/UPDATE/DELETE query with the given parameters.
|
|
*
|
|
* @param string $query sql query
|
|
* @param array $params query parameters
|
|
* @return integer
|
|
*/
|
|
public function executeUpdate($query, array $params = array())
|
|
{
|
|
$this->connect();
|
|
|
|
if ($this->_config->getSqlLogger()) {
|
|
$this->_config->getSqlLogger()->logSql($query, $params);
|
|
}
|
|
|
|
if ( ! empty($params)) {
|
|
$stmt = $this->_conn->prepare($query);
|
|
$stmt->execute($params);
|
|
$result = $stmt->rowCount();
|
|
} else {
|
|
$result = $this->_conn->exec($query);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Returns the current transaction nesting level.
|
|
*
|
|
* @return integer The nesting level. A value of 0 means theres no active transaction.
|
|
*/
|
|
public function getTransactionNestingLevel()
|
|
{
|
|
return $this->_transactionNestingLevel;
|
|
}
|
|
|
|
/**
|
|
* Fetch the SQLSTATE associated with the last operation on the database handle
|
|
*
|
|
* @return integer
|
|
*/
|
|
public function errorCode()
|
|
{
|
|
$this->connect();
|
|
|
|
return $this->_conn->errorCode();
|
|
}
|
|
|
|
/**
|
|
* Fetch extended error information associated with the last operation on the database handle
|
|
*
|
|
* @return array
|
|
*/
|
|
public function errorInfo()
|
|
{
|
|
$this->connect();
|
|
|
|
return $this->_conn->errorInfo();
|
|
}
|
|
|
|
/**
|
|
* Returns the ID of the last inserted row, or the last value from a sequence object,
|
|
* depending on the underlying driver.
|
|
*
|
|
* Note: This method may not return a meaningful or consistent result across different drivers,
|
|
* because the underlying database may not even support the notion of auto-increment fields or sequences.
|
|
*
|
|
* @param string $table Name of the table into which a new row was inserted.
|
|
* @param string $field Name of the field into which a new row was inserted.
|
|
*/
|
|
public function lastInsertId($seqName = null)
|
|
{
|
|
$this->connect();
|
|
|
|
return $this->_conn->lastInsertId($seqName);
|
|
}
|
|
|
|
/**
|
|
* Start a transaction by suspending auto-commit mode.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function beginTransaction()
|
|
{
|
|
$this->connect();
|
|
|
|
if ($this->_transactionNestingLevel == 0) {
|
|
$this->_conn->beginTransaction();
|
|
}
|
|
|
|
++$this->_transactionNestingLevel;
|
|
}
|
|
|
|
/**
|
|
* Commits the current transaction.
|
|
*
|
|
* @return void
|
|
* @throws ConnectionException If the commit failed due to no active transaction or
|
|
* because the transaction was marked for rollback only.
|
|
*/
|
|
public function commit()
|
|
{
|
|
if ($this->_transactionNestingLevel == 0) {
|
|
throw ConnectionException::commitFailedNoActiveTransaction();
|
|
}
|
|
if ($this->_isRollbackOnly) {
|
|
throw ConnectionException::commitFailedRollbackOnly();
|
|
}
|
|
|
|
$this->connect();
|
|
|
|
if ($this->_transactionNestingLevel == 1) {
|
|
$this->_conn->commit();
|
|
}
|
|
|
|
--$this->_transactionNestingLevel;
|
|
}
|
|
|
|
/**
|
|
* Cancel any database changes done during a transaction or since a specific
|
|
* savepoint that is in progress. This function may only be called when
|
|
* auto-committing is disabled, otherwise it will fail. Therefore, a new
|
|
* transaction is implicitly started after canceling the pending changes.
|
|
*
|
|
* this method can be listened with onPreTransactionRollback and onTransactionRollback
|
|
* eventlistener methods
|
|
*
|
|
* @throws ConnectionException If the rollback operation failed.
|
|
*/
|
|
public function rollback()
|
|
{
|
|
if ($this->_transactionNestingLevel == 0) {
|
|
throw ConnectionException::rollbackFailedNoActiveTransaction();
|
|
}
|
|
|
|
$this->connect();
|
|
|
|
if ($this->_transactionNestingLevel == 1) {
|
|
$this->_transactionNestingLevel = 0;
|
|
$this->_conn->rollback();
|
|
$this->_isRollbackOnly = false;
|
|
} else {
|
|
$this->_isRollbackOnly = true;
|
|
--$this->_transactionNestingLevel;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the wrapped driver connection.
|
|
*
|
|
* @return Doctrine\DBAL\Driver\Connection
|
|
*/
|
|
public function getWrappedConnection()
|
|
{
|
|
$this->connect();
|
|
|
|
return $this->_conn;
|
|
}
|
|
|
|
/**
|
|
* Gets the SchemaManager that can be used to inspect or change the
|
|
* database schema through the connection.
|
|
*
|
|
* @return Doctrine\DBAL\Schema\SchemaManager
|
|
*/
|
|
public function getSchemaManager()
|
|
{
|
|
if ( ! $this->_schemaManager) {
|
|
$this->_schemaManager = $this->_driver->getSchemaManager($this);
|
|
}
|
|
|
|
return $this->_schemaManager;
|
|
}
|
|
|
|
/**
|
|
* Marks the current transaction so that the only possible
|
|
* outcome for the transaction to be rolled back.
|
|
*
|
|
* @throws BadMethodCallException If no transaction is active.
|
|
*/
|
|
public function setRollbackOnly()
|
|
{
|
|
if ($this->_transactionNestingLevel == 0) {
|
|
throw ConnectionException::noActiveTransaction();
|
|
}
|
|
$this->_isRollbackOnly = true;
|
|
}
|
|
|
|
/**
|
|
* Check whether the current transaction is marked for rollback only.
|
|
*
|
|
* @return boolean
|
|
* @throws BadMethodCallException If no transaction is active.
|
|
*/
|
|
public function getRollbackOnly()
|
|
{
|
|
if ($this->_transactionNestingLevel == 0) {
|
|
throw ConnectionException::noActiveTransaction();
|
|
}
|
|
return $this->_isRollbackOnly;
|
|
}
|
|
}
|