vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php

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<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL\Driver\OCI8;

use Doctrine\DBAL\Driver\Connection;
use Doctrine\DBAL\Driver\ServerInfoAwareConnection;
use Doctrine\DBAL\Platforms\OraclePlatform;

/**
 * OCI8 implementation of the Connection interface.
 *
 * @since 2.0
 */
class OCI8Connection implements Connection, ServerInfoAwareConnection
{
    /**
     * @var resource
     */
    protected $dbh;

    /**
     * @var integer
     */
    protected $executeMode = OCI_COMMIT_ON_SUCCESS;

    /**
     * Creates a Connection to an Oracle Database using oci8 extension.
     *
     * @param string      $username
     * @param string      $password
     * @param string      $db
     * @param string|null $charset
     * @param integer     $sessionMode
     * @param boolean     $persistent
     *
     * @throws OCI8Exception
     */
    public function __construct($username, $password, $db, $charset = null, $sessionMode = OCI_DEFAULT, $persistent = false)
    {
        if (!defined('OCI_NO_AUTO_COMMIT')) {
            define('OCI_NO_AUTO_COMMIT', 0);
        }