vendor/doctrine/dbal/lib/Doctrine/DBAL/Platforms/MySqlPlatform.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\Platforms;

use Doctrine\DBAL\Schema\Identifier;
use Doctrine\DBAL\Schema\TableDiff;
use Doctrine\DBAL\Schema\Index;
use Doctrine\DBAL\Schema\Table;
use Doctrine\DBAL\Types\BlobType;
use Doctrine\DBAL\Types\TextType;

/**
 * The MySqlPlatform provides the behavior, features and SQL dialect of the
 * MySQL database platform. This platform represents a MySQL 5.0 or greater platform that
 * uses the InnoDB storage engine.
 *
 * @since  2.0
 * @author Roman Borschel <roman@code-factory.org>
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 * @todo   Rename: MySQLPlatform
 */
class MySqlPlatform extends AbstractPlatform
{
    const LENGTH_LIMIT_TINYTEXT   = 255;
    const LENGTH_LIMIT_TEXT       = 65535;
    const LENGTH_LIMIT_MEDIUMTEXT = 16777215;

    const LENGTH_LIMIT_TINYBLOB   = 255;
    const LENGTH_LIMIT_BLOB       = 65535;
    const LENGTH_LIMIT_MEDIUMBLOB = 16777215;

    /**
     * Adds MySQL-specific LIMIT clause to the query
     * 18446744073709551615 is 2^64-1 maximum of unsigned BIGINT the biggest limit possible
     */
    protected function doModifyLimitQuery($query, $limit, $offset)
    {
        if ($limit !== null) {
            $query .= ' LIMIT ' . $limit;
            if ($offset !== null) {
                $query .= ' OFFSET ' . $offset;
            }
        } elseif ($offset !== null) {