SchemaAlterTableListener.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Core\Database\Schema\EventListener;
 
use Doctrine\DBAL\Event\SchemaAlterTableEventArgs;
use Doctrine\DBAL\Platforms\MySQLPlatform;
use ‪TYPO3\CMS\Core\Database\Schema\TableDiff;
 
class ‪SchemaAlterTableListener
{
    public function ‪onSchemaAlterTable(SchemaAlterTableEventArgs $event)
    {
        $tableDiff = $event->getTableDiff();
 
        // Original Doctrine TableDiff without table options, continue default processing
        if (!$tableDiff instanceof ‪TableDiff) {
            return false;
        }
 
        // Table options are only supported on MySQL, continue default processing
        if (!$event->getPlatform() instanceof MySQLPlatform) {
            return false;
        }
 
        // No changes in table options, continue default processing
        if (count($tableDiff->getTableOptions()) === 0) {
            return false;
        }
 
        $quotedTableName = $tableDiff->getName($event->getPlatform())->getQuotedName($event->getPlatform());
 
        // Add an ALTER TABLE statement to change the table engine to the list of statements.
        if ($tableDiff->hasTableOption('engine')) {
            $statement = 'ALTER TABLE ' . $quotedTableName . ' ENGINE = ' . $tableDiff->getTableOption('engine');
            $event->addSql($statement);
        }
 
        // continue default processing for all other changes.
        return false;
    }
}