OptimizeDatabaseTableTask.php

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<?php
namespace TYPO3\CMS\Scheduler\Task;

/*
 * 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!
 */

class OptimizeDatabaseTableTask extends \TYPO3\CMS\Scheduler\Task\AbstractTask
{
    public $selectedTables = [];

    public function execute()
    {
        foreach ($this->selectedTables as $tableName) {
            $result = $this->getDatabaseConnection()->admin_query('OPTIMIZE TABLE ' . $tableName . ';');
            if ($result === false) {
                throw new \RuntimeException(
                    \TYPO3\CMS\Scheduler\Task\TableGarbageCollectionTask::class . ' failed for: ' . $tableName . ': ' .
                    $this->getDatabaseConnection()->sql_error(),
                    1441390263
                );
            }
        }

        return true;
    }

    public function getAdditionalInformation()
    {
        return implode(', ', $this->selectedTables);
    }

    protected function getDatabaseConnection()
    {
        return $GLOBALS['TYPO3_DB'];
    }
}