Gecko [ paroquia-rio-de-mouro.pt ]

Name	Size	Permission	Date
Apps.php	10.45 KB	-rw-r--r--	2018-04-19 18:15
CleanTags.php	5.4 KB	-rw-r--r--	2018-04-19 18:15
Collation.php	3.65 KB	-rw-r--r--	2018-04-19 18:15
DisableExtraThemes.php	2.67 KB	-rw-r--r--	2018-04-19 18:15
DropOldJobs.php	2.29 KB	-rw-r--r--	2018-04-19 18:15
DropOldTables.php	2.48 KB	-rw-r--r--	2018-04-19 18:15
FillETags.php	1.59 KB	-rw-r--r--	2018-04-19 18:15
InnoDB.php	2.05 KB	-rw-r--r--	2018-04-19 18:15
MoveAvatarOutsideHome.php	3.71 KB	-rw-r--r--	2018-04-19 18:15
OldGroupMembershipShares.php	3.27 KB	-rw-r--r--	2018-04-19 18:15
Preview.php	1.33 KB	-rw-r--r--	2018-04-19 18:15
RemoveGetETagEntries.php	1.6 KB	-rw-r--r--	2018-04-19 18:15
RemoveRootShares.php	3.45 KB	-rw-r--r--	2018-04-19 18:15
RepairInvalidShares.php	5.81 KB	-rw-r--r--	2018-04-19 18:15
RepairMimeTypes.php	9.32 KB	-rw-r--r--	2018-04-19 18:15
RepairMismatchFileCachePath.php	19.13 KB	-rw-r--r--	2018-04-19 18:15
RepairOrphanedSubshare.php	2.64 KB	-rw-r--r--	2018-04-19 18:15
RepairSubShares.php	2.8 KB	-rw-r--r--	2018-04-19 18:15
RepairUnmergedShares.php	11.26 KB	-rw-r--r--	2018-04-19 18:15
SearchLuceneTables.php	2.64 KB	-rw-r--r--	2018-04-19 18:15
SharePropagation.php	1.42 KB	-rw-r--r--	2018-04-19 18:15
SqliteAutoincrement.php	2.86 KB	-rw-r--r--	2018-04-19 18:15
UpdateCertificateStore.php	2.6 KB	-rw-r--r--	2018-04-19 18:15
UpdateOutdatedOcsIds.php	2.47 KB	-rw-r--r--	2018-04-19 18:15

Rename

<?php
/**
 * @author Sujith Haridasan <sharidasan@owncloud.com>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC\Repair;

use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;

class RepairOrphanedSubshare implements IRepairStep {

/** @var IDBConnection  */
	private $connection;

/** @var  IQueryBuilder */
	private $missingParents;

/** @var IQueryBuilder  */
	private $deleteOrphanReshares;

/** @var  int */
	private $pageLimit;

/**
	 * RepairOrphanedSubshare constructor.
	 *
	 * @param IDBConnection $connection
	 */
	public function __construct(IDBConnection $connection, $pageLimit = 1000) {
		$this->connection = $connection;
	}

/**
	 * Returns the step's name
	 *
	 * @return string
	 */
	public function getName() {
		return 'Repair orphaned reshare';
	}

/**
	 * Run repair step.
	 * Must throw exception on error.
	 *
	 * @param IOutput $output
	 * @throws \Exception in case of failure
	 */
	public function run(IOutput $output) {
		/**
		 * DELETE FROM share
		 * WHERE parent NOT IN (
		 * 		SELECT id FROM (
		 * 			SELECT id FROM share
		 * 			ORDER BY id -- to prevent derived table merge
		 * 		) mysqlerr1093hack
		 * )
		 */

// subselect for all share ids
		$allShares = $this->connection->getQueryBuilder()
			->select('id')
			->from('share')
			->orderBy('id'); // to prevent derived table merge, see https://mariadb.com/kb/en/library/derived-table-merge-optimization/#factsheet

// TODO this subquery currently cannot be built with our doctrine wrapper
		// TODO make the mysql hack optional? might also be needed for oracle
		$subquery = "SELECT `id` FROM ({$allShares->getSQL()}) mysqlerr1093hack";

//This delete query deletes orphan shares whose parents are missing
		$deleteOrphanReshares = $this->connection->getQueryBuilder();
		$deleteOrphanReshares
			->delete('share')
			->where($deleteOrphanReshares->expr()->notIn('parent',
			$deleteOrphanReshares->createFunction($subquery)));
		$deleteOrphanReshares->execute();
	}
}