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<?php
/**
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @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\Migration\IOutput;
use OCP\Migration\IRepairStep;
class SearchLuceneTables implements IRepairStep {
public function getName() {
return 'Repair duplicate entries in oc_lucene_status';
}
/**
* Fix duplicate entries in oc_lucene_status
*
* search_lucene prior to v0.5.0 did not have a primary key on the lucene_status table. Newer versions do, which
* causes the migration check to fail because it tries to insert duplicate rows into the new schema.
*
* FIXME Currently, apps don't have a way of repairing anything before the migration check:
* @link https://github.com/owncloud/core/issues/10980
*
* As a result this repair step needs to live in the core repo, although it belongs into search_lucene:
* @link https://github.com/owncloud/core/issues/10205#issuecomment-54957557
*
* It will completely remove any rows that make a file id have more than one status:
* fileid | status fileid | status
* --------+-------- will become --------+--------
* 2 | E 3 | E
* 2 | I
* 3 | E
*
* search_lucene will then reindex the fileids without a status when the next indexing job is executed
*/
public function run(IOutput $out) {
$connection = \OC::$server->getDatabaseConnection();
if ($connection->tableExists('lucene_status')) {
$out->info('removing duplicate entries from lucene_status');
$query = $connection->prepare('
DELETE FROM `*PREFIX*lucene_status`
WHERE `fileid` IN (
SELECT `fileid`
FROM (
SELECT `fileid`
FROM `*PREFIX*lucene_status`
GROUP BY `fileid`
HAVING count(`fileid`) > 1
) AS `mysqlerr1093hack`
)');
$query->execute();
} else {
$out->info('lucene_status table does not exist -> nothing to do');
}
}
}
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