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<?php
/**
* Copyright (c) 2014 Jörn Friedrich Dreyer <jfd@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC\Repair;
use OC\Hooks\BasicEmitter;
class SearchLuceneTables extends BasicEmitter implements \OC\RepairStep {
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() {
if (\OC_DB::tableExists('lucene_status')) {
$this->emit('\OC\Repair', 'info', array('removing duplicate entries from lucene_status'));
$connection = \OC_DB::getConnection();
$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 {
$this->emit('\OC\Repair', 'info', array('lucene_status table does not exist -> nothing to do'));
}
}
}
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