185 lines
5.0 KiB
PHP
185 lines
5.0 KiB
PHP
<?php
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/**
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* Populates the rev_len and ar_len fields when they are NULL.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Maintenance
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*/
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use MediaWiki\MediaWikiServices;
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use Wikimedia\Rdbms\IDatabase;
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require_once __DIR__ . '/Maintenance.php';
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/**
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* Maintenance script that populates the rev_len and ar_len fields when they are NULL.
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* This is the case for all revisions created before MW 1.10, as well as those affected
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* by T18748 (MW 1.10-1.13) and those affected by T135414 (MW 1.21-1.24).
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*
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* @ingroup Maintenance
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*/
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class PopulateRevisionLength extends LoggedUpdateMaintenance {
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public function __construct() {
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parent::__construct();
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$this->addDescription( 'Populates the rev_len and ar_len fields' );
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$this->setBatchSize( 200 );
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}
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protected function getUpdateKey() {
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return 'populate rev_len and ar_len';
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}
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public function doDBUpdates() {
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$dbw = $this->getDB( DB_PRIMARY );
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if ( !$dbw->tableExists( 'revision', __METHOD__ ) ) {
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$this->fatalError( "revision table does not exist" );
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} elseif ( !$dbw->tableExists( 'archive', __METHOD__ ) ) {
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$this->fatalError( "archive table does not exist" );
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} elseif ( !$dbw->fieldExists( 'revision', 'rev_len', __METHOD__ ) ) {
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$this->output( "rev_len column does not exist\n\n", true );
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return false;
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}
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$revisionStore = MediaWikiServices::getInstance()->getRevisionStore();
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$this->output( "Populating rev_len column\n" );
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$rev = $this->doLenUpdates(
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'revision',
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'rev_id',
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'rev',
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$revisionStore->getQueryInfo()
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);
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$this->output( "Populating ar_len column\n" );
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$ar = $this->doLenUpdates(
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'archive',
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'ar_id',
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'ar',
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$revisionStore->getArchiveQueryInfo()
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);
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$this->output( "rev_len and ar_len population complete "
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. "[$rev revision rows, $ar archive rows].\n" );
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return true;
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}
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/**
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* @param string $table
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* @param string $idCol
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* @param string $prefix
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* @param array $queryInfo
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* @return int
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*/
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protected function doLenUpdates( $table, $idCol, $prefix, $queryInfo ) {
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$dbr = $this->getDB( DB_REPLICA );
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$dbw = $this->getDB( DB_PRIMARY );
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$batchSize = $this->getBatchSize();
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$start = $dbw->selectField( $table, "MIN($idCol)", '', __METHOD__ );
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$end = $dbw->selectField( $table, "MAX($idCol)", '', __METHOD__ );
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if ( !$start || !$end ) {
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$this->output( "...$table table seems to be empty.\n" );
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return 0;
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}
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# Do remaining chunks
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$blockStart = intval( $start );
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$blockEnd = intval( $start ) + $batchSize - 1;
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$count = 0;
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while ( $blockStart <= $end ) {
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$this->output( "...doing $idCol from $blockStart to $blockEnd\n" );
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$res = $dbr->select(
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$queryInfo['tables'],
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$queryInfo['fields'],
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[
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"$idCol >= $blockStart",
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"$idCol <= $blockEnd",
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$dbr->makeList( [
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"{$prefix}_len IS NULL",
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$dbr->makeList( [
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"{$prefix}_len = 0",
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// sha1( "" )
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"{$prefix}_sha1 != " . $dbr->addQuotes( 'phoiac9h4m842xq45sp7s6u21eteeq1' ),
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], IDatabase::LIST_AND )
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], IDatabase::LIST_OR )
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],
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__METHOD__,
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[],
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$queryInfo['joins']
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);
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if ( $res->numRows() > 0 ) {
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$this->beginTransaction( $dbw, __METHOD__ );
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# Go through and update rev_len from these rows.
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foreach ( $res as $row ) {
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if ( $this->upgradeRow( $row, $table, $idCol, $prefix ) ) {
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$count++;
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}
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}
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$this->commitTransaction( $dbw, __METHOD__ );
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}
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$blockStart += $batchSize;
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$blockEnd += $batchSize;
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}
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return $count;
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}
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/**
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* @param stdClass $row
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* @param string $table
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* @param string $idCol
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* @param string $prefix
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* @return bool
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*/
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protected function upgradeRow( $row, $table, $idCol, $prefix ) {
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$dbw = $this->getDB( DB_PRIMARY );
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$revFactory = MediaWikiServices::getInstance()->getRevisionFactory();
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if ( $table === 'archive' ) {
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$revRecord = $revFactory->newRevisionFromArchiveRow( $row );
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} else {
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$revRecord = $revFactory->newRevisionFromRow( $row );
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}
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if ( !$revRecord ) {
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# This should not happen, but sometimes does (T22757)
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$id = $row->$idCol;
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$this->output( "RevisionRecord of $table $id unavailable!\n" );
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return false;
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}
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# Update the row...
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$dbw->update( $table,
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[ "{$prefix}_len" => $revRecord->getSize() ],
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[ $idCol => $row->$idCol ],
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__METHOD__
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);
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return true;
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}
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}
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$maintClass = PopulateRevisionLength::class;
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require_once RUN_MAINTENANCE_IF_MAIN;
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