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Diffstat (limited to 'www/wiki/maintenance/populateRevisionLength.php')
| -rw-r--r-- | www/wiki/maintenance/populateRevisionLength.php | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/www/wiki/maintenance/populateRevisionLength.php b/www/wiki/maintenance/populateRevisionLength.php new file mode 100644 index 00000000..dcb89d19 --- /dev/null +++ b/www/wiki/maintenance/populateRevisionLength.php @@ -0,0 +1,168 @@ +<?php +/** + * Populates the rev_len and ar_len fields when they are NULL. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * http://www.gnu.org/copyleft/gpl.html + * + * @file + * @ingroup Maintenance + */ + +use Wikimedia\Rdbms\IDatabase; + +require_once __DIR__ . '/Maintenance.php'; + +/** + * Maintenance script that populates the rev_len and ar_len fields when they are NULL. + * This is the case for all revisions created before MW 1.10, as well as those affected + * by T18748 (MW 1.10-1.13) and those affected by T135414 (MW 1.21-1.24). + * + * @ingroup Maintenance + */ +class PopulateRevisionLength extends LoggedUpdateMaintenance { + public function __construct() { + parent::__construct(); + $this->addDescription( 'Populates the rev_len and ar_len fields' ); + $this->setBatchSize( 200 ); + } + + protected function getUpdateKey() { + return 'populate rev_len and ar_len'; + } + + public function doDBUpdates() { + $dbw = $this->getDB( DB_MASTER ); + if ( !$dbw->tableExists( 'revision' ) ) { + $this->fatalError( "revision table does not exist" ); + } elseif ( !$dbw->tableExists( 'archive' ) ) { + $this->fatalError( "archive table does not exist" ); + } elseif ( !$dbw->fieldExists( 'revision', 'rev_len', __METHOD__ ) ) { + $this->output( "rev_len column does not exist\n\n", true ); + + return false; + } + + $this->output( "Populating rev_len column\n" ); + $rev = $this->doLenUpdates( 'revision', 'rev_id', 'rev', Revision::getQueryInfo() ); + + $this->output( "Populating ar_len column\n" ); + $ar = $this->doLenUpdates( 'archive', 'ar_id', 'ar', Revision::getArchiveQueryInfo() ); + + $this->output( "rev_len and ar_len population complete " + . "[$rev revision rows, $ar archive rows].\n" ); + + return true; + } + + /** + * @param string $table + * @param string $idCol + * @param string $prefix + * @param array $queryInfo + * @return int + */ + protected function doLenUpdates( $table, $idCol, $prefix, $queryInfo ) { + $dbr = $this->getDB( DB_REPLICA ); + $dbw = $this->getDB( DB_MASTER ); + $batchSize = $this->getBatchSize(); + $start = $dbw->selectField( $table, "MIN($idCol)", '', __METHOD__ ); + $end = $dbw->selectField( $table, "MAX($idCol)", '', __METHOD__ ); + if ( !$start || !$end ) { + $this->output( "...$table table seems to be empty.\n" ); + + return 0; + } + + # Do remaining chunks + $blockStart = intval( $start ); + $blockEnd = intval( $start ) + $batchSize - 1; + $count = 0; + + while ( $blockStart <= $end ) { + $this->output( "...doing $idCol from $blockStart to $blockEnd\n" ); + $res = $dbr->select( + $queryInfo['tables'], + $queryInfo['fields'], + [ + "$idCol >= $blockStart", + "$idCol <= $blockEnd", + $dbr->makeList( [ + "{$prefix}_len IS NULL", + $dbr->makeList( [ + "{$prefix}_len = 0", + "{$prefix}_sha1 != " . $dbr->addQuotes( 'phoiac9h4m842xq45sp7s6u21eteeq1' ), // sha1( "" ) + ], IDatabase::LIST_AND ) + ], IDatabase::LIST_OR ) + ], + __METHOD__, + [], + $queryInfo['joins'] + ); + + if ( $res->numRows() > 0 ) { + $this->beginTransaction( $dbw, __METHOD__ ); + # Go through and update rev_len from these rows. + foreach ( $res as $row ) { + if ( $this->upgradeRow( $row, $table, $idCol, $prefix ) ) { + $count++; + } + } + $this->commitTransaction( $dbw, __METHOD__ ); + } + + $blockStart += $batchSize; + $blockEnd += $batchSize; + } + + return $count; + } + + /** + * @param stdClass $row + * @param string $table + * @param string $idCol + * @param string $prefix + * @return bool + */ + protected function upgradeRow( $row, $table, $idCol, $prefix ) { + $dbw = $this->getDB( DB_MASTER ); + + $rev = ( $table === 'archive' ) + ? Revision::newFromArchiveRow( $row ) + : new Revision( $row ); + + $content = $rev->getContent( Revision::RAW ); + if ( !$content ) { + # This should not happen, but sometimes does (T22757) + $id = $row->$idCol; + $this->output( "Content of $table $id unavailable!\n" ); + + return false; + } + + # Update the row... + $dbw->update( $table, + [ "{$prefix}_len" => $content->getSize() ], + [ $idCol => $row->$idCol ], + __METHOD__ + ); + + return true; + } +} + +$maintClass = PopulateRevisionLength::class; +require_once RUN_MAINTENANCE_IF_MAIN; |