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Path:
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hermes
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bosweb
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web
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b2920
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glo.kkmurray
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documents
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mediawiki
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maintenance
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File: updateCollation.php
<?php /** * Find all rows in the categorylinks table whose collation is out-of-date * (cl_collation != $wgCategoryCollation) and repopulate cl_sortkey * using the page title and cl_sortkey_prefix. * * 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 * @author Aryeh Gregor (Simetrical) */ require_once __DIR__ . '/Maintenance.php'; use MediaWiki\MainConfigNames; use MediaWiki\Title\NamespaceInfo; use MediaWiki\Title\Title; use Wikimedia\Rdbms\IDatabase; use Wikimedia\Rdbms\IMaintainableDatabase; use Wikimedia\Rdbms\IResultWrapper; use Wikimedia\Rdbms\LBFactory; /** * Maintenance script that will find all rows in the categorylinks table * whose collation is out-of-date. * * @ingroup Maintenance */ class UpdateCollation extends Maintenance { /** @var int[] */ public $sizeHistogram = []; /** @var int */ private $numRowsProcessed = 0; /** @var bool */ private $dryRun; /** @var bool */ private $force; /** @var bool */ private $verboseStats; /** @var Collation */ private $collation; /** @var string */ private $collationName; /** @var string|null */ private $targetTable; /** @var IDatabase */ private $dbr; /** @var IMaintainableDatabase */ private $dbw; /** @var LBFactory */ private $lbFactory; /** @var NamespaceInfo */ private $namespaceInfo; public function __construct() { parent::__construct(); $this->addDescription( <<<TEXT This script will find all rows in the categorylinks table whose collation is out-of-date (cl_collation is not the same as \$wgCategoryCollation) and repopulate cl_sortkey using the page title and cl_sortkey_prefix. If all collations are up-to-date, it will do nothing. TEXT ); $this->setBatchSize( 100 ); $this->addOption( 'force', 'Run on all rows, even if the collation is ' . 'supposed to be up-to-date.', false, false, 'f' ); $this->addOption( 'previous-collation', 'Set the previous value of ' . '$wgCategoryCollation here to speed up this script, especially if your ' . 'categorylinks table is large. This will only update rows with that ' . 'collation, though, so it may miss out-of-date rows with a different, ' . 'even older collation.', false, true ); $this->addOption( 'target-collation', 'Set this to the new collation type to ' . 'use instead of $wgCategoryCollation. Usually you should not use this, ' . 'you should just update $wgCategoryCollation in LocalSettings.php.', false, true ); $this->addOption( 'target-table', 'Copy rows from categorylinks into the ' . 'specified table instead of updating them in place.', false, true ); $this->addOption( 'remote', 'Use Shellbox to calculate the new sort keys ' . 'remotely.' ); $this->addOption( 'dry-run', 'Don\'t actually change the collations, just ' . 'compile statistics.' ); $this->addOption( 'verbose-stats', 'Show more statistics.' ); } /** * Get services and initialise member variables */ private function init() { $services = $this->getServiceContainer(); $this->namespaceInfo = $services->getNamespaceInfo(); $this->lbFactory = $services->getDBLoadBalancerFactory(); if ( $this->hasOption( 'target-collation' ) ) { $this->collationName = $this->getOption( 'target-collation' ); } else { $this->collationName = $this->getConfig()->get( MainConfigNames::CategoryCollation ); } if ( $this->hasOption( 'remote' ) ) { $realCollationName = 'remote-' . $this->collationName; } else { $realCollationName = $this->collationName; } $this->collation = $services->getCollationFactory()->makeCollation( $realCollationName ); // Collation check: in some cases the constructor will work, // but this will raise an exception, breaking all category pages $this->collation->getSortKey( 'MediaWiki' ); $this->force = $this->getOption( 'force' ); $this->dryRun = $this->getOption( 'dry-run' ); $this->verboseStats = $this->getOption( 'verbose-stats' ); $this->dbw = $this->getDB( DB_PRIMARY ); $this->dbr = $this->getDB( DB_REPLICA ); $this->targetTable = $this->getOption( 'target-table' ); } public function execute() { $this->init(); $batchSize = $this->getBatchSize(); if ( $this->targetTable ) { if ( !$this->dbw->tableExists( $this->targetTable, __METHOD__ ) ) { $this->output( "Creating table {$this->targetTable}\n" ); $this->dbw->query( 'CREATE TABLE ' . $this->dbw->tableName( $this->targetTable ) . ' LIKE ' . $this->dbw->tableName( 'categorylinks' ), __METHOD__ ); } } // Locally at least, (my local is a rather old version of mysql) // mysql seems to filesort if there is both an equality // (but not for an inequality) condition on cl_collation in the // WHERE and it is also the first item in the ORDER BY. if ( $this->hasOption( 'previous-collation' ) ) { $orderBy = 'cl_to, cl_type, cl_from'; } else { $orderBy = 'cl_collation, cl_to, cl_type, cl_from'; } $collationConds = []; if ( !$this->force && !$this->targetTable ) { if ( $this->hasOption( 'previous-collation' ) ) { $collationConds['cl_collation'] = $this->getOption( 'previous-collation' ); } else { $collationConds = [ 0 => 'cl_collation != ' . $this->dbr->addQuotes( $this->collationName ) ]; } $count = $this->dbr->estimateRowCount( 'categorylinks', '*', $collationConds, __METHOD__ ); // Improve estimate if feasible if ( $count < 1000000 ) { $count = $this->dbr->newSelectQueryBuilder() ->select( 'COUNT(*)' ) ->from( 'categorylinks' ) ->where( $collationConds ) ->caller( __METHOD__ )->fetchField(); } if ( $count == 0 ) { $this->output( "Collations up-to-date.\n" ); return; } if ( $this->dryRun ) { $this->output( "$count rows would be updated.\n" ); } else { $this->output( "Fixing collation for $count rows.\n" ); } } $batchConds = []; do { $this->output( "Selecting next $batchSize rows..." ); // cl_type must be selected as a number for proper paging because // enums suck. if ( $this->dbw->getType() === 'mysql' ) { $clType = 'cl_type+0 AS "cl_type_numeric"'; } else { $clType = 'cl_type'; } $res = $this->dbw->newSelectQueryBuilder() ->select( [ 'cl_from', 'cl_to', 'cl_sortkey_prefix', 'cl_collation', 'cl_sortkey', $clType, 'cl_timestamp', 'page_namespace', 'page_title' ] ) ->from( 'categorylinks' ) // per T58041 ->straightJoin( 'page', null, 'cl_from = page_id' ) ->where( $collationConds ) ->andWhere( $batchConds ) ->limit( $batchSize ) ->orderBy( $orderBy ) ->caller( __METHOD__ )->fetchResultSet(); $this->output( " processing..." ); if ( $res->numRows() ) { if ( $this->targetTable ) { $this->copyBatch( $res ); } else { $this->updateBatch( $res ); } $res->seek( $res->numRows() - 1 ); $lastRow = $res->fetchObject(); $batchConds = [ $this->getBatchCondition( $lastRow, $this->dbw ) ]; } if ( $this->dryRun ) { $this->output( "{$this->numRowsProcessed} rows would be updated so far.\n" ); } else { $this->output( "{$this->numRowsProcessed} done.\n" ); } } while ( $res->numRows() == $batchSize ); if ( !$this->dryRun ) { $this->output( "{$this->numRowsProcessed} rows processed\n" ); } if ( $this->verboseStats ) { $this->output( "\n" ); $this->showSortKeySizeHistogram(); } } /** * Return an SQL expression selecting rows which sort above the given row, * assuming an ordering of cl_collation, cl_to, cl_type, cl_from * @param stdClass $row * @param IDatabase $dbw * @return string */ private function getBatchCondition( $row, $dbw ) { if ( $this->hasOption( 'previous-collation' ) ) { $fields = [ 'cl_to', 'cl_type', 'cl_from' ]; } else { $fields = [ 'cl_collation', 'cl_to', 'cl_type', 'cl_from' ]; } $conds = []; foreach ( $fields as $field ) { if ( $dbw->getType() === 'mysql' && $field === 'cl_type' ) { // Range conditions with enums are weird in mysql // This must be a numeric literal, or it won't work. $value = intval( $row->cl_type_numeric ); } else { $value = $row->$field; } $conds[ $field ] = $value; } return $dbw->buildComparison( '>', $conds ); } /** * Update a set of rows in the categorylinks table * * @param IResultWrapper $res The rows to update */ private function updateBatch( $res ) { if ( !$this->dryRun ) { $this->beginTransaction( $this->dbw, __METHOD__ ); } foreach ( $res as $row ) { $title = Title::newFromRow( $row ); if ( !$row->cl_collation ) { # This is an old-style row, so the sortkey needs to be # converted. if ( $row->cl_sortkey == $title->getText() || $row->cl_sortkey == $title->getPrefixedText() ) { $prefix = ''; } else { # Custom sortkey, use it as a prefix $prefix = $row->cl_sortkey; } } else { $prefix = $row->cl_sortkey_prefix; } # cl_type will be wrong for lots of pages if cl_collation is 0, # so let's update it while we're here. $type = $this->namespaceInfo->getCategoryLinkType( $row->page_namespace ); $newSortKey = $this->collation->getSortKey( $title->getCategorySortkey( $prefix ) ); $this->updateSortKeySizeHistogram( $newSortKey ); // Truncate to 230 bytes to avoid DB error $newSortKey = substr( $newSortKey, 0, 230 ); if ( $this->dryRun ) { // Add 1 to the count if the sortkey was changed. (Note that this doesn't count changes in // other fields, if any, those usually only happen when upgrading old MediaWikis.) $this->numRowsProcessed += ( $row->cl_sortkey !== $newSortKey ); } else { $this->dbw->update( 'categorylinks', [ 'cl_sortkey' => $newSortKey, 'cl_sortkey_prefix' => $prefix, 'cl_collation' => $this->collationName, 'cl_type' => $type, 'cl_timestamp = cl_timestamp', ], [ 'cl_from' => $row->cl_from, 'cl_to' => $row->cl_to ], __METHOD__ ); $this->numRowsProcessed++; } } if ( !$this->dryRun ) { $this->commitTransaction( $this->dbw, __METHOD__ ); } } /** * Copy a set of rows to the target table * * @param IResultWrapper $res */ private function copyBatch( $res ) { $sortKeyInputs = []; foreach ( $res as $row ) { $title = Title::newFromRow( $row ); $sortKeyInputs[] = $title->getCategorySortkey( $row->cl_sortkey_prefix ); } $sortKeys = $this->collation->getSortKeys( $sortKeyInputs ); $rowsToInsert = []; foreach ( $res as $i => $row ) { if ( !isset( $sortKeys[$i] ) ) { throw new RuntimeException( 'Unable to get sort key' ); } $newSortKey = $sortKeys[$i]; $this->updateSortKeySizeHistogram( $newSortKey ); // Truncate to 230 bytes to avoid DB error $newSortKey = substr( $newSortKey, 0, 230 ); $type = $this->namespaceInfo->getCategoryLinkType( $row->page_namespace ); $rowsToInsert[] = [ 'cl_from' => $row->cl_from, 'cl_to' => $row->cl_to, 'cl_sortkey' => $newSortKey, 'cl_sortkey_prefix' => $row->cl_sortkey_prefix, 'cl_collation' => $this->collationName, 'cl_type' => $type, 'cl_timestamp' => $row->cl_timestamp ]; } if ( $this->dryRun ) { $this->numRowsProcessed += count( $rowsToInsert ); } else { $this->beginTransaction( $this->dbw, __METHOD__ ); $this->dbw->insert( $this->targetTable, $rowsToInsert, __METHOD__, [ 'IGNORE' ] ); $this->numRowsProcessed += $this->dbw->affectedRows(); $this->commitTransaction( $this->dbw, __METHOD__ ); } } /** * Update the verbose statistics * * @param string $key */ private function updateSortKeySizeHistogram( $key ) { if ( !$this->verboseStats ) { return; } $length = strlen( $key ); if ( !isset( $this->sizeHistogram[$length] ) ) { $this->sizeHistogram[$length] = 0; } $this->sizeHistogram[$length]++; } /** * Show the verbose statistics */ private function showSortKeySizeHistogram() { if ( !$this->sizeHistogram ) { return; } $maxLength = max( array_keys( $this->sizeHistogram ) ); if ( $maxLength == 0 ) { return; } $numBins = 20; $coarseHistogram = array_fill( 0, $numBins, 0 ); $coarseBoundaries = []; $boundary = 0; for ( $i = 0; $i < $numBins - 1; $i++ ) { $boundary += $maxLength / $numBins; $coarseBoundaries[$i] = round( $boundary ); } $coarseBoundaries[$numBins - 1] = $maxLength + 1; $raw = ''; for ( $i = 0; $i <= $maxLength; $i++ ) { if ( $raw !== '' ) { $raw .= ', '; } $val = $this->sizeHistogram[$i] ?? 0; for ( $coarseIndex = 0; $coarseIndex < $numBins - 1; $coarseIndex++ ) { // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset False positive if ( $coarseBoundaries[$coarseIndex] > $i ) { $coarseHistogram[$coarseIndex] += $val; break; } } if ( $coarseIndex == $numBins - 1 ) { $coarseHistogram[$coarseIndex] += $val; } $raw .= $val; } $this->output( "Sort key size histogram\nRaw data: $raw\n\n" ); $maxBinVal = max( $coarseHistogram ); $scale = 60 / $maxBinVal; $prevBoundary = 0; for ( $coarseIndex = 0; $coarseIndex < $numBins; $coarseIndex++ ) { $val = $coarseHistogram[$coarseIndex] ?? 0; // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset False positive $boundary = $coarseBoundaries[$coarseIndex]; $this->output( sprintf( "%-10s %-10d |%s\n", $prevBoundary . '-' . ( $boundary - 1 ) . ': ', $val, str_repeat( '*', $scale * $val ) ) ); $prevBoundary = $boundary; } } } $maintClass = UpdateCollation::class; require_once RUN_MAINTENANCE_IF_MAIN;
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