12870e98c9
These are rows in page_table that have 'page_latest' entry with
corresponding 'rev_id' but no associated 'rev_page' entry in revision
table. Such rows create ghost pages because their 'page_latest' rev is
actually missing or moved to a different page now (which possess the -
associated 'rev_page' on revision table now).
https://en.wikipedia.org/wiki/Module:Jct/city/Chinissai
(page_id=41871839) is an example of such pages. Its page_latest rev is
819371998. But this revision has been moved to another page now
(page_id= 56252475), rendering the former inaccessible.
fb58d39 will prevent this going forward (for scribunto content), but we
need to clear the extant pages for module namespace and others caused
by something else.
Bug: T263340
Change-Id: I51abc295e37030ab181d4380f62c30d7998f1b9e
126 lines
4.1 KiB
PHP
126 lines
4.1 KiB
PHP
<?php
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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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require_once __DIR__ . '/Maintenance.php';
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/**
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* Maintenance script that clears rows of pages corrupted by MergeHistory, those
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* pages 'exist' but have no visible revision.
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*
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* These pages are completely inacessible via the UI due to revision/title mismatch
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* exceptions in RevisionStore and elsewhere.
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*
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* These are rows in page_table that have 'page_latest' entry with corresponding
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* 'rev_id' but no associated 'rev_page' entry in revision table. Such rows create
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* ghost pages because their 'page_latest' is actually living on different pages
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* (which possess the associated 'rev_page' on revision table now).
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*
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* @see https://phabricator.wikimedia.org/T263340
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* @see https://phabricator.wikimedia.org/T259022
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*/
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class FixMergeHistoryCorruption extends Maintenance {
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public function __construct() {
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parent::__construct();
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$this->addDescription( 'Delete pages corrupted by MergeHistory' );
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$this->addOption( 'ns', 'Namespace to restrict the query', true );
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$this->addOption( 'dry-run', 'Run in dry-mode' );
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$this->addOption( 'delete', 'Actually delete the found rows' );
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}
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public function execute() {
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$dbw = $this->getDB( DB_PRIMARY );
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$ns = (int)$this->getOption( 'ns' );
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if ( $this->hasOption( 'dry-run' ) ) {
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$res = $this->query( $dbw, $ns );
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$count = $res->numRows();
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if ( !$count ) {
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$this->output( "Nothing was found, no page matches the criteria.\n" );
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return;
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}
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// Printing them all out since it's believed these pages are not large in number
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$this->output( "Found $count page(s). To actually delete them pass the --delete option.\n" );
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$this->output( "All these pages are in namespace '$ns'. \n" );
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$this->output( str_pad( 'PAGE_NAME', 40 ) . "PAGE_ID\n" );
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foreach ( $res as $row ) {
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$this->output( str_pad( $row->page_title, 40 ) . $row->page_id . "\n" );
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}
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} elseif ( $this->hasOption( 'delete' ) ) {
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$deleted = 0;
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$res = $this->query( $dbw, $ns );
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if ( !$res->numRows() ) {
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$this->output( "Nothing was found, no page matches the criteria.\n" );
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return;
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}
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foreach ( $res as $row ) {
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// Check if there are any revisions that have this $row->page_id as their
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// rev_page and select the largest which should be the newest revision.
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$revId = $dbw->selectField(
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'revision',
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'MAX(rev_id)',
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[ 'rev_page' => $row->page_id ],
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__METHOD__
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);
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if ( !$revId ) {
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$this->output( "Deleting $row->page_title with page_id: $row->page_id\n" );
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$dbw->delete( 'page', [ 'page_id' => $row->page_id ], __METHOD__ );
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$deleted++;
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} else {
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$this->output( "Found the page's revisions: Updating $row->page_title...\n" );
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$dbw->update(
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'page',
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[ 'page_latest' => $revId ],
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[ 'page_id' => $row->page_id ],
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__METHOD__
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);
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}
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}
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$msg = $deleted ? "Deleted $deleted page row(s).\n" : "Nothing was deleted.\n";
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$this->output( $msg );
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} else {
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$this->showHelp();
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}
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}
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private function query( $dbw, $ns ) {
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$query = $dbw->newSelectQueryBuilder()
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->from( 'page' )
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->join( 'revision', null, 'page_latest=rev_id' )
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->fields( [ 'page_namespace', 'page_title', 'page_id' ] )
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->where( [ 'page_id<>rev_page', 'page_namespace' => $ns ] )
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->caller( __METHOD__ );
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return $query->fetchResultSet();
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}
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}
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$maintClass = FixMergeHistoryCorruption::class;
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require_once RUN_MAINTENANCE_IF_MAIN;
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