maintenance/deleteOldRevisions.php

   1 <?php
   2 /**
   3  * Delete old (non-current) revisions from the database
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  * @author Rob Church <robchur@gmail.com>
  23  */
  24
  25 use MediaWiki\Maintenance\Maintenance;
  26
  27 // @codeCoverageIgnoreStart
  28 require_once __DIR__ . '/Maintenance.php';
  29 // @codeCoverageIgnoreEnd
  30
  31 /**
  32  * Maintenance script that deletes old (non-current) revisions from the database.
  33  *
  34  * @ingroup Maintenance
  35  */
  36 class DeleteOldRevisions extends Maintenance {
  37         public function __construct() {
  38                 parent::__construct();
  39                 $this->addDescription( 'Delete old (non-current) revisions from the database' );
  40                 $this->addOption( 'delete', 'Actually perform the deletion' );
  41                 $this->addArg( 'page_id', 'List of page ids to work on', false, true );
  42         }
  43
  44         public function execute() {
  45                 $this->output( "Delete old revisions\n\n" );
  46                 $this->doDelete( $this->hasOption( 'delete' ), $this->getArgs( 'page_id' ) );
  47         }
  48
  49         private function doDelete( $delete = false, $pageIds = [] ) {
  50                 # Data should come off the master, wrapped in a transaction
  51                 $dbw = $this->getPrimaryDB();
  52                 $this->beginTransaction( $dbw, __METHOD__ );
  53
  54                 $pageConds = [];
  55                 $revConds = [];
  56
  57                 # If a list of page_ids was provided, limit results to that set of page_ids
  58                 if ( count( $pageIds ) > 0 ) {
  59                         $pageConds['page_id'] = $pageIds;
  60                         $revConds['rev_page'] = $pageIds;
  61                         $this->output( "Limiting to page IDs " . implode( ',', $pageIds ) . "\n" );
  62                 }
  63
  64                 # Get "active" revisions from the page table
  65                 $this->output( "Searching for active revisions..." );
  66                 $res = $dbw->newSelectQueryBuilder()
  67                         ->select( 'page_latest' )
  68                         ->from( 'page' )
  69                         ->where( $pageConds )
  70                         ->caller( __METHOD__ )
  71                         ->fetchResultSet();
  72                 $latestRevs = [];
  73                 foreach ( $res as $row ) {
  74                         $latestRevs[] = $row->page_latest;
  75                 }
  76                 $this->output( "done.\n" );
  77
  78                 # Get all revisions that aren't in this set
  79                 $this->output( "Searching for inactive revisions..." );
  80                 if ( count( $latestRevs ) > 0 ) {
  81                         $revConds[] = $dbw->expr( 'rev_id', '!=', $latestRevs );
  82                 }
  83                 $res = $dbw->newSelectQueryBuilder()
  84                         ->select( 'rev_id' )
  85                         ->from( 'revision' )
  86                         ->where( $revConds )
  87                         ->caller( __METHOD__ )
  88                         ->fetchResultSet();
  89                 $oldRevs = [];
  90                 foreach ( $res as $row ) {
  91                         $oldRevs[] = $row->rev_id;
  92                 }
  93                 $this->output( "done.\n" );
  94
  95                 # Inform the user of what we're going to do
  96                 $count = count( $oldRevs );
  97                 $this->output( "$count old revisions found.\n" );
  98
  99                 # Delete as appropriate
 100                 if ( $delete && $count ) {
 101                         $this->output( "Deleting..." );
 102                         $dbw->newDeleteQueryBuilder()
 103                                 ->deleteFrom( 'revision' )
 104                                 ->where( [ 'rev_id' => $oldRevs ] )
 105                                 ->caller( __METHOD__ )->execute();
 106                         $dbw->newDeleteQueryBuilder()
 107                                 ->deleteFrom( 'ip_changes' )
 108                                 ->where( [ 'ipc_rev_id' => $oldRevs ] )
 109                                 ->caller( __METHOD__ )->execute();
 110                         $this->output( "done.\n" );
 111                 }
 112
 113                 # Purge redundant text records
 114                 $this->commitTransaction( $dbw, __METHOD__ );
 115                 if ( $delete ) {
 116                         $this->purgeRedundantText( true );
 117                 }
 118         }
 119 }
 120
 121 // @codeCoverageIgnoreStart
 122 $maintClass = DeleteOldRevisions::class;
 123 require_once RUN_MAINTENANCE_IF_MAIN;
 124 // @codeCoverageIgnoreEnd