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 require_once __DIR__ . '/Maintenance.php';
  26
  27 /**
  28  * Maintenance script that deletes old (non-current) revisions from the database.
  29  *
  30  * @ingroup Maintenance
  31  */
  32 class DeleteOldRevisions extends Maintenance {
  33         public function __construct() {
  34                 parent::__construct();
  35                 $this->mDescription = "Delete old (non-current) revisions from the database";
  36                 $this->addOption( 'delete', 'Actually perform the deletion' );
  37                 $this->addOption( 'page_id', 'List of page ids to work on', false );
  38         }
  39
  40         public function execute() {
  41                 $this->output( "Delete old revisions\n\n" );
  42                 $this->doDelete( $this->hasOption( 'delete' ), $this->mArgs );
  43         }
  44
  45         function doDelete( $delete = false, $args = array() ) {
  46
  47                 # Data should come off the master, wrapped in a transaction
  48                 $dbw = wfGetDB( DB_MASTER );
  49                 $dbw->begin( __METHOD__ );
  50
  51                 $pageConds = array();
  52                 $revConds = array();
  53
  54                 # If a list of page_ids was provided, limit results to that set of page_ids
  55                 if ( count( $args ) > 0 ) {
  56                         $pageConds['page_id'] = $args;
  57                         $revConds['rev_page'] = $args;
  58                         $this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" );
  59                 }
  60
  61                 # Get "active" revisions from the page table
  62                 $this->output( "Searching for active revisions..." );
  63                 $res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ );
  64                 $latestRevs = array();
  65                 foreach ( $res as $row ) {
  66                         $latestRevs[] = $row->page_latest;
  67                 }
  68                 $this->output( "done.\n" );
  69
  70                 # Get all revisions that aren't in this set
  71                 $this->output( "Searching for inactive revisions..." );
  72                 if ( count( $latestRevs ) > 0 ) {
  73                         $revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')';
  74                 }
  75                 $res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ );
  76                 $oldRevs = array();
  77                 foreach ( $res as $row ) {
  78                         $oldRevs[] = $row->rev_id;
  79                 }
  80                 $this->output( "done.\n" );
  81
  82                 # Inform the user of what we're going to do
  83                 $count = count( $oldRevs );
  84                 $this->output( "$count old revisions found.\n" );
  85
  86                 # Delete as appropriate
  87                 if ( $delete && $count ) {
  88                         $this->output( "Deleting..." );
  89                         $dbw->delete( 'revision', array( 'rev_id' => $oldRevs ), __METHOD__ );
  90                         $this->output( "done.\n" );
  91                 }
  92
  93                 # This bit's done
  94                 # Purge redundant text records
  95                 $dbw->commit( __METHOD__ );
  96                 if ( $delete ) {
  97                         $this->purgeRedundantText( true );
  98                 }
  99         }
 100 }
 101
 102 $maintClass = "DeleteOldRevisions";
 103 require_once RUN_MAINTENANCE_IF_MAIN;