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                 $tbl_pag = $dbw->tableName( 'page' );
  52                 $tbl_rev = $dbw->tableName( 'revision' );
  53
  54                 $pageIdClause = '';
  55                 $revPageClause = '';
  56
  57                 # If a list of page_ids was provided, limit results to that set of page_ids
  58                 if ( sizeof( $args ) > 0 ) {
  59                         $pageIdList = implode( ',', $args );
  60                         $pageIdClause = " WHERE page_id IN ({$pageIdList})";
  61                         $revPageClause = " AND rev_page IN ({$pageIdList})";
  62                         $this->output( "Limiting to {$tbl_pag}.page_id IN ({$pageIdList})\n" );
  63                 }
  64
  65                 # Get "active" revisions from the page table
  66                 $this->output( "Searching for active revisions..." );
  67                 $res = $dbw->query( "SELECT page_latest FROM $tbl_pag{$pageIdClause}" );
  68                 $cur = array();
  69                 foreach ( $res as $row ) {
  70                         $cur[] = $row->page_latest;
  71                 }
  72                 $this->output( "done.\n" );
  73
  74                 # Get all revisions that aren't in this set
  75                 $old = array();
  76                 $this->output( "Searching for inactive revisions..." );
  77                 $set = implode( ', ', $cur );
  78                 $res = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_id NOT IN ( $set ){$revPageClause}" );
  79                 foreach ( $res as $row ) {
  80                         $old[] = $row->rev_id;
  81                 }
  82                 $this->output( "done.\n" );
  83
  84                 # Inform the user of what we're going to do
  85                 $count = count( $old );
  86                 $this->output( "$count old revisions found.\n" );
  87
  88                 # Delete as appropriate
  89                 if ( $delete && $count ) {
  90                         $this->output( "Deleting..." );
  91                         $set = implode( ', ', $old );
  92                         $dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
  93                         $this->output( "done.\n" );
  94                 }
  95
  96                 # This bit's done
  97                 # Purge redundant text records
  98                 $dbw->commit( __METHOD__ );
  99                 if ( $delete ) {
 100                         $this->purgeRedundantText( true );
 101                 }
 102         }
 103 }
 104
 105 $maintClass = "DeleteOldRevisions";
 106 require_once( RUN_MAINTENANCE_IF_MAIN );
 107