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->addDescription( '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 = [] ) {
  46                 # Data should come off the master, wrapped in a transaction
  47                 $dbw = $this->getDB( DB_MASTER );
  48                 $this->beginTransaction( $dbw, __METHOD__ );
  49
  50                 $pageConds = [];
  51                 $revConds = [];
  52
  53                 # If a list of page_ids was provided, limit results to that set of page_ids
  54                 if ( count( $args ) > 0 ) {
  55                         $pageConds['page_id'] = $args;
  56                         $revConds['rev_page'] = $args;
  57                         $this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" );
  58                 }
  59
  60                 # Get "active" revisions from the page table
  61                 $this->output( "Searching for active revisions..." );
  62                 $res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ );
  63                 $latestRevs = [];
  64                 foreach ( $res as $row ) {
  65                         $latestRevs[] = $row->page_latest;
  66                 }
  67                 $this->output( "done.\n" );
  68
  69                 # Get all revisions that aren't in this set
  70                 $this->output( "Searching for inactive revisions..." );
  71                 if ( count( $latestRevs ) > 0 ) {
  72                         $revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')';
  73                 }
  74                 $res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ );
  75                 $oldRevs = [];
  76                 foreach ( $res as $row ) {
  77                         $oldRevs[] = $row->rev_id;
  78                 }
  79                 $this->output( "done.\n" );
  80
  81                 # Inform the user of what we're going to do
  82                 $count = count( $oldRevs );
  83                 $this->output( "$count old revisions found.\n" );
  84
  85                 # Delete as appropriate
  86                 if ( $delete && $count ) {
  87                         $this->output( "Deleting..." );
  88                         $dbw->delete( 'revision', [ 'rev_id' => $oldRevs ], __METHOD__ );
  89                         $dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $oldRevs ], __METHOD__ );
  90                         $this->output( "done.\n" );
  91                 }
  92
  93                 # Purge redundant text records
  94                 $this->commitTransaction( $dbw, __METHOD__ );
  95                 if ( $delete ) {
  96                         $this->purgeRedundantText( true );
  97                 }
  98         }
  99 }
 100
 101 $maintClass = DeleteOldRevisions::class;
 102 require_once RUN_MAINTENANCE_IF_MAIN;