maintenance/deleteOldRevisions.inc

   1 <?php
   2 /**
   3  * Support functions for the deleteOldRevisions script
   4  *
   5  * @file
   6  * @ingroup Maintenance
   7  * @author Rob Church <robchur@gmail.com>
   8  */
   9
  10 require_once( 'purgeOldText.inc' );
  11
  12 function DeleteOldRevisions( $delete = false, $args = array() ) {
  13
  14         # Data should come off the master, wrapped in a transaction
  15         $dbw = wfGetDB( DB_MASTER );
  16         $dbw->begin();
  17
  18         $tbl_pag = $dbw->tableName( 'page' );
  19         $tbl_rev = $dbw->tableName( 'revision' );
  20
  21         $pageIdClause = '';
  22         $revPageClause = '';
  23
  24         # If a list of page_ids was provided, limit results to that set of page_ids
  25         if ( sizeof( $args ) > 0 ) {
  26                 $pageIdList = implode( ',', $args );
  27                 $pageIdClause = " WHERE page_id IN ({$pageIdList})";
  28                 $revPageClause = " AND rev_page IN ({$pageIdList})";
  29                 echo( "Limiting to {$tbl_pag}.page_id IN ({$pageIdList})\n" );
  30         }
  31
  32         # Get "active" revisions from the page table
  33         echo( "Searching for active revisions..." );
  34         $res = $dbw->query( "SELECT page_latest FROM $tbl_pag{$pageIdClause}" );
  35         while( $row = $dbw->fetchObject( $res ) ) {
  36                 $cur[] = $row->page_latest;
  37         }
  38         echo( "done.\n" );
  39
  40         # Get all revisions that aren't in this set
  41         echo( "Searching for inactive revisions..." );
  42         $set = implode( ', ', $cur );
  43         $res = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_id NOT IN ( $set ){$revPageClause}" );
  44         while( $row = $dbw->fetchObject( $res ) ) {
  45                 $old[] = $row->rev_id;
  46         }
  47         echo( "done.\n" );
  48
  49         # Inform the user of what we're going to do
  50         $count = count( $old );
  51         echo( "$count old revisions found.\n" );
  52
  53         # Delete as appropriate
  54         if( $delete && $count ) {
  55                 echo( "Deleting..." );
  56                 $set = implode( ', ', $old );
  57                 $dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
  58                 echo( "done.\n" );
  59         }
  60
  61         # This bit's done
  62         # Purge redundant text records
  63         $dbw->commit();
  64         if( $delete ) {
  65                 PurgeRedundantText( true );
  66         }
  67
  68 }