maintenance/deleteOldRevisions.inc

   1 <?php
   2
   3 /**
   4  * Support functions for the deleteOldRevisions script
   5  *
   6  * @addtogroup Maintenance
   7  * @author Rob Church <robchur@gmail.com>
   8  */
   9
  10 require_once( 'purgeOldText.inc' );
  11
  12 function DeleteOldRevisions( $delete = false ) {
  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         # Get "active" revisions from the page table
  22         echo( "Searching for active revisions..." );
  23         $res = $dbw->query( "SELECT page_latest FROM $tbl_pag" );
  24         while( $row = $dbw->fetchObject( $res ) ) {
  25                 $cur[] = $row->page_latest;
  26         }
  27         echo( "done.\n" );
  28
  29         # Get all revisions that aren't in this set
  30         echo( "Searching for inactive revisions..." );
  31         $set = implode( ', ', $cur );
  32         $res = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_id NOT IN ( $set )" );
  33         while( $row = $dbw->fetchObject( $res ) ) {
  34                 $old[] = $row->rev_id;
  35         }
  36         echo( "done.\n" );
  37
  38         # Inform the user of what we're going to do
  39         $count = count( $old );
  40         echo( "$count old revisions found.\n" );
  41
  42         # Delete as appropriate
  43         if( $delete && $count ) {
  44                 echo( "Deleting..." );
  45                 $set = implode( ', ', $old );
  46                 $dbw->query( "DELETE FROM $tbl_rev WHERE rev_id IN ( $set )" );
  47                 echo( "done.\n" );
  48         }
  49
  50         # This bit's done
  51         # Purge redundant text records
  52         $dbw->commit();
  53         if( $delete ) {
  54                 PurgeRedundantText( true );
  55         }
  56
  57 }
  58
  59 ?>