maintenance/rebuildrecentchanges.inc

   1 <?php
   2 /**
   3  * Rebuild recent changes table.
   4  *
   5  * @todo document
   6  * @package MediaWiki
   7  * @subpackage Maintenance
   8  */
   9
  10 /** */
  11 function rebuildRecentChangesTablePass1()
  12 {
  13         $fname = 'rebuildRecentChangesTablePass1';
  14         $dbw =& wfGetDB( DB_MASTER );
  15         extract( $dbw->tableNames( 'recentchanges', 'cur', 'old' ) );
  16
  17         $dbw->delete( 'recentchanges', '*' );
  18
  19         print( "Loading from page and revision tables...\n" );
  20
  21         global $wgRCMaxAge;
  22         $cutoff = time() - $wgRCMaxAge;
  23         $dbw->insertSelect( 'recentchanges', array( 'page', 'revision' ),
  24                 array(
  25                         'rc_timestamp'  => 'rev_timestamp',
  26                         'rc_cur_time'   => 'rev_timestamp',
  27                         'rc_user'       => 'rev_user',
  28                         'rc_user_text'  => 'rev_user_text',
  29                         'rc_namespace'  => 'page_namespace',
  30                         'rc_title'      => 'page_title',
  31                         'rc_comment'    => 'rev_comment',
  32                         'rc_minor'      => 'rev_minor_edit',
  33                         'rc_bot'        => 0,
  34                         'rc_new'        => 'page_is_new',
  35                         'rc_cur_id'     => 'page_id',
  36                         'rc_this_oldid' => 'rev_id',
  37                         'rc_last_oldid' => 0, // is this ok?
  38                         'rc_type'       => $dbw->conditional( 'page_is_new != 0', RC_NEW, RC_EDIT ),
  39                 ), array(
  40                         'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $cutoff ) ),
  41                         'rev_page=page_id'
  42                 ), $fname,
  43                 array(), // INSERT options
  44                 array( 'ORDER BY' => 'rev_timestamp', 'LIMIT' => 5000 ) // SELECT options
  45         );
  46 }
  47
  48 function rebuildRecentChangesTablePass2()
  49 {
  50         $dbw =& wfGetDB( DB_MASTER );
  51         list ($recentchanges, $revision) = $dbw->tableNamesN( 'recentchanges', 'revision' );
  52
  53         print( "Updating links...\n" );
  54
  55         # Fill in the rc_last_oldid field, which points to the previous edit
  56         #
  57         $sql = "SELECT rc_cur_id,rc_this_oldid,rc_timestamp FROM $recentchanges " .
  58           "ORDER BY rc_cur_id,rc_timestamp";
  59         $res = $dbw->query( $sql, DB_MASTER );
  60
  61         $lastCurId = 0;
  62         $lastOldId = 0;
  63         while ( $obj = $dbw->fetchObject( $res ) ) {
  64                 $new = 0;
  65                 if( $obj->rc_cur_id != $lastCurId ) {
  66                         # Switch! Look up the previous last edit, if any
  67                         $lastCurId = intval( $obj->rc_cur_id );
  68                         $emit = $obj->rc_timestamp;
  69                         $sql2 = "SELECT rev_id FROM $revision " .
  70                                 "WHERE rev_page={$lastCurId} ".
  71                                 "AND rev_timestamp<'{$emit}' ORDER BY rev_timestamp DESC LIMIT 1";
  72                         $res2 = $dbw->query( $sql2 );
  73                         if( $row = $dbw->fetchObject( $res2 ) ) {
  74                                 $lastOldId = intval( $row->rev_id );
  75                         } else {
  76                                 # No previous edit
  77                                 $lastOldId = 0;
  78                                 $new = 1;
  79                         }
  80                         $dbw->freeResult( $res2 );
  81                 }
  82                 if( $lastCurId == 0 ) {
  83                         print "Uhhh, something wrong? No curid\n";
  84                 } else {
  85                         $sql3 = "UPDATE $recentchanges SET rc_last_oldid=$lastOldId,rc_new=$new,rc_type=$new " .
  86                                 "WHERE rc_cur_id={$lastCurId} AND rc_this_oldid={$obj->rc_this_oldid}";
  87                         $dbw->query( $sql3 );
  88                         $lastOldId = intval( $obj->rc_this_oldid );
  89                 }
  90         }
  91         $dbw->freeResult( $res );
  92 }
  93
  94 ?>