maintenance/rebuildrecentchanges.inc

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