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 CUR table...\n" );
  20
  21         $dbw->insertSelect( 'recentchanges', 'cur',
  22                 array(
  23                         'rc_timestamp' => 'cur_timestamp',
  24                         'rc_cur_time' => 'cur_timestamp',
  25                         'rc_user' => 'cur_user',
  26                         'rc_user_text' => 'cur_user_text',
  27                         'rc_namespace' => 'cur_namespace',
  28                         'rc_title' => 'cur_title',
  29                         'rc_comment' => 'cur_comment',
  30                         'rc_minor' => 'cur_minor_edit',
  31                         'rc_bot' => 0,
  32                         'rc_new' => 'cur_is_new',
  33                         'rc_cur_id' => 'cur_id',
  34                         'rc_this_oldid' => 0,
  35                         'rc_last_oldid' => 0,
  36                         'rc_type' => 'IF(cur_is_new,' . RC_NEW . ',' . RC_EDIT . ')'
  37                 ), '*', $fname, array( 'ORDER BY' => 'inverse_timestamp', 'LIMIT' => 5000 )
  38         );
  39
  40         print( "Loading from OLD table...\n" );
  41
  42         $sql = "INSERT INTO $recentchanges (rc_timestamp,rc_cur_time,rc_user," .
  43       "rc_user_text,rc_namespace,rc_title,rc_comment,rc_minor,rc_bot,rc_new," .
  44       "rc_cur_id,rc_this_oldid,rc_last_oldid) SELECT old_timestamp,cur_timestamp," .
  45           "old_user,old_user_text,old_namespace,old_title,old_comment," .
  46           "old_minor_edit,0,0,cur_id,old_id,0 FROM $old,$cur " .
  47           "WHERE old_namespace=cur_namespace AND old_title=cur_title ORDER BY $old.inverse_timestamp " .
  48           "LIMIT 5000";
  49         $dbw->query( $sql );
  50
  51         $sql = "SELECT rc_timestamp FROM $recentchanges " .
  52           "ORDER BY rc_timestamp DESC LIMIT 5000,1";
  53         $res = $dbw->query( $sql );
  54         $obj = $dbw->fetchObject( $res );
  55         $ts = $obj->rc_timestamp;
  56
  57         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$ts}'";
  58         $dbw->query( $sql );
  59 }
  60
  61 function rebuildRecentChangesTablePass2()
  62 {
  63         $dbw =& wfGetDB( DB_MASTER );
  64         extract( $dbw->tableNames( 'recentchanges', 'cur', 'old' ) );
  65
  66         $ns = $id = $count = 0;
  67         $title = $ct =  "";
  68
  69         print( "Updating links...\n" );
  70
  71         # Fill in the rc_last_oldid field, which points to the previous edit
  72         #
  73         $sql = "SELECT rc_cur_id,rc_this_oldid,rc_timestamp FROM $recentchanges " .
  74           "ORDER BY rc_cur_id,rc_timestamp";
  75         $res = $dbw->query( $sql, DB_MASTER );
  76
  77         $lastCurId = 0;
  78         $lastOldId = 0;
  79         while ( $obj = $dbw->fetchObject( $res ) ) {
  80                 $new = 0;
  81                 if( $obj->rc_cur_id != $lastCurId ) {
  82                         # Switch! Look up the previous last edit, if any
  83                         $lastCurId = IntVal( $obj->rc_cur_id );
  84                         $emit = wfInvertTimestamp( $obj->rc_timestamp );
  85                         $sql2 = "SELECT old_id FROM $old,$cur " .
  86                                 "WHERE old_namespace=cur_namespace AND old_title=cur_title AND cur_id={$lastCurId} ".
  87                                 "AND $old.inverse_timestamp>'{$emit}' ORDER BY $old.inverse_timestamp LIMIT 1";
  88                         $res2 = $dbw->query( $sql2 );
  89                         if( $row = $dbw->fetchObject( $res2 ) ) {
  90                                 $lastOldId = IntVal( $row->old_id );
  91                         } else {
  92                                 # No previous edit
  93                                 $lastOldId = 0;
  94                                 $new = 1;
  95                         }
  96                         $dbw->freeResult( $res2 );
  97                 }
  98                 if( $lastCurId == 0 ) {
  99                         print "Uhhh, something wrong? No curid\n";
 100                 } else {
 101                         $sql3 = "UPDATE $recentchanges SET rc_last_oldid=$lastOldId,rc_new=$new,rc_type=$new " .
 102                                 "WHERE rc_cur_id={$lastCurId} AND rc_this_oldid={$obj->rc_this_oldid}";
 103                         $dbw->query( $sql3 );
 104                         $lastOldId = IntVal( $obj->rc_this_oldid );
 105                 }
 106         }
 107         $dbw->freeResult( $res );
 108 }
 109
 110 ?>