maintenance/rebuildrecentchanges.inc

   1 <?php
   2
   3 # Rebuild recent changes table.
   4 #
   5
   6 function rebuildRecentChangesTablePass1()
   7 {
   8         $fname = 'rebuildRecentChangesTablePass1';
   9         $dbw =& wfGetDB( DB_MASTER );
  10         extract( $dbw->tableNames( 'recentchanges', 'cur', 'old' ) );
  11
  12         $dbw->delete( 'recentchanges', '*' );
  13
  14         print( "Loading from CUR table...\n" );
  15
  16         $dbw->insertSelect( 'recentchanges', 'cur',
  17                 array(
  18                         'rc_timestamp' => 'cur_timestamp',
  19                         'rc_cur_time' => 'cur_timestamp',
  20                         'rc_user' => 'cur_user',
  21                         'rc_user_text' => 'cur_user_text',
  22                         'rc_namespace' => 'cur_namespace',
  23                         'rc_title' => 'cur_title',
  24                         'rc_comment' => 'cur_comment',
  25                         'rc_minor' => 'cur_minor_edit',
  26                         'rc_bot' => 0,
  27                         'rc_new' => 'cur_is_new',
  28                         'rc_cur_id' => 'cur_id',
  29                         'rc_this_oldid' => 0,
  30                         'rc_last_oldid' => 0,
  31                         'rc_type' => 'IF(cur_is_new,' . RC_NEW . ',' . RC_EDIT . ')'
  32                 ), '*', $fname, array( 'ORDER BY' => 'inverse_timestamp', 'LIMIT' => 5000 )
  33         );
  34
  35         print( "Loading from OLD table...\n" );
  36
  37         $sql = "INSERT INTO $recentchanges (rc_timestamp,rc_cur_time,rc_user," .
  38       "rc_user_text,rc_namespace,rc_title,rc_comment,rc_minor,rc_bot,rc_new," .
  39       "rc_cur_id,rc_this_oldid,rc_last_oldid) SELECT old_timestamp,cur_timestamp," .
  40           "old_user,old_user_text,old_namespace,old_title,old_comment," .
  41           "old_minor_edit,0,0,cur_id,old_id,0 FROM $old,$cur " .
  42           "WHERE old_namespace=cur_namespace AND old_title=cur_title ORDER BY $old.inverse_timestamp " .
  43           "LIMIT 5000";
  44         $dbw->query( $sql );
  45
  46         $sql = "SELECT rc_timestamp FROM $recentchanges " .
  47           "ORDER BY rc_timestamp DESC LIMIT 5000,1";
  48         $res = $dbw->query( $sql );
  49         $obj = $dbw->fetchObject( $res );
  50         $ts = $obj->rc_timestamp;
  51
  52         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$ts}'";
  53         $dbw->query( $sql );
  54 }
  55
  56 function rebuildRecentChangesTablePass2()
  57 {
  58         $dbw =& wfGetDB( DB_MASTER );
  59         extract( $dbw->tableNames( 'recentchanges', 'cur', 'old' ) );
  60
  61         $ns = $id = $count = 0;
  62         $title = $ct =  "";
  63
  64         print( "Updating links...\n" );
  65
  66         # Fill in the rc_last_oldid field, which points to the previous edit
  67         #
  68         $sql = "SELECT rc_cur_id,rc_this_oldid,rc_timestamp FROM $recentchanges " .
  69           "ORDER BY rc_cur_id,rc_timestamp";
  70         $res = $dbw->query( $sql, DB_MASTER );
  71
  72         $lastCurId = 0;
  73         $lastOldId = 0;
  74         while ( $obj = $dbw->fetchObject( $res ) ) {
  75                 $new = 0;
  76                 if( $obj->rc_cur_id != $lastCurId ) {
  77                         # Switch! Look up the previous last edit, if any
  78                         $lastCurId = IntVal( $obj->rc_cur_id );
  79                         $emit = wfInvertTimestamp( $obj->rc_timestamp );
  80                         $sql2 = "SELECT old_id FROM $old,$cur " .
  81                                 "WHERE old_namespace=cur_namespace AND old_title=cur_title AND cur_id={$lastCurId} ".
  82                                 "AND $old.inverse_timestamp>'{$emit}' ORDER BY $old.inverse_timestamp LIMIT 1";
  83                         $res2 = $dbw->query( $sql2 );
  84                         if( $row = $dbw->fetchObject( $res2 ) ) {
  85                                 $lastOldId = IntVal( $row->old_id );
  86                         } else {
  87                                 # No previous edit
  88                                 $lastOldId = 0;
  89                                 $new = 1;
  90                         }
  91                         $dbw->freeResult( $res2 );
  92                 }
  93                 if( $lastCurId == 0 ) {
  94                         print "Uhhh, something wrong? No curid\n";
  95                 } else {
  96                         $sql3 = "UPDATE $recentchanges SET rc_last_oldid=$lastOldId,rc_new=$new,rc_type=$new " .
  97                                 "WHERE rc_cur_id={$lastCurId} AND rc_this_oldid={$obj->rc_this_oldid}";
  98                         $dbw->query( $sql3 );
  99                         $lastOldId = IntVal( $obj->rc_this_oldid );
 100                 }
 101         }
 102         $dbw->freeResult( $res );
 103 }
 104
 105 ?>