maintenance/rebuildtextindex.inc

   1 <?php
   2
   3 # Rebuild the fulltext search indexes. This may take a while
   4 # depending on the database size and server configuration.
   5
   6 # Rebuilding is faster if you drop the index and recreate it,
   7 # but that will prevent searches from working while it runs.
   8
   9 define( "RTI_CHUNK_SIZE", 500 );
  10
  11 function dropTextIndex( &$database )
  12 {
  13         $searchindex = $database->tableName( 'searchindex' );
  14         if ( $database->indexExists( "searchindex", "si_title" ) ) {
  15                 echo "Dropping index...\n";
  16                 $sql = "ALTER TABLE $searchindex DROP INDEX si_title, DROP INDEX si_text";
  17                 $database->query($sql, "dropTextIndex" );
  18         }
  19 }
  20
  21 function createTextIndex( &$database )
  22 {
  23         $searchindex = $database->tableName( 'searchindex' );
  24         echo "Rebuild the index...\n";
  25         $sql = "ALTER TABLE $searchindex ADD FULLTEXT si_title (si_title), " .
  26           "ADD FULLTEXT si_text (si_text)";
  27         $database->query($sql, "createTextIndex" );
  28 }
  29
  30 function rebuildTextIndex( &$database )
  31 {
  32         extract( $database->tableNames( 'cur', 'searchindex' ) );
  33
  34         $sql = "SELECT MAX(cur_id) AS count FROM $cur";
  35         $res = $database->query($sql, "rebuildTextIndex" );
  36         $s = $database->fetchObject($res);
  37         $count = $s->count;
  38         echo "Rebuilding index fields for {$count} pages...\n";
  39         $n = 0;
  40
  41         while ( $n < $count ) {
  42                 print "$n\n";
  43                 $end = $n + RTI_CHUNK_SIZE - 1;
  44                 $sql = "SELECT cur_id, cur_namespace, cur_title, cur_text FROM $cur WHERE cur_id BETWEEN $n AND $end";
  45                 $res = $database->query($sql, "rebuildTextIndex" );
  46
  47                 while( $s = $database->fetchObject($res) ) {
  48                         $u = new SearchUpdate( $s->cur_id, $s->cur_title, $s->cur_text );
  49                         $u->doUpdate();
  50                 }
  51                 $database->freeResult( $res );
  52                 $n += RTI_CHUNK_SIZE;
  53         }
  54 }
  55
  56 ?>