MediaWiki 1.16.4-scripts

[autoinstalls/mediawiki.git] / maintenance / rebuildtextindex.php

diff --git a/maintenance/rebuildtextindex.php b/maintenance/rebuildtextindex.php
index 47d297a9bb28d8857b2e25f4fa3d16ca4d82cabe..4521c6f51c85e0c3fb91d636f63a6155daabb983 100644 (file)
--- a/maintenance/rebuildtextindex.php
+++ b/maintenance/rebuildtextindex.php
@@ -1,32 +1,129 @@
 <?php
 /**
- * Rebuild search index table from scratch.  This takes several
+ * Rebuild search index table from scratch.  This may take several
  * hours, depending on the database size and server configuration.
  *
- * This is only for MySQL (see bug 9905). For postgres we can probably
- * use SearchPostgres::update($pageid);
+ * Postgres is trigger-based and should never need rebuilding.
  *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @ingroup Maintenance
  * @todo document
- * @addtogroup Maintenance
  */
 
-/** */
-require_once( "commandLine.inc" );
-require_once( "rebuildtextindex.inc" );
+require_once( dirname(__FILE__) . '/Maintenance.php' );
 
-$database = wfGetDB( DB_MASTER );
-if( !$database instanceof DatabaseMysql ) {
-       print "This script is only for MySQL.\n";
-       exit();
-}
+class RebuildTextIndex extends Maintenance {
+       const RTI_CHUNK_SIZE = 500;
+       private $db;
+
+       public function __construct() {
+               parent::__construct();
+               $this->mDescription = "Rebuild search index table from scratch";
+       }
 
-$wgTitle = Title::newFromText( "Rebuild text index script" );
+       public function getDbType() {
+               return Maintenance::DB_ADMIN;
+       }
 
-dropTextIndex( $database );
-rebuildTextIndex( $database );
-createTextIndex( $database );
+       public function execute() {
+               global $wgTitle, $wgDBtype;
 
-print "Done.\n";
-exit();
+               // Shouldn't be needed for Postgres
+               if ( $wgDBtype == 'postgres' ) {
+                       $this->error( "This script is not needed when using Postgres.\n", true );
+               }
+       
+               $this->db = wfGetDB( DB_MASTER );
+               $wgTitle = Title::newFromText( "Rebuild text index script" );
+       
+               if ( $wgDBtype == 'mysql' ) {
+                       $this->dropMysqlTextIndex();
+                       $this->populateSearchIndex();
+                       $this->createMysqlTextIndex();
+               } else {
+                       $this->clearSearchIndex();
+                       $this->populateSearchIndex();
+               }
+       
+               $this->output( "Done.\n" );
+       }
 
+       /**
+        * Populates the search index with content from all pages
+        */
+       protected function populateSearchIndex() {
+               $res = $this->db->select( 'page', 'MAX(page_id) AS count' );
+               $s = $this->db->fetchObject($res);
+               $count = $s->count;
+               $this->output( "Rebuilding index fields for {$count} pages...\n" );
+               $n = 0;
+       
+               while ( $n < $count ) {
+                       $this->output( $n . "\n" );
+                       $end = $n + self::RTI_CHUNK_SIZE - 1;
+
+                       $res = $this->db->select( array( 'page', 'revision', 'text' ), 
+                               array( 'page_id', 'page_namespace', 'page_title', 'old_flags', 'old_text' ),
+                               array( "page_id BETWEEN $n AND $end", 'page_latest = rev_id', 'rev_text_id = old_id' ),
+                               __METHOD__
+                               );
+       
+                       foreach( $res as $s ) {
+                               $revtext = Revision::getRevisionText( $s );
+                               $u = new SearchUpdate( $s->page_id, $s->page_title, $revtext );
+                               $u->doUpdate();
+                       }
+                       $this->db->freeResult( $res );
+                       $n += self::RTI_CHUNK_SIZE;
+               }
+       }
+
+       /**
+        * (MySQL only) Drops fulltext index before populating the table.
+        */
+       private function dropMysqlTextIndex() {
+               $searchindex = $this->db->tableName( 'searchindex' );
+               if ( $this->db->indexExists( 'searchindex', 'si_title' ) ) {
+                       $this->output( "Dropping index...\n" );
+                       $sql = "ALTER TABLE $searchindex DROP INDEX si_title, DROP INDEX si_text";
+                       $this->db->query($sql, __METHOD__ );
+               }
+       }
+
+       /**
+        * (MySQL only) Adds back fulltext index after populating the table.
+        */
+       private function createMysqlTextIndex() {
+               $searchindex = $this->db->tableName( 'searchindex' );
+               $this->output( "\nRebuild the index...\n" );
+               $sql = "ALTER TABLE $searchindex ADD FULLTEXT si_title (si_title), " .
+                 "ADD FULLTEXT si_text (si_text)";
+               $this->db->query( $sql, __METHOD__ );
+       }
+
+       /**
+        * Deletes everything from search index.
+        */
+       private function clearSearchIndex() {
+               $this->output( 'Clearing searchindex table...' );
+               $this->db->delete( 'searchindex', '*', __METHOD__ );
+               $this->output( "Done\n" );
+       }
+}
 
+$maintClass = "RebuildTextIndex";
+require_once( DO_MAINTENANCE );