MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / maintenance / cleanupAncientTables.php

diff --git a/maintenance/cleanupAncientTables.php b/maintenance/cleanupAncientTables.php
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+++ b/maintenance/cleanupAncientTables.php
@@ -0,0 +1,114 @@
+<?php
+/**
+ * Cleans up old database tables, dropping old indexes and fields.
+ *
+ * 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
+ *
+ * @file
+ * @ingroup Maintenance
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script to cleans up old database tables, dropping old indexes
+ * and fields.
+ *
+ * @ingroup Maintenance
+ */
+class CleanupAncientTables extends Maintenance {
+
+       public function __construct() {
+               parent::__construct();
+               $this->addDescription( 'Cleanup ancient tables and indexes' );
+               $this->addOption( 'force', 'Actually run this script' );
+       }
+
+       public function execute() {
+               if ( !$this->hasOption( 'force' ) ) {
+                       $this->error( "This maintenance script will remove old columns and indexes.\n"
+                               . "It is recommended to backup your database first, and ensure all your data has\n"
+                               . "been migrated to newer tables. If you want to continue, run this script again\n"
+                               . "with --force.\n"
+                       );
+               }
+
+               $db = $this->getDB( DB_MASTER );
+               $ancientTables = [
+                       'blobs', // 1.4
+                       'brokenlinks', // 1.4
+                       'cur', // 1.4
+                       'ip_blocks_old', // Temporary in 1.6
+                       'links', // 1.4
+                       'linkscc', // 1.4
+                       // 'math', // 1.18, but don't want to drop if math extension is enabled...
+                       'old', // 1.4
+                       'oldwatchlist', // pre 1.1?
+                       'trackback', // 1.19
+                       'user_rights', // 1.5
+                       'validate', // 1.6
+               ];
+
+               foreach ( $ancientTables as $table ) {
+                       if ( $db->tableExists( $table, __METHOD__ ) ) {
+                               $this->output( "Dropping table $table..." );
+                               $db->dropTable( $table, __METHOD__ );
+                               $this->output( "done.\n" );
+                       }
+               }
+
+               $this->output( "Cleaning up text table\n" );
+
+               $oldIndexes = [
+                       'old_namespace',
+                       'old_timestamp',
+                       'name_title_timestamp',
+                       'user_timestamp',
+                       'usertext_timestamp',
+               ];
+               foreach ( $oldIndexes as $index ) {
+                       if ( $db->indexExists( 'text', $index, __METHOD__ ) ) {
+                               $this->output( "Dropping index $index from the text table..." );
+                               $db->query( "DROP INDEX " . $db->addIdentifierQuotes( $index )
+                                       . " ON " . $db->tableName( 'text' ) );
+                               $this->output( "done.\n" );
+                       }
+               }
+
+               $oldFields = [
+                       'old_namespace',
+                       'old_title',
+                       'old_comment',
+                       'old_user',
+                       'old_user_text',
+                       'old_timestamp',
+                       'old_minor_edit',
+                       'inverse_timestamp',
+               ];
+               foreach ( $oldFields as $field ) {
+                       if ( $db->fieldExists( 'text', $field, __METHOD__ ) ) {
+                               $this->output( "Dropping the $field field from the text table..." );
+                               $db->query( "ALTER TABLE  " . $db->tableName( 'text' )
+                                       . " DROP COLUMN " . $db->addIdentifierQuotes( $field ) );
+                               $this->output( "done.\n" );
+                       }
+               }
+               $this->output( "Done!\n" );
+       }
+}
+
+$maintClass = "CleanupAncientTables";
+require_once RUN_MAINTENANCE_IF_MAIN;