maintenance/cleanupAncientTables.php

   1 <?php
   2 /**
   3  * Cleans up old database tables, dropping old indexes and fields.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script to cleans up old database tables, dropping old indexes
  28  * and fields.
  29  *
  30  * @ingroup Maintenance
  31  */
  32 class CleanupAncientTables extends Maintenance {
  33
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->mDescription = "Cleanup ancient tables and indexes";
  37                 $this->addOption( 'force', 'Actually run this script' );
  38         }
  39
  40         public function execute() {
  41                 if ( !$this->hasOption( 'force' ) ) {
  42                         $this->error( "This maintenance script will remove old columns and indexes.\n"
  43                                 . "It is recommended to backup your database first, and ensure all your data has\n"
  44                                 . "been migrated to newer tables. If you want to continue, run this script again\n"
  45                                 . "with --force.\n"
  46                         );
  47                 }
  48
  49                 $db = wfGetDB( DB_MASTER );
  50                 $ancientTables = array(
  51                         'blobs', // 1.4
  52                         'brokenlinks', // 1.4
  53                         'cur', // 1.4
  54                         'ip_blocks_old', // Temporary in 1.6
  55                         'links', // 1.4
  56                         'linkscc', // 1.4
  57                         // 'math', // 1.18, but don't want to drop if math extension is enabled...
  58                         'old', // 1.4
  59                         'oldwatchlist', // pre 1.1?
  60                         'trackback', // 1.19
  61                         'user_rights', // 1.5
  62                         'validate', // 1.6
  63                 );
  64
  65                 foreach ( $ancientTables as $table ) {
  66                         if ( $db->tableExists( $table, __METHOD__ ) ) {
  67                                 $this->output( "Dropping table $table..." );
  68                                 $db->dropTable( $table, __METHOD__ );
  69                                 $this->output( "done.\n" );
  70                         }
  71                 }
  72
  73                 $this->output( "Cleaning up text table\n" );
  74
  75                 $oldIndexes = array(
  76                         'old_namespace',
  77                         'old_timestamp',
  78                         'name_title_timestamp',
  79                         'user_timestamp',
  80                         'usertext_timestamp',
  81                 );
  82                 foreach ( $oldIndexes as $index ) {
  83                         if ( $db->indexExists( 'text', $index, __METHOD__ ) ) {
  84                                 $this->output( "Dropping index $index from the text table..." );
  85                                 $db->query( "DROP INDEX " . $db->addIdentifierQuotes( $index )
  86                                         . " ON " . $db->tableName( 'text' ) );
  87                                 $this->output( "done.\n" );
  88                         }
  89                 }
  90
  91                 $oldFields = array(
  92                         'old_namespace',
  93                         'old_title',
  94                         'old_comment',
  95                         'old_user',
  96                         'old_user_text',
  97                         'old_timestamp',
  98                         'old_minor_edit',
  99                         'inverse_timestamp',
 100                 );
 101                 foreach ( $oldFields as $field ) {
 102                         if ( $db->fieldExists( 'text', $field, __METHOD__ ) ) {
 103                                 $this->output( "Dropping the $field field from the text table..." );
 104                                 $db->query( "ALTER TABLE  " . $db->tableName( 'text' )
 105                                         . " DROP COLUMN " . $db->addIdentifierQuotes( $field ) );
 106                                 $this->output( "done.\n" );
 107                         }
 108                 }
 109                 $this->output( "Done!\n" );
 110         }
 111 }
 112
 113 $maintClass = "CleanupAncientTables";
 114 require_once RUN_MAINTENANCE_IF_MAIN;