[Summary view] [Print] [Text view]

   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;