maintenance/renameDbPrefix.php

   1 <?php
   2 /**
   3  * Run this script to after changing $wgDBprefix on a wiki.
   4  * The wiki will have to get downtime to do this correctly.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  25
  26 class RenameDbPrefix extends Maintenance {
  27         public function __construct() {
  28                 parent::__construct();
  29                 $this->addOption( "old", "Old db prefix [0 for none]", true, true );
  30                 $this->addOption( "new", "New db prefix [0 for none]", true, true );
  31         }
  32
  33         public function getDbType() {
  34                 return Maintenance::DB_ADMIN;
  35         }
  36
  37         public function execute() {
  38                 global $wgDBname;
  39
  40                 // Allow for no old prefix
  41                 if ( $this->getOption( 'old', 0 ) === '0' ) {
  42                         $old = '';
  43                 } else {
  44                         // Use nice safe, sane, prefixes
  45                         preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'old' ), $m );
  46                         $old = isset( $m[0] ) ? $m[0] : false;
  47                 }
  48                 // Allow for no new prefix
  49                 if ( $this->getOption( 'new', 0 ) === '0' ) {
  50                         $new = '';
  51                 } else {
  52                         // Use nice safe, sane, prefixes
  53                         preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'new' ), $m );
  54                         $new = isset( $m[0] ) ? $m[0] : false;
  55                 }
  56
  57                 if ( $old === false || $new === false ) {
  58                         $this->error( "Invalid prefix!", true );
  59                 }
  60                 if ( $old === $new ) {
  61                         $this->output( "Same prefix. Nothing to rename!\n", true );
  62                 }
  63
  64                 $this->output( "Renaming DB prefix for tables of $wgDBname from '$old' to '$new'\n" );
  65                 $count = 0;
  66
  67                 $dbw = wfGetDB( DB_MASTER );
  68                 $res = $dbw->query( "SHOW TABLES LIKE '" . $dbw->escapeLike( $old ) . "%'" );
  69                 foreach ( $res as $row ) {
  70                         // XXX: odd syntax. MySQL outputs an oddly cased "Tables of X"
  71                         // sort of message. Best not to try $row->x stuff...
  72                         $fields = get_object_vars( $row );
  73                         // Silly for loop over one field...
  74                         foreach ( $fields as $table ) {
  75                                 // $old should be regexp safe ([a-zA-Z_])
  76                                 $newTable = preg_replace( '/^' . $old . '/', $new, $table );
  77                                 $this->output( "Renaming table $table to $newTable\n" );
  78                                 $dbw->query( "RENAME TABLE $table TO $newTable" );
  79                         }
  80                         $count++;
  81                 }
  82                 $this->output( "Done! [$count tables]\n" );
  83         }
  84 }
  85
  86 $maintClass = "RenameDbPrefix";
  87 require_once( DO_MAINTENANCE );