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( "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 execute() {
  34                 // Allow for no old prefix
  35                 if( $this->getOption( 'old', 0 ) === '0' ) {
  36                         $old = '';
  37                 } else {
  38                         // Use nice safe, sane, prefixes
  39                         preg_match( '/^[a-zA-Z]+_$/', $this->getOption('old'), $m );
  40                         $old = isset( $m[0] ) ? $m[0] : false;
  41                 }
  42                 // Allow for no new prefix
  43                 if( $this->getOption( 'new', 0 ) === '0' ) {
  44                         $new = '';
  45                 } else {
  46                         // Use nice safe, sane, prefixes
  47                         preg_match( '/^[a-zA-Z]+_$/', $this->getOption('new'), $m );
  48                         $new = isset( $m[0] ) ? $m[0] : false;
  49                 }
  50
  51                 if( $old === false || $new === false ) {
  52                         $this->error( "Invalid prefix!\n", true );
  53                 }
  54                 if( $old === $new ) {
  55                         $this->output( "Same prefix. Nothing to rename!\n", true );
  56                 }
  57
  58                 $this->output( "Renaming DB prefix for tables of $wgDBname from '$old' to '$new'\n" );
  59                 $count = 0;
  60
  61                 $dbw = wfGetDB( DB_MASTER );
  62                 $res = $dbw->query( "SHOW TABLES LIKE '".$dbw->escapeLike( $old )."%'" );
  63                 foreach( $res as $row ) {
  64                         // XXX: odd syntax. MySQL outputs an oddly cased "Tables of X"
  65                         // sort of message. Best not to try $row->x stuff...
  66                         $fields = get_object_vars( $row );
  67                         // Silly for loop over one field...
  68                         foreach( $fields as $resName => $table ) {
  69                                 // $old should be regexp safe ([a-zA-Z_])
  70                                 $newTable = preg_replace( '/^'.$old.'/', $new, $table );
  71                                 $this->output( "Renaming table $table to $newTable\n" );
  72                                 $dbw->query( "RENAME TABLE $table TO $newTable" );
  73                         }
  74                         $count++;
  75                 }
  76                 $this->output( "Done! [$count tables]\n" );
  77         }
  78 }
  79
  80 $maintClass = "RenameDbPrefix";
  81 require_once( DO_MAINTENANCE );