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| 1 | <?php |
| 2 | /** |
| 3 | * Change the prefix of database tables. |
| 4 | * Run this script to after changing $wgDBprefix on a wiki. |
| 5 | * The wiki will have to get downtime to do this correctly. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * http://www.gnu.org/copyleft/gpl.html |
| 21 | * |
| 22 | * @file |
| 23 | * @ingroup Maintenance |
| 24 | */ |
| 25 | |
| 26 | use MediaWiki\MainConfigNames; |
| 27 | |
| 28 | require_once __DIR__ . '/Maintenance.php'; |
| 29 | |
| 30 | /** |
| 31 | * Maintenance script that changes the prefix of database tables. |
| 32 | * |
| 33 | * @ingroup Maintenance |
| 34 | */ |
| 35 | class RenameDbPrefix extends Maintenance { |
| 36 | public function __construct() { |
| 37 | parent::__construct(); |
| 38 | $this->addOption( "old", "Old db prefix [0 for none]", true, true ); |
| 39 | $this->addOption( "new", "New db prefix [0 for none]", true, true ); |
| 40 | } |
| 41 | |
| 42 | public function getDbType() { |
| 43 | return Maintenance::DB_ADMIN; |
| 44 | } |
| 45 | |
| 46 | public function execute() { |
| 47 | $dbName = $this->getConfig()->get( MainConfigNames::DBname ); |
| 48 | |
| 49 | // Allow for no old prefix |
| 50 | if ( $this->getOption( 'old', 0 ) === '0' ) { |
| 51 | $old = ''; |
| 52 | } else { |
| 53 | // Use nice safe, sensible, prefixes |
| 54 | preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'old' ), $m ); |
| 55 | $old = $m[0] ?? false; |
| 56 | } |
| 57 | // Allow for no new prefix |
| 58 | if ( $this->getOption( 'new', 0 ) === '0' ) { |
| 59 | $new = ''; |
| 60 | } else { |
| 61 | // Use nice safe, sensible, prefixes |
| 62 | preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'new' ), $m ); |
| 63 | $new = $m[0] ?? false; |
| 64 | } |
| 65 | |
| 66 | if ( $old === false || $new === false ) { |
| 67 | $this->fatalError( "Invalid prefix!" ); |
| 68 | } |
| 69 | if ( $old === $new ) { |
| 70 | $this->output( "Same prefix. Nothing to rename!\n", true ); |
| 71 | } |
| 72 | |
| 73 | $this->output( "Renaming DB prefix for tables of $dbName from '$old' to '$new'\n" ); |
| 74 | $count = 0; |
| 75 | |
| 76 | $dbw = $this->getPrimaryDB(); |
| 77 | $res = $dbw->query( "SHOW TABLES " . $dbw->buildLike( $old, $dbw->anyString() ), __METHOD__ ); |
| 78 | foreach ( $res as $row ) { |
| 79 | // XXX: odd syntax. MySQL outputs an oddly cased "Tables of X" |
| 80 | // sort of message. Best not to try $row->x stuff... |
| 81 | $fields = get_object_vars( $row ); |
| 82 | // Silly for loop over one field... |
| 83 | foreach ( $fields as $table ) { |
| 84 | // $old should be regexp safe ([a-zA-Z_]) |
| 85 | $newTable = preg_replace( '/^' . $old . '/', $new, $table ); |
| 86 | $this->output( "Renaming table $table to $newTable\n" ); |
| 87 | $oldTableEnc = $dbw->addIdentifierQuotes( $table ); |
| 88 | $newTableEnc = $dbw->addIdentifierQuotes( $newTable ); |
| 89 | $dbw->query( "RENAME TABLE $oldTableEnc TO $newTableEnc", __METHOD__ ); |
| 90 | } |
| 91 | $count++; |
| 92 | } |
| 93 | $this->output( "Done! [$count tables]\n" ); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | $maintClass = RenameDbPrefix::class; |
| 98 | require_once RUN_MAINTENANCE_IF_MAIN; |