1 files changed, 94 insertions, 0 deletions
diff --git a/www/wiki/maintenance/renameDbPrefix.php b/www/wiki/maintenance/renameDbPrefix.php
new file mode 100644
index 00000000..af8a2802
--- /dev/null
+++ b/www/wiki/maintenance/renameDbPrefix.php
@@ -0,0 +1,94 @@
+<?php
+/**
+ * Change the prefix of database tables.
+ * Run this script to after changing $wgDBprefix on a wiki.
+ * The wiki will have to get downtime to do this correctly.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Maintenance
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script that changes the prefix of database tables.
+ *
+ * @ingroup Maintenance
+ */
+class RenameDbPrefix extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->addOption( "old", "Old db prefix [0 for none]", true, true );
+		$this->addOption( "new", "New db prefix [0 for none]", true, true );
+	}
+
+	public function getDbType() {
+		return Maintenance::DB_ADMIN;
+	}
+
+	public function execute() {
+		global $wgDBname;
+
+		// Allow for no old prefix
+		if ( $this->getOption( 'old', 0 ) === '0' ) {
+			$old = '';
+		} else {
+			// Use nice safe, sane, prefixes
+			preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'old' ), $m );
+			$old = isset( $m[0] ) ? $m[0] : false;
+		}
+		// Allow for no new prefix
+		if ( $this->getOption( 'new', 0 ) === '0' ) {
+			$new = '';
+		} else {
+			// Use nice safe, sane, prefixes
+			preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'new' ), $m );
+			$new = isset( $m[0] ) ? $m[0] : false;
+		}
+
+		if ( $old === false || $new === false ) {
+			$this->fatalError( "Invalid prefix!" );
+		}
+		if ( $old === $new ) {
+			$this->output( "Same prefix. Nothing to rename!\n", true );
+		}
+
+		$this->output( "Renaming DB prefix for tables of $wgDBname from '$old' to '$new'\n" );
+		$count = 0;
+
+		$dbw = $this->getDB( DB_MASTER );
+		$res = $dbw->query( "SHOW TABLES " . $dbw->buildLike( $old, $dbw->anyString() ) );
+		foreach ( $res as $row ) {
+			// XXX: odd syntax. MySQL outputs an oddly cased "Tables of X"
+			// sort of message. Best not to try $row->x stuff...
+			$fields = get_object_vars( $row );
+			// Silly for loop over one field...
+			foreach ( $fields as $table ) {
+				// $old should be regexp safe ([a-zA-Z_])
+				$newTable = preg_replace( '/^' . $old . '/', $new, $table );
+				$this->output( "Renaming table $table to $newTable\n" );
+				$dbw->query( "RENAME TABLE $table TO $newTable" );
+			}
+			$count++;
+		}
+		$this->output( "Done! [$count tables]\n" );
+	}
+}
+
+$maintClass = RenameDbPrefix::class;
+require_once RUN_MAINTENANCE_IF_MAIN;