+<?php
+/**
+ * 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 Database
+ */
+
+namespace Wikimedia\Rdbms;
+
+use Exception;
+
+/**
+ * Database error base class
+ * @ingroup Database
+ */
+class DBError extends Exception {
+ /** @var IDatabase|null */
+ public $db;
+
+ /**
+ * Construct a database error
+ * @param IDatabase $db Object which threw the error
+ * @param string $error A simple error message to be used for debugging
+ */
+ public function __construct( IDatabase $db = null, $error ) {
+ $this->db = $db;
+ parent::__construct( $error );
+ }
+}
+
+class_alias( DBError::class, 'DBError' );