From Joomla! Documentation
The "API17" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
- Defined in libraries/joomla/database/databaseexception.php
jimport( 'joomla.database.databaseexception' );