/**
* Lists all the VIEWs in the database
*
- * @param string $prefix Only show VIEWs with this prefix, eg. unit_test_
+ * @param string|null $prefix Only show VIEWs with this prefix, eg. unit_test_
* @param string $fname Name of calling function
* @throws RuntimeException
* @return array
/**
* List all tables on the database
*
- * @param string $prefix Only show tables with this prefix, e.g. mw_
+ * @param string|null $prefix Only show tables with this prefix, e.g. mw_
* @param string $fname Calling function name
* @throws DBError
* @return array