-- Bugfix in assert_type constructor: If the type filtering leaves no type    we can be sure that the relation will be empty.
-- Bugfix in assert_type constructor: If the type filtering leaves no type
   we can be sure that the relation will be empty.

   Thus instead of a type assert operator an empty table is returned.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb