def set_qdata(union, noinvariant):

    pass

class SQLGenAnnotator(object):

    def __init__(self, schema):

        self.schema = schema

        self.nfdomain = frozenset(eschema.type for eschema in schema.entities()

                                  if not eschema.is_final())

    def annotate(self, rqlst):

        rqlst.has_text_query = False

        rqlst.need_distinct = False