Get the results of ``query``.  This method does flush in a
			transaction, so any objects retrieved which are not in the cache
			which would be updated when the transaction finishes will be
			stale

def execute_query(self, query, session):
		''' Get the results of ``query``.  This method does flush in a
			transaction, so any objects retrieved which are not in the cache
			which would be updated when the transaction finishes will be
			stale '''
		self.auto_ensure_indexes(query.type)

		kwargs = dict()
		if query._get_fields():
			if PYMONGO_3: # pragma: nocover
				kwargs['projection'] = query._fields_expression()
			else: # pragma: nocover
				kwargs['fields'] = query._fields_expression()

		collection = self.db[query.type.get_collection_name()]
		
		if query._search:
			index_fields = query._createIndex
			if index_fields:
				# create new index
				if type(index_fields) is list:
					index_list = []
					for field in index_fields:
						index_list.append ((field, pymongo.TEXT))
					collection.create_index(index_list, name='search_index', default_language='english')
				else:
					raise InvalidConfigException()
			cursor = collection.find(query.query, {'__index_score': {'$meta': "textScore"}}, **kwargs)
			cursor.sort([('__index_score', {'$meta': 'textScore'})])
		elif query._rawquery:
			if query._query_type=='aggregate':
				cursor = collection.aggregate(query.query, cursor={}, **kwargs)
			elif query._query_type=='map_reduce':
				cursor = collection.map_reduce( query._mapreduce_mapper, query._mapreduce_reducer, query._mapreduce_key, query=query._mapreduce_query)
		else:
			cursor = collection.find(query.query, **kwargs)

		if query._sort:
			cursor.sort(query._sort)
		elif query.type.config_default_sort:
			cursor.sort(query.type.config_default_sort)
		if query.hints:
			cursor.hint(query.hints)
		if query._get_limit() is not None:
			cursor.limit(query._get_limit())
		if query._get_skip() is not None:
			cursor.skip(query._get_skip())
		return QueryResult(session, cursor, query.type, raw_output=query._raw_output, fields=query._get_fields())