def ResetGroupBy (self):
		"""
		Clear groupby settings (for multi-queries).
		"""
		self._groupby = bytearray()
		self._groupfunc = SPH_GROUPBY_DAY
		self._groupsort = str_bytes('@group desc')
		self._groupdistinct = bytearray()

		Clear groupby settings (for multi-queries).
		
plugins/sphinx/class/sphinxapi.py