parameters: (self, *args, **kwargs)
docstring: Adds extra SQL fragments to the query.
docstring_summary: Adds extra SQL fragments to the query.
docstring_tokens: Adds extra SQL fragments to the query .
function: def extra(self, *args, **kwargs):
      """
      Adds extra SQL fragments to the query.
      """
function_tokens: def extra ( self , * args , * * kwargs ) :