Method flatten

tests/comparison/query_flattener.py:127–135

This function is idempotent.

(self, query, inner=False)

      self.flatten_join_clause(join_clause, query)

  def flatten(self, query, inner=False):
    '''This function is idempotent.'''
    if not inner:
      self.clear_state()
    if not getattr(query, 'flattened', False):
      self.flatten_from_clause(query.from_clause, query)
      for nested_query in query.nested_queries:
        self.flatten(nested_query, inner=True)
      query.flattened = True

  def convert_correlated_collection_to_inline_view(self, original_collection):
    '''Converts the given collection to an inline view. The collection must be correlated,