message: fix(sqllab): SqlJsonExecutionContext.query null pointer
diff: @@ -180,7 +180,7 @@ class SqlJsonExecutionContext: # pylint: disable=too-many-instance-attributes
  def get_query_details(self) -> str:
  try:
  - if self.query:
  + if hasattr(self, "query"):
  if self.query.id:
  return "query '{}' - '{}'".format(self.query.id, self.query.sql)
  except DetachedInstanceError:
  