- Fixed bug in contains_agg where we didn't check if self.is_func before checking args
- Fixed bug in get_sql_for_data_type where we used VarChar.MAX instead of String.MAX for
String data type
- Improved naming of query execution threads
- Renamed create_aggregate to require_aggregate because aggregate may not be created when
it's set to false
Change-Id: I2d7601983113e1452f9da54eac62e9c4dd6b7a7f