jackwener commented on PR #5430: URL: https://github.com/apache/arrow-datafusion/pull/5430#issuecomment-1450160541
> @ygf11 @jackwener I'm not sure whether we should make the rule `ReplaceDistinctWithAggregate` to handle the where-in/exists subquery specifically. My original thinking was let the rules `DecorrelateWhereExists` and `DecorrelateWhereIn` rewrite the subqueries to Joins and in the second pass the rule `ReplaceDistinctWithAggregate` will rewrite the `Distinct` to `Aggregate` since we already run those rules multiple times, so that we can keep a relatively simple `ReplaceDistinctWithAggregate` rule. > > For those expr subqueries that can not be decorrelated, we can create another optimization task and apply all the existing rules to them Agree with it -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
