ding-young commented on PR #15589: URL: https://github.com/apache/datafusion/pull/15589#issuecomment-2781281225
@2010YOUY01 Instead of applying transformation on filter expression, I adjusted the rule to transform x=x into `x IS NOT NULL OR NULL`. This preserves the behavior where NULL = NULL evaluates to NULL, which is treated as FALSE in filter expressions. About the performance, I'm not 100% sure whether this rule worth the change, but I made this change because `IS NOT NULL OR NULL` was a bit better than actual comparision.  -- 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: github-unsubscr...@datafusion.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
