comphead commented on PR #5748: URL: https://github.com/apache/arrow-datafusion/pull/5748#issuecomment-1485476174
I think its not that easy for analyzer to identify correct nullable flags without scanning entire data. for LEFT join it assumes right side cannot be matched and sets nullable and this sounds correct for me. From other side we also have similar weaken check in optimizer https://github.com/apache/arrow-datafusion/blob/26b8377b0690916deacf401097d688699026b8fb/datafusion/optimizer/src/optimizer.rs#L423 -- 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]
