LiBinfeng-01 opened a new pull request, #24427: URL: https://github.com/apache/doris/pull/24427
## Proposed changes Problem: when doing case when which can transform to if-function, datatype in if-function would be wrong to match cast outside case when Example: select cast (case when BITMAP_EMPTY() is NULL then null else null end as bitmap) is NULL; Reason: when optimizer fould case when can transform to if-function, it would transform to it with first matched function signature. But null can match to any signature, so the types of if-function go wrong Solved: add NullType prosess in if-function signature ## Further comments If this is a relatively large or complex change, kick off the discussion at [[email protected]](mailto:[email protected]) by explaining why you chose the solution you did and what alternatives you considered, etc... -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
