jcsherin opened a new issue, #12661: URL: https://github.com/apache/datafusion/issues/12661
### Is your feature request related to a problem or challenge? 1. Reverse a user-defined window function which computes the same result but in the reverse order. 2. Add support for `IGNORE NULLS` when creating user-defined window expressions. ### Describe the solution you'd like 1. Add a new trait method `WindowUDFImpl::reverse_expr`. 2. Add `is_reversed` state field to `WindowUDFExpr` to know if the expression is reversed. 3. Add `ignore_nulls` state field to `WindowUDFExpr`. ### Describe alternatives you've considered _No response_ ### Additional context _No response_ -- 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]
