benmayersohn opened a new issue, #49855: URL: https://github.com/apache/doris/issues/49855
### Search before asking - [x] I had searched in the [issues](https://github.com/apache/doris/issues?q=is%3Aissue) and found no similar issues. ### Version 3.0.3-rc04 ### What's Wrong? It appears the `ignore_null` argument does nothing in the FIRST_VALUE/LAST_VALUE window functions. Example: ```sql SELECT id, val, LAST_VALUE(val, true) OVER (ORDER BY id ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS last_val FROM ( SELECT 1 AS id, NULL AS val UNION ALL SELECT 2, NULL UNION ALL SELECT 3, 10 UNION ALL SELECT 4, NULL ) t; ``` This yields: id | val | last_val -- | -- | -- 1 | | 2 | | 3 | 10 | 10 4 | | The same is true if we use `FIRST_VALUE` and reverse the sort direction: ```sql SELECT id, val, FIRST_VALUE(val, true) OVER (ORDER BY id DESC ROWS BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING) AS last_val FROM ( SELECT 1 AS id, NULL AS val UNION ALL SELECT 2, NULL UNION ALL SELECT 3, 10 UNION ALL SELECT 4, NULL ) t ORDER BY id; ``` This yields the same output: id | val | last_val -- | -- | -- 1 | | 2 | | 3 | 10 | 10 4 | | ### What You Expected? I expected the value 10 to be carried forward to the 4th row, i.e: id | val | last_val -- | -- | -- 1 | | 2 | | 3 | 10 | 10 4 | | 10 ### How to Reproduce? Run the example query and observe the issue. ### Anything Else? _No response_ ### Are you willing to submit PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- 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: commits-unsubscr...@doris.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
