HappenLee opened a new issue #7901: URL: https://github.com/apache/incubator-doris/issues/7901
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and found no similar issues. ### Description 1. shoule adjust the out join column to nullable `select * from t1 left join t2 on t1.a = t2.a` all slots of the t2 shoule be nullable change in join node. 2. Adjust the join column of non nullaware join to non nullable `select * from t1 join t2 on t1.a = t2.a` if a is a nullable column shoule change to not nullable, because of join column `=` will skip the null. 3. Useless columns do not need to be output， here need a projection to reduce the column output to speed up the join operator. ### Use case _No response_ ### Related issues _No response_ ### Are you willing to submit PR? - [X] 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: [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]
