You are viewing a plain text version of this content. The canonical link for it is here.

Posted to github@arrow.apache.org by "sergiimk (via GitHub)" <gi...@apache.org> on 2023/05/29 23:46:00 UTC

[GitHub] [arrow-datafusion] sergiimk commented on issue #6463: UNION ALL schema harmonization failure in subquery/view

sergiimk commented on issue #6463:
URL: https://github.com/apache/arrow-datafusion/issues/6463#issuecomment-1567599415

   Note: I was trying to use `COALESCE(nullable_column, 'unknown')` to try to unify nullability of tables before `UNION` but looks like Datafusion does not pick up on the fact that this expression can never produce `NULL`, so the resulting field is still nullable.


-- 
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: github-unsubscribe@arrow.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org