[GitHub] [arrow-datafusion] comphead commented on issue #6385: UNION ALL aliasing is wrong on more complicated queries

["comphead (via GitHub)" <gi...@apache.org>]

comphead commented on issue #6385:
URL: https://github.com/apache/arrow-datafusion/issues/6385#issuecomment-1553599896

   A specific case of the bug is 
   ```
   WITH w1 AS (select 1 as x , max(10) as y), w2 AS (select 5 as n_regionkey)
   select count(*) count, n_regionkey from w2 group by n_regionkey
   union all
   select x, y from w1;
   +---+----+
   | x | y  |
   +---+----+
   | 1 | 10 |
   | 1 | 5  |
   +---+----+
   ```


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