starocean999 opened a new pull request, #28771:
URL: https://github.com/apache/doris/pull/28771
## Proposed changes
```
select
1,
id / (select max(id) from t2) as 'x',
count(distinct c) as 'y'
from
t2
group by
1,
x
```
in above sql, Alias(x) may be bound both in binding agg output and binding
group by expr. This pr fix the problem and make sure the Alias(x) can be bound
only once.
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