xiangfu0 commented on issue #7546:
URL: https://github.com/apache/pinot/issues/7546#issuecomment-956982292
> I've just tested after compiling Pinot from master, and the issue still
exists.
>
> ```sql
> SELECT CAST(calcs.int1 AS FLOAT) AS TEMP_Test__3817907367__0_
> FROM calcs
> GROUP BY 1
> ```
>
> ```json
> {
> "resultTable": {
> "dataSchema": {
> "columnNames": [
> "cast(int1,'FLOAT')"
> ],
> "columnDataTypes": [
> "FLOAT"
> ]
> }, ...
> ```
The issue here is that in
`NonAggregationGroupByToDistinctQueryRewriter.java`, Pinot rewrite this query
```SELECT CAST(calcs.int1 AS FLOAT) AS TEMP_Test__3817907367__0_
FROM calcs
GROUP BY 1
```
to
```SELECT DISTINCT calcs.int1
FROM calcs
```
And it loses the alias information.
@Jackie-Jiang
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