xiangfu0 opened a new pull request, #13146:
URL: https://github.com/apache/pinot/pull/13146
- Support `WITHIN GROUP` Clause in MultiStage Engine
-- Ensure there is an EXCHANGE node below AggregateNode
-- Sort data in intermediate stage
- Support `ListAgg` agg function
- Support passing `Distinct` flag to `ListAgg` implementation
Sample query:
```
SELECT
Origin, Dest,
LISTAGG(distinct Carrier, ', ') WITHIN GROUP (ORDER BY Carrier)
FROM
airlineStats
GROUP BY
Dest, Origin
```
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