FjodorGit opened a new issue, #21957:
URL: https://github.com/apache/datafusion/issues/21957
### Is your feature request related to a problem or challenge?
array_agg currently works as a window aggregate for ever-expanding frames
such as ```ROW BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW```, but it cannot be
used with bounded/sliding frames because its accumulator does not implement
retract_batch.
### Describe the solution you'd like
It would be useful to implement retract_batch for at least the non-DISTINCT
array_agg accumulator such that at least such a query would be possible
```sql
SELECT array_agg(x) OVER (
ORDER BY t
ROWS BETWEEN 1 PRECEDING AND CURRENT ROW
)
FROM ...```
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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