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Fabian Hueske commented on FLINK-6335:
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Hi [~wheat9],
for which types of aggregations is this issue intended?
- group window aggregates: {{SELECT a, SUM(b) FROM t GROUP BY a,
TUMBLE(rowTime(), ...}}
- over window aggregates: {{SELECT a, SUM(b) OVER (ORDER BY rowTime()...) FROM t
- non-windowed aggregates: {{SELECT a, SUM(b) FROM t GROUP BY a}}
- DISTINCT OVER windows are not yet supported by Calcite. [~stefano.bortoli]
and [~rtudoran] are working on that.
- non-windowed aggregates are not in the master but merged to the
{{table-retraction}} branch.
Thanks, Fabian
> Support DISTINCT over grouped window in stream SQL
> --------------------------------------------------
>
> Key: FLINK-6335
> URL: https://issues.apache.org/jira/browse/FLINK-6335
> Project: Flink
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> The SQL on the batch side supports the {{DISTINCT}} keyword over aggregation.
> This jira proposes to support the {{DISTINCT}} keyword on streaming
> aggregation using the same technique on the batch side.
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