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https://issues.apache.org/jira/browse/CALCITE-1345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408553#comment-15408553
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Julian Hyde commented on CALCITE-1345:
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I wrote a test case (disabled) as part of my work on CALCITE-768:
https://github.com/julianhyde/calcite/commits/768-hop.
> Streaming GROUP BY
> ------------------
>
> Key: CALCITE-1345
> URL: https://issues.apache.org/jira/browse/CALCITE-1345
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Atri Sharma
>
> Implement streaming {{GROUP BY}}, including parsing, validation, and
> execution using the Interpreter (probably a variation of AggregateNode),
> intermittently returning results when a monotonic column indicates that the
> next set of results are ready. Add test(s) to StreamingTest. Example query
> should include {{FLOOR(rowtime TO HOUR)}}; the {{TUMBLE}}, {{HOP}} and
> {{SESSION}} functions are out of scope of this JIRA case.
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