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https://issues.apache.org/jira/browse/FLINK-22160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leonard Xu resolved FLINK-22160.
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Resolution: Resolved
> Test Window TVF based aggregation and TopN
> ------------------------------------------
>
> Key: FLINK-22160
> URL: https://issues.apache.org/jira/browse/FLINK-22160
> Project: Flink
> Issue Type: Test
> Components: Table SQL / API
> Reporter: Jark Wu
> Assignee: Leonard Xu
> Priority: Blocker
> Labels: release-testing
> Fix For: 1.13.0
>
>
> In FLINK-19604
> ([FLIP-145|https://cwiki.apache.org/confluence/display/FLINK/FLIP-145%3A+Support+SQL+windowing+table-valued+function]),
> we introduced a new syntax to express Window Aggregate and Window TopN. For
> Window Aggregate, we have also introduced a new window kind: cumulate
> windows.
> The scope of this task is to make sure:
> 1. The old window aggergate syntax ({{GROUP BY TUMBLE(...)}}) can be rewrite
> using the new syntax, and get the same results. Note, session window is not
> supported yet in the new syntax.
> 2. Verify the new CUMULATE window works as expect
> 3. Verify the new Window TopN workss as expect
> 4. Failure and recovery and rescale case: results are still correct.
> 5. Window emitting: window should be fired once watermark advances window end
> (we can manually generate source data with monotonically and slowly
> increasing timestamp)
> 6. The feature is well-documented
> Note: the documentation for this feature is still going on (FLINK-22159), for
> testing the feature, we can use the FLIP documentation as an instruction for
> now.
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