[jira] [Created] (FLINK-4691) Add group-windows for streaming tables

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-4691:
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             Summary: Add group-windows for streaming tables
                 Key: FLINK-4691
                 URL: https://issues.apache.org/jira/browse/FLINK-4691
             Project: Flink
          Issue Type: Sub-task
          Components: Table API & SQL
            Reporter: Timo Walther
            Assignee: Timo Walther


Add Tumble, Slide, Session group-windows for streaming tables as described in [FLIP-11|https://cwiki.apache.org/confluence/display/FLINK/FLIP-11%3A+Table+API+Stream+Aggregations].

Implementation of group-windows on streaming tables. This includes implementing the API of group-windows, the logical validation for group-windows, and the definition of the “rowtime” and “systemtime” keywords. Group-windows on batch tables won’t be initially supported and will throw an exception.



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