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[jira] [Created] (FLINK-10259) Key validation for GroupWindowAggregate is broken

Fabian Hueske created FLINK-10259:

             Summary: Key validation for GroupWindowAggregate is broken
                 Key: FLINK-10259
                 URL: https://issues.apache.org/jira/browse/FLINK-10259
             Project: Flink
          Issue Type: Bug
          Components: Table API & SQL
            Reporter: Fabian Hueske
             Fix For: 1.6.1, 1.7.0, 1.5.4

WindowGroups have multiple equivalent keys (start, end) that should be handled differently from other keys. The {{UpdatingPlanChecker}} uses equivalence groups to identify equivalent keys but the keys of WindowGroups are not correctly assigned to groups.

This means that we cannot correctly extract keys from queries that use group windows.

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