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Posted to commits@beam.apache.org by "Jingsong Lee (JIRA)" <ji...@apache.org> on 2017/06/20 01:09:00 UTC

[jira] [Created] (BEAM-2477) BeamAggregationRel should use Combine.perKey instead of GroupByKey

Jingsong Lee created BEAM-2477:
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             Summary: BeamAggregationRel should use Combine.perKey instead of GroupByKey
                 Key: BEAM-2477
                 URL: https://issues.apache.org/jira/browse/BEAM-2477
             Project: Beam
          Issue Type: Improvement
          Components: dsl-sql
            Reporter: Jingsong Lee
            Assignee: Jingsong Lee


Their semantics are the same, but the efficiency of implementation is quite different, and at the runner level there is a lot of optimization for `Combine.perKey`.



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