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Posted to commits@beam.apache.org by "Jingsong Lee (JIRA)" <ji...@apache.org> on 2017/06/24 10:40:00 UTC

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

     [ https://issues.apache.org/jira/browse/BEAM-2477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jingsong Lee closed BEAM-2477.
------------------------------

> 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
>              Labels: dsl_sql_merge
>             Fix For: Not applicable
>
>
> 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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