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From "Xu Mingmin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (BEAM-2477) BeamAggregationRel should use Combine.perKey instead of GroupByKey
Date Tue, 20 Jun 2017 02:32:00 GMT

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

Xu Mingmin updated BEAM-2477:
-----------------------------
    Labels: dsl_sql_merge  (was: )

> 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
>
> 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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