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Posted to issues@calcite.apache.org by "Chunwei Lei (JIRA)" <ji...@apache.org> on 2019/05/10 09:43:01 UTC

[jira] [Assigned] (CALCITE-907) Add AggregateExchangeTransposeRule

     [ https://issues.apache.org/jira/browse/CALCITE-907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chunwei Lei reassigned CALCITE-907:
-----------------------------------

    Assignee: Chunwei Lei

> Add AggregateExchangeTransposeRule
> ----------------------------------
>
>                 Key: CALCITE-907
>                 URL: https://issues.apache.org/jira/browse/CALCITE-907
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Julian Hyde
>            Assignee: Chunwei Lei
>            Priority: Major
>
> A rule that would recognize an Aggregate on top of an Exchange and push down the aggregation. The result is a local Aggregate followed by an Exchange followed by a summarizing Aggregate.
> It would exploit SqlSplittableAggFunction, similar to CALCITE-751.



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