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From "Julian Hyde (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (DRILL-3840) Add support for in UDF two-phased aggregate merging for UDAFs
Date Fri, 25 Sep 2015 19:33:04 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908554#comment-14908554
] 

Julian Hyde edited comment on DRILL-3840 at 9/25/15 7:32 PM:
-------------------------------------------------------------

Suggest you build on SqlSplittableAggFunction, introduced in CALCITE-751.

And by the way I wouldn't classify this as a "codegen" problem. It needs to be a logical rewrite.
The two phases of aggregation might be done by different engines, e.g. phoenix and drill.


was (Author: julianhyde):
Suggest you build on SqlSplittableAggFunction, introduced in CALCITE-751.

> Add support for in UDF two-phased aggregate merging for UDAFs
> -------------------------------------------------------------
>
>                 Key: DRILL-3840
>                 URL: https://issues.apache.org/jira/browse/DRILL-3840
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Execution - Codegen
>            Reporter: Jacques Nadeau
>




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