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https://issues.apache.org/jira/browse/IMPALA-13637?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910424#comment-17910424
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ASF subversion and git services commented on IMPALA-13637:
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Commit 23edbde7c73c089f5409f6feb574320d767a8eda in impala's branch
refs/heads/master from Riza Suminto
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=23edbde7c ]
IMPALA-13637: Add ENABLE_TUPLE_ANALYSIS_IN_AGGREGATE option
IMPALA-13405 adds a new tuple-analysis algorithm in AggregationNode to
lower cardinality estimation when planning multi-column grouping. This
patch adds a query option ENABLE_TUPLE_ANALYSIS_IN_AGGREGATE that allows
users to enable/disable the algorithm if necessary. Default is True.
Testing:
- Add testAggregationNoTupleAnalysis.
This test is based on TpcdsPlannerTest#testQ19 but with
ENABLE_TUPLE_ANALYSIS_IN_AGGREGATE set to false.
Change-Id: Iabd8daa3d9414fc33d232643014042dc20530514
Reviewed-on: http://gerrit.cloudera.org:8080/22294
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Create a backend flag to control tuple-analysis in AggregationNode
> ------------------------------------------------------------------
>
> Key: IMPALA-13637
> URL: https://issues.apache.org/jira/browse/IMPALA-13637
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 4.5.0
> Reporter: Riza Suminto
> Assignee: Riza Suminto
> Priority: Major
> Fix For: Impala 4.5.0
>
>
> IMPALA-13405 adds a new tuple-analysis logic in AggregationNode to lower
> cardinality estimation when dealing with multi-column grouping. It is good to
> have control flag in case the old behavior is preferred.
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