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https://issues.apache.org/jira/browse/IMPALA-15385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18118852#comment-18118852
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ASF subversion and git services commented on IMPALA-15385:
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Commit a01435f32bbf90ef44a1a4fed4d4dbc46c1325c3 in impala's branch
refs/heads/master from Xuebin Su
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=a01435f32 ]
IMPALA-15385: Make AVG_COLLECTION_SIZE a query option
AVG_COLLECTION_SIZE affects the cardinalty estimation of some plan
nodes, which in turn affects the memory estimation.
This patch changes AVG_COLLECTION_SIZE from a hard-coded constant to
a query option so that user can set it for each query.
Testing:
- Added a new PlannerTest.
Change-Id: I518f76b38ba926e6ece196f6e90c60f1fa15b5ff
Reviewed-on: http://gerrit.cloudera.org:8080/24902
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> AVG_COLLECTION_SIZE is hard-coded
> ---------------------------------
>
> Key: IMPALA-15385
> URL: https://issues.apache.org/jira/browse/IMPALA-15385
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Xuebin Su
> Assignee: Xuebin Su
> Priority: Critical
>
> As a result, it cannot be changed when planning the query.
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