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https://issues.apache.org/jira/browse/IMPALA-10961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17497060#comment-17497060
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ASF subversion and git services commented on IMPALA-10961:
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Commit 7cfc73c2fd94335d7a19b6767b016f62ec4bde84 in impala's branch
refs/heads/master from Csaba Ringhofer
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=7cfc73c ]
IMPALA-11150: Remove resource-requirements tests on functional_parquet.alltypes
These test became flaky after IMPALA-10961 as it led to smaller and
varying size for the table. This is a short term solution to make
builds green as fixing the tests properly may take some time.
Change-Id: I5bf0f963d3e053345aec27e834974eeead4190ac
Reviewed-on: http://gerrit.cloudera.org:8080/18267
Reviewed-by: Fang-Yu Rao <[email protected]>
Reviewed-by: Csaba Ringhofer <[email protected]>
Tested-by: Csaba Ringhofer <[email protected]>
> Implement 3-way quicksort in sorter
> -----------------------------------
>
> Key: IMPALA-10961
> URL: https://issues.apache.org/jira/browse/IMPALA-10961
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Csaba Ringhofer
> Assignee: Noemi Pap-Takacs
> Priority: Major
> Labels: performance
> Attachments: checksorted.patch, qsort.cc
>
>
> Using 3-way partitioning in quicksort could massively speed up sorting if
> there is a large number of duplicate elements. This is very common in sorts
> before partitioned inserts.
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