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Posted to notifications@asterixdb.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2017/11/28 21:34:00 UTC
[jira] [Commented] (ASTERIXDB-2174) Improve partitioning property
propagation in AbstractPreclusteredGroupByPOperator
[ https://issues.apache.org/jira/browse/ASTERIXDB-2174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16269494#comment-16269494 ]
ASF subversion and git services commented on ASTERIXDB-2174:
------------------------------------------------------------
Commit dc7e68a0212fd74147c8a77d1cf83a69a186ff57 in asterixdb's branch refs/heads/master from [~dlychagin-cb]
[ https://git-wip-us.apache.org/repos/asf?p=asterixdb.git;h=dc7e68a ]
[ASTERIXDB-2174][COMP] Improve partitioning propagation in GroupBy
- user model changes: no
- storage format changes: no
- interface changes: no
Details:
- Improve partitioning property computation in
AbstractPreclusteredGroupByPOperator
If "gby v1 as v2" and input partitioned on (v1)
then output is partitioned on (v2)
Change-Id: Ib679278d6ee6c53b1d9f581438e8bd04c56c2b08
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2176
Sonar-Qube: Jenkins <je...@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <je...@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <je...@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <je...@fulliautomatix.ics.uci.edu>
Reviewed-by: abdullah alamoudi <ba...@gmail.com>
> Improve partitioning property propagation in AbstractPreclusteredGroupByPOperator
> ---------------------------------------------------------------------------------
>
> Key: ASTERIXDB-2174
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2174
> Project: Apache AsterixDB
> Issue Type: Improvement
> Components: COMP - Compiler
> Reporter: Dmitry Lychagin
> Assignee: Dmitry Lychagin
> Priority: Minor
>
> Currently AbstractPreclusteredGroupByPOperator propagates its input partitioning property as is. For example if "gby var1 as var2" and input is partitioned on "var1" the output partitioning would also be reported on "var1". The problem is that "var1" is not visible after the group by. The variable in the output partitioning property should be changed from "var1" to "var2" because both these variables are bound to the same value and "var2" is visible after the group by.
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