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https://issues.apache.org/jira/browse/IMPALA-14102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18019009#comment-18019009
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ASF subversion and git services commented on IMPALA-14102:
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Commit 8b057881c70338abe2bf29b51b04b14e88e06f97 in impala's branch
refs/heads/master from Steve Carlin
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=8b057881c ]
IMPALA-14102: [part 2] Fixed the JoinTranspose rule.
This fix is needed before the join optimization fix can be committed.
The JoinTranspose rule provided by Calcite was having 2 issues:
1) For tpcds-q10 and q35, an exception was being thrown. There is
a bug in the Calcite code when the Join-Project gets matched but
the Join is of reltype SemiJoin. In this case, the Projects do not
get created correctly and the exception gets thrown.
2) We only want to transpose a Project above a Join if there is an
underlying Join underneath the Project. The whole purpose is to
be able to create adjacent Join RelNodes. We do not have to transpose
the Project when it is not sandwiched between two Join nodes. It is
preferable to keep it underneath the Join since the row width
calculation would be affected (the Project may reduce the number of
columns, thus reducing the row width).
This commit extends the given JoinProjectTranspose rule by Calcite
and handles these added restrictions.
Change-Id: I7f62ec030fc8fbe36e6150bf96c9673c44b7da1b
Reviewed-on: http://gerrit.cloudera.org:8080/23313
Reviewed-by: Aman Sinha <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Calcite planner: Customize LoptOptimizeJoinRule
> -----------------------------------------------
>
> Key: IMPALA-14102
> URL: https://issues.apache.org/jira/browse/IMPALA-14102
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Steve Carlin
> Assignee: Steve Carlin
> Priority: Major
>
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