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From Jason Dere <jd...@hortonworks.com>
Subject Re: Review Request 56070: HIVE-15748
Date Tue, 31 Jan 2017 04:46:12 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/56070/#review163620
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ql/src/java/org/apache/hadoop/hive/ql/optimizer/ConvertJoinMapJoin.java (line 808)
<https://reviews.apache.org/r/56070/#comment235091>

    Can the parent be the result of a join in this case? If so there may be more than 1 TableScan
Operator coming back from this.


- Jason Dere


On Jan. 31, 2017, 12:44 a.m., Deepak Jaiswal wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/56070/
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> 
> (Updated Jan. 31, 2017, 12:44 a.m.)
> 
> 
> Review request for hive and Jason Dere.
> 
> 
> Bugs: HIVE-15748
>     https://issues.apache.org/jira/browse/HIVE-15748
> 
> 
> Repository: hive-git
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> 
> Description
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> Remove cycles due to Mapjoin and semijoin combo
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> 
> Diffs
> -----
> 
>   ql/src/java/org/apache/hadoop/hive/ql/optimizer/ConvertJoinMapJoin.java beed6b8 
>   ql/src/java/org/apache/hadoop/hive/ql/parse/GenTezUtils.java 6141391 
>   ql/src/test/queries/clientpositive/dynamic_semijoin_reduction.q 13797c0 
>   ql/src/test/results/clientpositive/llap/dynamic_semijoin_reduction.q.out e89526e 
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> Diff: https://reviews.apache.org/r/56070/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Deepak Jaiswal
> 
>


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