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https://issues.apache.org/jira/browse/HIVE-2642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174329#comment-13174329
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Hudson commented on HIVE-2642:
------------------------------
Integrated in Hive-trunk-h0.23.0 #42 (See
[https://builds.apache.org/job/Hive-trunk-h0.23.0/42/])
HIVE-2642 fix Hive-2566 and make union optimization more aggressive
(Yongqiang He via namit)
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1221812
Files :
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRFileSink1.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRProcContext.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRRedSink3.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRTableScan1.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRUnion1.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMapRedUtils.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/unionproc/UnionProcContext.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/unionproc/UnionProcFactory.java
* /hive/trunk/ql/src/test/queries/clientpositive/union26.q
* /hive/trunk/ql/src/test/results/clientpositive/auto_join27.q.out
* /hive/trunk/ql/src/test/results/clientpositive/input25.q.out
* /hive/trunk/ql/src/test/results/clientpositive/input26.q.out
* /hive/trunk/ql/src/test/results/clientpositive/join35.q.out
* /hive/trunk/ql/src/test/results/clientpositive/lineage1.q.out
* /hive/trunk/ql/src/test/results/clientpositive/load_dyn_part14.q.out
* /hive/trunk/ql/src/test/results/clientpositive/merge4.q.out
* /hive/trunk/ql/src/test/results/clientpositive/ppd_union_view.q.out
* /hive/trunk/ql/src/test/results/clientpositive/ql_rewrite_gbtoidx.q.out
* /hive/trunk/ql/src/test/results/clientpositive/stats1.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union10.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union11.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union12.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union14.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union15.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union17.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union18.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union19.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union20.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union22.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union24.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union25.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union26.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union3.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union4.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union5.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union6.q.out
* /hive/trunk/ql/src/test/results/clientpositive/union7.q.out
> fix Hive-2566 and make union optimization more aggressive
> ----------------------------------------------------------
>
> Key: HIVE-2642
> URL: https://issues.apache.org/jira/browse/HIVE-2642
> Project: Hive
> Issue Type: Improvement
> Reporter: He Yongqiang
> Assignee: He Yongqiang
> Attachments: HIVE-2642.D735.1.patch
>
>
> Hive-2566 did some optimizations to union, but cause some problems. And then
> got reverted. This is to get it back and fix the problems we saw, and also
> make union optimization more aggressive.
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