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https://reviews.apache.org/r/54042/
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Review request for hive.


Bugs: HIVE-15114
    https://issues.apache.org/jira/browse/HIVE-15114


Repository: hive-git


Description
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This patch removes an extra MoveTask from the CONDITIONAL TASK added to the 
query plan. It would be used only as a Blobstorage optimization. 
In HDFS, this two tasks are just simple atomic renames, but on Blobstorage, a 
rename is too expensive.


Diffs (updated)
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itests/hive-blobstore/src/test/queries/clientpositive/conditional_task_optimization.q
 PRE-CREATION 
  
itests/hive-blobstore/src/test/results/clientpositive/conditional_task_optimization.q.out
 PRE-CREATION 
  itests/hive-blobstore/src/test/results/clientpositive/insert_into.q.out 
00ad136ae40a5ed2689ad8ed2f882bbcd238324d 
  ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMapRedUtils.java 
88d5afadd690c3dce276b72a37608d30ddeea271 
  
ql/src/test/org/apache/hadoop/hive/ql/optimizer/TestGenMapRedUtilsCreateConditionalTask.java
 PRE-CREATION 

Diff: https://reviews.apache.org/r/54042/diff/


Testing (updated)
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# Testa added
mvn test -Dtest=TestBlobstoreCliDriver -Dqfile=conditional_task_optimization.q

# All tests
mvn test -Dtest=TestBlobstoreCliDriver
mvn test -Dtest=TestBlobstoreNegativeCliDriver


Thanks,

Sergio Pena

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