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https://issues.apache.org/jira/browse/HIVE-8625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186284#comment-14186284
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Hive QA commented on HIVE-8625:
-------------------------------
{color:red}Overall{color}: -1 at least one tests failed
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12677501/HIVE-8625.patch
{color:red}ERROR:{color} -1 due to 7 failed/errored test(s), 6578 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_union29
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_union30
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_union34
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_union_remove_10
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver_union_remove_11
org.apache.hadoop.hive.cli.TestMiniTezCliDriver.testCliDriver_optimize_nullscan
org.apache.hive.minikdc.TestJdbcWithMiniKdc.testNegativeTokenAuth
{noformat}
Test results:
http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1489/testReport
Console output:
http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1489/console
Test logs:
http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-1489/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
Tests exited with: TestsFailedException: 7 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12677501 - PreCommit-HIVE-TRUNK-Build
> Some union queries result in plans with many unions with CBO on
> ---------------------------------------------------------------
>
> Key: HIVE-8625
> URL: https://issues.apache.org/jira/browse/HIVE-8625
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 0.14.0, 0.15.0
> Reporter: Jesús Camacho Rodríguez
> Priority: Minor
> Attachments: HIVE-8625.patch
>
>
> For some queries e.g. union9, union16, we are getting plans with many binary
> unions when CBO is on. The reason is that an identity select operator is
> introduced after each union by the CBO; thus, the method that was merging the
> unions when the translation of the AST into a logical plan was being done is
> not executed, as it does not detect there is another union operator.
> With the fix in the patch attached, the method will merge the two unions if
> (1) one is the child of the other one, or (2) if one is a descendant of the
> other one and there is an identity select operator between them.
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