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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16797) Enhance HiveFilterSetOpTransposeRule to remove union branches
Date Fri, 02 Jun 2017 03:49:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16034092#comment-16034092
] 

Hive QA commented on HIVE-16797:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12870871/HIVE-16797.01.patch

{color:red}ERROR:{color} -1 due to no test(s) being added or modified.

{color:red}ERROR:{color} -1 due to 3 failed/errored test(s), 10813 tests executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[unionall_unbalancedppd] (batchId=2)
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver[columnstats_part_coltype]
(batchId=157)
org.apache.hadoop.hive.cli.TestPerfCliDriver.testCliDriver[query14] (batchId=232)
{noformat}

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/5506/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/5506/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-5506/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
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: 3 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12870871 - PreCommit-HIVE-Build

> Enhance HiveFilterSetOpTransposeRule to remove union branches
> -------------------------------------------------------------
>
>                 Key: HIVE-16797
>                 URL: https://issues.apache.org/jira/browse/HIVE-16797
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-16797.01.patch
>
>
> in query4.q, we can see that it creates a CTE with union all of 3 branches. Then it is
going to do a 3 way self-join of the CTE with predicates. The predicates actually specifies
only one of the branch in CTE to participate in the join. Thus, in some cases, e.g.,
> {code}
>                /- filter(false) -----TS0 
> union all  - filter(false) -----TS1
>                \-----TS2
> {code}
> we can cut the branches of TS0 and TS1. The union becomes only TS2.



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