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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11573) PointLookupOptimizer can be pessimistic at a low nDV
Date Thu, 27 Aug 2015 01:17:47 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11573?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14715870#comment-14715870
] 

Hive QA commented on HIVE-11573:
--------------------------------



{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/12752557/HIVE-11573.6.patch

{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 9379 tests executed
*Failed tests:*
{noformat}
org.apache.hive.hcatalog.api.TestHCatClient.testTableSchemaPropagation
{noformat}

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/5081/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/5081/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-5081/

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: 1 tests failed
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12752557 - PreCommit-HIVE-TRUNK-Build

> PointLookupOptimizer can be pessimistic at a low nDV
> ----------------------------------------------------
>
>                 Key: HIVE-11573
>                 URL: https://issues.apache.org/jira/browse/HIVE-11573
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.3.0, 2.0.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>              Labels: TODOC2.0
>             Fix For: 1.3.0, 2.0.0
>
>         Attachments: HIVE-11573.1.patch, HIVE-11573.2.patch, HIVE-11573.3.patch, HIVE-11573.4.patch,
HIVE-11573.5.patch, HIVE-11573.6.patch
>
>
> The PointLookupOptimizer can turn off some of the optimizations due to its use of tuple
IN() clauses.
> Limit the application of the optimizer for very low nDV cases and extract the sub-clause
as a pre-condition during runtime, to trigger the simple column predicate index lookups.



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