[
https://issues.apache.org/jira/browse/HIVE-16298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941671#comment-15941671
]
Hive QA commented on HIVE-16298:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12860502/HIVE-16298.1.patch
{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 1 failed/errored test(s), 10512 tests
executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[comments] (batchId=35)
{noformat}
Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/4359/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/4359/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-4359/
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: 1 tests failed
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12860502 - PreCommit-HIVE-Build
> Add config to specify multi-column joins have correlated columns
> ----------------------------------------------------------------
>
> Key: HIVE-16298
> URL: https://issues.apache.org/jira/browse/HIVE-16298
> Project: Hive
> Issue Type: Bug
> Reporter: Jason Dere
> Assignee: Jason Dere
> Attachments: HIVE-16298.1.patch
>
>
> The default row estimation for multi-key joins divides the row estimate by
> the product of the NDVs for each join column, which can cause the row
> estimate to be low. Try adding a config to assume the columns are correlated,
> where we only divide the row estimate by the largest NDV.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
