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https://issues.apache.org/jira/browse/HIVE-21152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16774477#comment-16774477
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Hive QA commented on HIVE-21152:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12959629/HIVE-21152.03.patch
{color:green}SUCCESS:{color} +1 due to 1 test(s) being added or modified.
{color:red}ERROR:{color} -1 due to 3 failed/errored test(s), 15809 tests
executed
*Failed tests:*
{noformat}
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[explode_null]
(batchId=29)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[parquet_write_correct_definition_levels]
(batchId=44)
org.apache.hadoop.hive.cli.TestCliDriver.testCliDriver[udf6] (batchId=57)
{noformat}
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/16184/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/16184/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-16184/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
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: 12959629 - PreCommit-HIVE-Build
> Rewrite if expression to case and recognize simple case as an if
> ----------------------------------------------------------------
>
> Key: HIVE-21152
> URL: https://issues.apache.org/jira/browse/HIVE-21152
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Attachments: HIVE-21152.01.patch, HIVE-21152.02.patch,
> HIVE-21152.03.patch
>
>
> * {{IF}} is not part of the sql standard; however given its special form its
> simpler - and currently in Hive it also has vectorized support
> * people writing standard sql may write: {{CASE WHEN member=1 THEN attr+1
> else attr+2 END}} which is essentially an if.
> The idea is to rewrite IFs to CASEs for the cbo; and recognize simple
> "CASE"-s as IFs to get vectorization on them if possible
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