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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-20432) Rewrite BETWEEN to IN for integer types for stats estimation
Date Tue, 04 Sep 2018 22:26:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-20432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16603672#comment-16603672
] 

Hive QA commented on HIVE-20432:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12937698/HIVE-20432.3.patch

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

{color:green}SUCCESS:{color} +1 due to 14924 tests passed

Test results: https://builds.apache.org/job/PreCommit-HIVE-Build/13589/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/13589/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-13589/

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
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12937698 - PreCommit-HIVE-Build

> Rewrite BETWEEN to IN for integer types for stats estimation
> ------------------------------------------------------------
>
>                 Key: HIVE-20432
>                 URL: https://issues.apache.org/jira/browse/HIVE-20432
>             Project: Hive
>          Issue Type: Improvement
>    Affects Versions: 4.0.0
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>         Attachments: HIVE-20432.1.patch, HIVE-20432.2.patch, HIVE-20432.3.patch
>
>
> IN clause provides better statistics estimation since predicates are equality based and
it keeps into account selectivity of all values. BETWEEN is rewritten into {{>= AND <=}}
i.e. non-equality predicates which cause worse estimation. For integer types BETWEEN could
be rewritten into IN e.g. BETWEEN 4 and 7 is equivalent to IN (4,5,6,7).



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