[jira] [Commented] (PHOENIX-6752) Duplicate expression nodes in extract nodes during WHERE compilation phase leads to poor performance.

["Tanuj Khurana (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PHOENIX-6752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17630684#comment-17630684 ] 

Tanuj Khurana commented on PHOENIX-6752:
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[~jisaac] Do we need this for 5.1.3 release ?

> Duplicate expression nodes in extract nodes during WHERE compilation phase leads to poor performance.
> -----------------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-6752
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-6752
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.15.0, 5.1.0, 4.16.1, 5.2.0
>            Reporter: Jacob Isaac
>            Assignee: Jacob Isaac
>            Priority: Critical
>             Fix For: 5.2.0
>
>         Attachments: test-case.txt
>
>
> SQL queries using the OR operator were taking a long time during the WHERE clause compilation phase when a large number of OR clauses (~50k) are used.
> The key observation was that during the AND/OR processing, when there are a large number of OR expression nodes the same set of extracted nodes was getting added.
> Thus bloating the set size and slowing down the processing.
> [code|https://github.com/apache/phoenix/blob/0c2008ddf32566c525df26cb94d60be32acc10da/phoenix-core/src/main/java/org/apache/phoenix/compile/WhereOptimizer.java#L930]



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