[jira] [Assigned] (PHOENIX-6751) Force using range scan vs skip scan when using the IN operator and large number of RVC elements

["Jacob Isaac (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-6751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacob Isaac reassigned PHOENIX-6751:
------------------------------------

    Assignee: Jacob Isaac

> Force using range scan vs skip scan when using the IN operator and large number of RVC elements 
> ------------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-6751
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-6751
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.15.0, 5.1.1, 4.16.0, 5.2.0
>            Reporter: Jacob Isaac
>            Assignee: Jacob Isaac
>            Priority: Critical
>             Fix For: 5.2.0, 5.1.3
>
>
> SQL queries using the IN operator using PKs of different SortOrder were failing during the WHERE clause compilation phase and causing OOM issues on the servers when a large number (~50k) of RVC elements were used in the IN operator.
> SQL queries were failing specifically during the skip scan filter generation. The skip scan filter is generated using a list of point key ranges. [ScanRanges.create|https://git.soma.salesforce.com/bigdata-packaging/phoenix/blob/e0737e0ea7ba7501e78fe23c16e7abca27bfd944/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java#L80]
> The following getPointKeys [code|https://git.soma.salesforce.com/bigdata-packaging/phoenix/blob/e0737e0ea7ba7501e78fe23c16e7abca27bfd944/phoenix-core/src/main/java/org/apache/phoenix/compile/ScanRanges.java#L541] uses the KeyRange sets to create a new list of point-keys. When there are a large number of RVC elements the above



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