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Posted to issues-all@impala.apache.org by "Riza Suminto (Jira)" <ji...@apache.org> on 2023/11/09 20:29:00 UTC

[jira] [Resolved] (IMPALA-12548) Clarify the meaning of AGG_MEM_CORRELATION_FACTOR

     [ https://issues.apache.org/jira/browse/IMPALA-12548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Riza Suminto resolved IMPALA-12548.
-----------------------------------
    Resolution: Fixed

> Clarify the meaning of AGG_MEM_CORRELATION_FACTOR
> -------------------------------------------------
>
>                 Key: IMPALA-12548
>                 URL: https://issues.apache.org/jira/browse/IMPALA-12548
>             Project: IMPALA
>          Issue Type: Bug
>    Affects Versions: Impala 4.3.0
>            Reporter: Riza Suminto
>            Assignee: Riza Suminto
>            Priority: Major
>             Fix For: Impala 4.4.0
>
>
> AGG_MEM_CORRELATION_FACTOR has valid value between 0.0 to 1.0. This query option name can be misinterpreted as high value means highly correlated columns, but it is actually the opposite in the code implementation. 1.0 is interpreted as no correlation at all in the code, while <1.0 means somewhat correlated. Documentation should be clarified about this.



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