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Posted to issues-all@impala.apache.org by "Aman Sinha (Jira)" <ji...@apache.org> on 2021/06/10 15:56:00 UTC

[jira] [Commented] (IMPALA-10677) Set selectivity of "!="

    [ https://issues.apache.org/jira/browse/IMPALA-10677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361044#comment-17361044 ] 

Aman Sinha commented on IMPALA-10677:
-------------------------------------

[~liuyao] This is a duplicate of IMPALA-7560 (original) and IMPALA-8039 (duplicate).  There's more analysis in those JIRAs about the selectivity computation so it would be good to close this one as a dup and assign IMPALA-7560 to yourself.  What do you think ?

> Set selectivity of "!="
> -----------------------
>
>                 Key: IMPALA-10677
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10677
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Frontend
>    Affects Versions: Impala 3.4.0
>            Reporter: liuyao
>            Assignee: liuyao
>            Priority: Major
>             Fix For: Impala 4.0
>
>
> The selectivity of "!=" is not set. 
> For example, "SELECT * FROM Cola! = 1"
> The selectivity of "! = " is -1



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