[jira] [Resolved] (HIVE-24365) SWO should not create complex and redundant filter expressions

["Zoltan Haindrich (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltan Haindrich resolved HIVE-24365.
-------------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

merged into master. Thank you Jesus for reviewing the changes!

> SWO should not create complex and redundant filter expressions
> --------------------------------------------------------------
>
>                 Key: HIVE-24365
>                 URL: https://issues.apache.org/jira/browse/HIVE-24365
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> for q88 we have complex and mostly unreadable filter expressions; because before merging 2 branches the TS filterexpression is pushed into a FIL operator.
> consider 3 scans with filters: (A,B,C)
> initially we have
> {code} 
> T(A)
> T(B)
> T(C)
> {code}
> after merging A,B
> {code}
> T(A || B) -> FIL(A)
>           -> FIL(B)
> T(C)
> {code}
> right now if we merge C as well:
> {code}
> T(A || B || C) -> FIL(A AND (A || B))
>                -> FIL(B AND (A || B))
>                -> FIL(C)
> {code}



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