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https://issues.apache.org/jira/browse/HIVE-24365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich updated HIVE-24365:
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Parent: HIVE-24384
Issue Type: Sub-task (was: Improvement)
> 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: Sub-task
> 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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