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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Work started] (HIVE-13815) Improve logic to infer false predicates
Date Thu, 21 Jul 2016 19:48:20 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13815?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Work on HIVE-13815 started by Jesus Camacho Rodriguez.
------------------------------------------------------
> Improve logic to infer false predicates
> ---------------------------------------
>
>                 Key: HIVE-13815
>                 URL: https://issues.apache.org/jira/browse/HIVE-13815
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>    Affects Versions: 2.1.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-13815.patch
>
>
> Follow-up/extension of the work done in HIVE-13068.
> Ex.
> ql/src/test/results/clientpositive/annotate_stats_filter.q.out
> {{predicate: ((year = 2001) and (state = 'OH') and (state = 'FL')) (type: boolean)}}
-> {{false}}
> ql/src/test/results/clientpositive/cbo_rp_join1.q.out
> {{predicate: ((_col0 = _col1) and (_col1 = 40) and (_col0 = 40)) (type: boolean)}} ->
{{predicate: ((_col1 = 40) and (_col0 = 40)) (type: boolean)}}
> ql/src/test/results/clientpositive/constprog_semijoin.q.out 
> {{predicate: (((id = 100) = true) and (id <> 100)) (type: boolean)}} -> {{false}}



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