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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2016/01/12 23:07:39 UTC

[jira] [Commented] (CALCITE-996) Predicate should be simplified when we create a Filter operator

    [ https://issues.apache.org/jira/browse/CALCITE-996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15095062#comment-15095062 ] 

Julian Hyde commented on CALCITE-996:
-------------------------------------

Revised fix http://git-wip-us.apache.org/repos/asf/calcite/commit/a67b4a97.

> Predicate should be simplified when we create a Filter operator
> ---------------------------------------------------------------
>
>                 Key: CALCITE-996
>                 URL: https://issues.apache.org/jira/browse/CALCITE-996
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.5.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Minor
>             Fix For: 1.6.0
>
>
> When we create a Filter operator, there is a chance we end up with duplicate predicate factors (for instance, this has been seen in Hive when we use FilterMergeRule). It seems appropriate to simplify the predicate to eliminate those factors before we create the filter.



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