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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-6624) Convert filters into CNF for data sources
Date Fri, 14 Aug 2015 13:29:45 GMT

    [ https://issues.apache.org/jira/browse/SPARK-6624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14696988#comment-14696988
] 

Apache Spark commented on SPARK-6624:
-------------------------------------

User 'yjshen' has created a pull request for this issue:
https://github.com/apache/spark/pull/8193

> Convert filters into CNF for data sources
> -----------------------------------------
>
>                 Key: SPARK-6624
>                 URL: https://issues.apache.org/jira/browse/SPARK-6624
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Reynold Xin
>            Assignee: Yijie Shen
>
> We should turn filters into conjunctive normal form (CNF) before we pass them to data
sources. Otherwise, filters are not very useful if there is a single filter with a bunch of
ORs.
> Note that we already try to do some of these in BooleanSimplification, but I think we
should just formalize it to use CNF.



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