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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/12/23 10:40:46 UTC

[jira] [Commented] (SPARK-6624) Convert filters into CNF for data sources

    [ https://issues.apache.org/jira/browse/SPARK-6624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15069434#comment-15069434 ] 

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

User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/10444

> 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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