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From "Michael Styles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-17091) Convert IN predicate to equivalent Parquet filter
Date Wed, 28 Jun 2017 11:36:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-17091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16066363#comment-16066363
] 

Michael Styles commented on SPARK-17091:
----------------------------------------

n Parquet 1.7, there as a bug involving corrupt statistics on binary columns (https://issues.apache.org/jira/browse/PARQUET-251).
This bug prevented earlier versions of Spark from generating Parquet filters on any string
columns. Spark 2.1 has moved up to Parquet 1.8.2, so this issue no longer exists.

> Convert IN predicate to equivalent Parquet filter
> -------------------------------------------------
>
>                 Key: SPARK-17091
>                 URL: https://issues.apache.org/jira/browse/SPARK-17091
>             Project: Spark
>          Issue Type: Bug
>            Reporter: Andrew Duffy
>         Attachments: IN Predicate.png, OR Predicate.png
>
>
> Past attempts at pushing down the InSet operation for Parquet relied on user-defined
predicates. It would be simpler to rewrite an IN clause into the corresponding OR union of
a set of equality conditions.



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