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https://issues.apache.org/jira/browse/SPARK-17091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Duffy resolved SPARK-17091.
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Resolution: Won't Fix
Should've closed this last year, but at the time based on Hyukjin Kwon's
profiling, evaluating the disjunction at the Spark level was determined to
yield better performance.
> ParquetFilters rewrite IN to OR of Eq
> -------------------------------------
>
> Key: SPARK-17091
> URL: https://issues.apache.org/jira/browse/SPARK-17091
> Project: Spark
> Issue Type: Bug
> Reporter: Andrew Duffy
>
> 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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