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https://issues.apache.org/jira/browse/SPARK-11621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14998089#comment-14998089
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Hyukjin Kwon commented on SPARK-11621:
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Ops, I guess [~lian cheng] he must be working on this since any filters are not
pushed down for now. However, I think anyway we need to take the cases for
partially handled filters into account. Please close this if you are working on
this.
> ORC filter pushdown not working properly after new unhandled filter interface.
> ------------------------------------------------------------------------------
>
> Key: SPARK-11621
> URL: https://issues.apache.org/jira/browse/SPARK-11621
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Hyukjin Kwon
>
> After the new interface to get rid of filters predicate-push-downed which are
> already processed in datasource-level
> (https://github.com/apache/spark/pull/9399), it dose not push down filters
> for ORC.
> This is because at {{DataSourceStrategy}}, all the filters are treated as
> unhandled filters.
> Also, since ORC does not support to filter fully record by record but instead
> rough results came out, the filters for ORC should not go to unhandled
> filters.
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