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https://issues.apache.org/jira/browse/SPARK-11661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15080605#comment-15080605
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Yin Huai commented on SPARK-11661:
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Can you create a jira? Do you also want to create a PR to fix it
(DataSourceStrategy is the file that needs to updated)?
> We should still pushdown filters returned by a data source's unhandledFilters
> -----------------------------------------------------------------------------
>
> Key: SPARK-11661
> URL: https://issues.apache.org/jira/browse/SPARK-11661
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Yin Huai
> Assignee: Yin Huai
> Priority: Blocker
> Fix For: 1.6.0
>
>
> We added unhandledFilters interface to SPARK-10978. So, a data source has a
> chance to let Spark SQL know that for those returned filters, it is possible
> that the data source will not apply them to every row. So, Spark SQL should
> use a Filter operator to evaluate those filters. However, if a filter is a
> part of returned unhandledFilters, we should still push it down. For example,
> our internal data sources do not override this method, if we do not push down
> those filters, we are actually turning off the filter pushdown feature.
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