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https://issues.apache.org/jira/browse/SPARK-12850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16543988#comment-16543988
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Hyukjin Kwon commented on SPARK-12850:
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Fixed in https://github.com/apache/spark/pull/20915 at SPARK-23803
See also https://github.com/apache/spark/pull/20915#issuecomment-404768901 and
https://github.com/apache/spark/pull/10942#issuecomment-263185422
> Support bucket pruning (predicate pushdown for bucketed tables)
> ---------------------------------------------------------------
>
> Key: SPARK-12850
> URL: https://issues.apache.org/jira/browse/SPARK-12850
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Xiao Li
> Priority: Major
> Fix For: 2.4.0
>
>
> We now support bucketing. One optimization opportunity is to push some
> predicates into the scan to skip scanning files that definitely won't match
> the values.
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