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https://issues.apache.org/jira/browse/SPARK-32985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276083#comment-17276083
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Apache Spark commented on SPARK-32985:
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User 'c21' has created a pull request for this issue:
https://github.com/apache/spark/pull/31413
> Decouple bucket filter pruning and bucket table scan
> ----------------------------------------------------
>
> Key: SPARK-32985
> URL: https://issues.apache.org/jira/browse/SPARK-32985
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Cheng Su
> Priority: Minor
>
> As a followup from discussion in
> [https://github.com/apache/spark/pull/29804#discussion_r493100510] .
> Currently in data source v1 file scan `FileSourceScanExec`, bucket filter
> pruning will only take effect with bucket table scan -
> [https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/DataSourceScanExec.scala#L542]
> . However this is unnecessary, as bucket filter pruning can also happen if
> we disable bucketed table scan. This help query leverage the benefit from
> bucket filter pruning to save CPU/IO to not read unnecessary bucket files,
> and do not bound by bucket table scan when the parallelism of tasks is a
> concern.
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