Cheng Su created SPARK-32985:
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Summary: 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
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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