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Posted to issues@spark.apache.org by "Cheng Su (Jira)" <ji...@apache.org> on 2020/09/24 07:05:00 UTC

[jira] [Created] (SPARK-32985) Decouple bucket filter pruning and bucket table scan

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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