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https://issues.apache.org/jira/browse/SPARK-60734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-60734:
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Parent: SPARK-60712
Issue Type: Sub-task (was: Improvement)
> Prune the columns that the scans of Data Source V2 streaming sources read
> -------------------------------------------------------------------------
>
> Key: SPARK-60734
> URL: https://issues.apache.org/jira/browse/SPARK-60734
> Project: Spark
> Issue Type: Sub-task
> Components: Structured Streaming
> Affects Versions: 4.4.0
> Reporter: Hyukjin Kwon
> Priority: Major
> Labels: pull-request-available
>
> The micro-batch and continuous executions push all the columns of the output
> of a Data Source V2 streaming source into its scan builder, so a streaming
> scan reads every column even when the query needs only some of them, unlike a
> batch scan of the same source. This makes them push only the top-level
> columns that the streaming query needs into the scan builders that support
> column pruning (SupportsPushDownRequiredColumns), behind the internal
> configuration spark.sql.streaming.v2ColumnPruning.enabled (true by default).
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