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https://issues.apache.org/jira/browse/SPARK-41220?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-41220:
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Assignee: Apache Spark
> Range partitioner sample supports column pruning
> ------------------------------------------------
>
> Key: SPARK-41220
> URL: https://issues.apache.org/jira/browse/SPARK-41220
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: XiDuo You
> Assignee: Apache Spark
> Priority: Major
>
> When do a global sort, firstly we do sample to get range bounds, then we use
> the range partitioner to do shuffle exchange.
> The issue is, the sample plan is coupled with the shuffle plan that causes we
> can not optimize the sample plan. What we need for sample plan is the columns
> for sort order but the shuffle plan contains all data columns.So at least, we
> can do column pruning for the sample plan to only fetch the ordering columns.
> A common example is: `OPTIMIZE table ZORDER BY columns`
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