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https://issues.apache.org/jira/browse/SPARK-26390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16723773#comment-16723773
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ASF GitHub Bot commented on SPARK-26390:
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cloud-fan opened a new pull request #23343: [SPARK-26390][SQL] ColumnPruning
rule should only do column pruning
URL: https://github.com/apache/spark/pull/23343
## What changes were proposed in this pull request?
This is a small clean up.
By design catalyst rules should be orthogonal: each rule should have its own
responsibility. However, the `ColumnPruning` rule does not only do column
pruning, but also remove no-op project and window.
This PR updates the `RemoveRedundantProject` rule to remove no-op window as
well, and clean up the `ColumnPruning` rule to only do column pruning.
## How was this patch tested?
existing tests
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> ColumnPruning rule should only do column pruning
> ------------------------------------------------
>
> Key: SPARK-26390
> URL: https://issues.apache.org/jira/browse/SPARK-26390
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Wenchen Fan
> Assignee: Wenchen Fan
> Priority: Major
>
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