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https://issues.apache.org/jira/browse/SPARK-48622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kent Yao resolved SPARK-48622.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 46979
[https://github.com/apache/spark/pull/46979]
> 50% cpu time spent on SQLConf.getConf in ALTER ADD COLUMN query
> ---------------------------------------------------------------
>
> Key: SPARK-48622
> URL: https://issues.apache.org/jira/browse/SPARK-48622
> Project: Spark
> Issue Type: Bug
> Components: Optimizer
> Affects Versions: 3.5.1
> Reporter: Andrew Xue
> Assignee: Andrew Xue
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: Screenshot 2024-06-13 at 12.51.16 PM.png
>
>
> SQLConf.caseSensitiveAnalsysis is evaluated for all (existing and added)
> columns in an ALTER ADD COLUMN query. For a query on a table with 10k columns
> and adding 1 new column, 50% of cpu time is spent in SQLConf.getConf (profile
> in attachments)
>
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