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https://issues.apache.org/jira/browse/SPARK-46173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-46173.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 44110
[https://github.com/apache/spark/pull/44110]
> Skipping trimAll call in stringToDate functions to avoid needless string copy
> -----------------------------------------------------------------------------
>
> Key: SPARK-46173
> URL: https://issues.apache.org/jira/browse/SPARK-46173
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Aleksandar Tomic
> Assignee: Aleksandar Tomic
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> In StringToDate function call we currently first call trimAll to remove any
> whitespace and isocontrol characters. Trimming results in copying the input
> string which is not really needed given that we can do all the parsing in
> place by just skipping the whitespace/isocontrol chars.
> Given that we have customers complaining about speed of stringtodate
> function, especially when input string is long/potentially malformed proposal
> is to skip trimAll call and do parsing in place.
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