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https://issues.apache.org/jira/browse/SPARK-29074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-29074:
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Assignee: Maxim Gekk
> Optimize `date_format` for foldable `fmt`
> -----------------------------------------
>
> Key: SPARK-29074
> URL: https://issues.apache.org/jira/browse/SPARK-29074
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Minor
>
> The DateFormatClass
> ([https://github.com/apache/spark/blob/67b4329fb08fd606461aa1ac9274c4a84d15d70e/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala#L583])
> could create the TimestampFormatter only once at the initialization, and
> reuse it in nullSafeEval() and in doGenCode().
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