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https://issues.apache.org/jira/browse/SPARK-27212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-27212:
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Assignee: (was: Apache Spark)
> Eliminate TimeZone to ZoneId conversion in stringToTimestamp
> ------------------------------------------------------------
>
> Key: SPARK-27212
> URL: https://issues.apache.org/jira/browse/SPARK-27212
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Maxim Gekk
> Priority: Minor
>
> The stringToTimestamp method of DateTimeUtils (and stringToDate as well) can
> be called per each row. And the method converts TimeZone to ZoneId each time.
> The operation is relatively expensive because it does intermediate conversion
> to a string:
> http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/f940e7a48b72/src/share/classes/java/util/TimeZone.java#l547
> The conversion is unnecessary, and could be avoid. The ticket aims to replace
> signature of stringToTimestamp to require ZoneId as a parameter.
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