[SPARK-46070] Precompile regex patterns in SparkDateTimeUtils.getZoneId

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.5.0
• Fix Version/s: 4.0.0
• Component/s: SQL
• Labels: pull-request-available
• Assignee: Tanel Kiis
• Reporter: Tanel Kiis
• Created: 23/Nov/23 10:03
• Updated: 23/Nov/23 15:30
• Resolved: 23/Nov/23 15:30

Description

SparkDateTimeUtils.getZoneId uses String.replaceFirst method, that internally does a Pattern.compile(regex). This method is called once for each dataset row when using functions like from_utc_timestamp.

Issue Links

• links to: GitHub Pull Request #43976