[GitHub] [spark] MaxGekk opened a new pull request #24181: [SPARK-27242][SQL] Make formatting TIMESTAMP/DATE literals independent from the default time zone

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MaxGekk opened a new pull request #24181: [SPARK-27242][SQL] Make formatting TIMESTAMP/DATE literals independent from the default time zone
URL: https://github.com/apache/spark/pull/24181
 
 
   ## What changes were proposed in this pull request?
   
   In the PR, I propose to use the SQL config `spark.sql.session.timeZone` in formatting `TIMESTAMP` literals, and make formatting `DATE` literals independent from time zone. The changes make parsing and formatting `TIMESTAMP`/`DATE` literals consistent, and independent from the default time zone of current JVM.
   
   Also this PR ports `TIMESTAMP`/`DATE` literals formatting on Proleptic Gregorian Calendar via using `TimestampFormatter`/`DateFormatter`.  
   
   ## How was this patch tested?
   
   Added new tests to `LiteralExpressionSuite`

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