zhengruifeng commented on code in PR #52980:
URL: https://github.com/apache/spark/pull/52980#discussion_r2525897921


##########
core/src/main/scala/org/apache/spark/api/python/PythonRunner.scala:
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@@ -196,6 +196,7 @@ private[spark] abstract class BasePythonRunner[IN, OUT](
     conf.get(PYTHON_WORKER_TRACEBACK_DUMP_INTERVAL_SECONDS)
   protected val hideTraceback: Boolean = false
   protected val simplifiedTraceback: Boolean = false
+  protected val sessionLocalTimeZone = 
conf.getOption("spark.sql.session.timeZone")

Review Comment:
   > so it's not available here unless it's specified when the session is 
created?
   
   it seems SESSION_LOCAL_TIMEZONE has a default value depending on driver's 
timezone
   
   
https://github.com/apache/spark/blob/daa29f6ede29f8a705c2c757b66a3471b80bb1ec/sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala#L3691-L3700
   
   +1 to add new tests with different timezone, you may refer to 
https://github.com/apache/spark/blob/3d87de318b62703785a07845899a0d30e32dfd29/python/pyspark/sql/tests/arrow/test_arrow_udf.py#L103-L113



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