Github user ueshin commented on the issue:
https://github.com/apache/spark/pull/16781
@squito I'm sorry for late reply.
I was reviewing this pr again and current Hive behavior deeply.
It seems the both behaviors are the same when the table property exists,
but this is a little complicated, so I want to confirm if the following
behavior is correct or not by the simple example:
```scala
scala> spark.conf.set("spark.sql.session.timeZone", "JST")
scala> sql("create table foo (display string, ts timestamp) stored as
parquet tblproperties (parquet.mr.int96.write.zone='JST')")
scala> sql("insert into foo values ('2017-01-01 00:00:00', cast('2017-01-01
00:00:00' as timestamp))")
scala> sql("select * from foo").show(truncate = false)
+-------------------+-------------------+
|display |ts |
+-------------------+-------------------+
|2017-01-01 00:00:00|2017-01-01 00:00:00|
+-------------------+-------------------+
scala> sql("create table bar (display string, ts timestamp) stored as
parquet")
scala> sql("insert into bar values ('2017-01-01 00:00:00', cast('2017-01-01
00:00:00' as timestamp))")
scala> sql("select * from bar").show(truncate = false)
+-------------------+-------------------+
|display |ts |
+-------------------+-------------------+
|2017-01-01 00:00:00|2017-01-01 00:00:00|
+-------------------+-------------------+
scala> spark.conf.set("spark.sql.session.timeZone", "PST")
// ts is adjusted from JST to PST.
scala> sql("select * from foo").show(truncate = false)
+-------------------+-------------------+
|display |ts |
+-------------------+-------------------+
|2017-01-01 00:00:00|2017-01-01 00:00:00|
+-------------------+-------------------+
// ts isn't adjusted.
scala> sql("select * from bar").show(truncate = false)
+-------------------+-------------------+
|display |ts |
+-------------------+-------------------+
|2017-01-01 00:00:00|2016-12-31 07:00:00|
+-------------------+-------------------+
```
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