[GitHub] [spark] MaxGekk commented on pull request #28709: [WIP][SQL] Make legacy date formatters independent from the default JVM time zone

[GitBox <gi...@apache.org>]

MaxGekk commented on pull request #28709:
URL: https://github.com/apache/spark/pull/28709#issuecomment-638123922


   @cloud-fan @HyukjinKwon The changes can lead to inconsistent behaviour when JVM and session time zones are different:
   ```scala
   $ export TZ="Europe/Moscow"
   $ ./bin/spark-sql -S
   spark-sql> set spark.sql.session.timeZone=America/Los_Angeles;
   spark.sql.session.timeZone	America/Los_Angeles
   spark-sql> select date '2020-06-03';
   2020-06-02
   spark-sql> select make_date(2020, 6, 3);
   2020-06-02
   ```
   This happens because `toJavaDate()` w/ the default JVM time zone is used while collecting dates.
   


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