My session timezone is Australia/Sydney
if i run the below query my expectation is first column and third column should show the same value. But it is not working as expected for 1753-01-01 00:00:00 timestamp.
spark.conf.set("spark.sql.session.timeZone", "Australia/Sydney")
select '1753-01-01 00:0:00' original_timestamp,to_utc_timestamp('1753-01-01 00:0:00', "Australia/Sydney") to_utc_from_aest ,from_utc_timestamp(to_utc_timestamp('1753-01-01 00:0:00', "Australia/Sydney"),"Australia/Sydney") from_utc_to_aest
UNION all
select '2023-01-01 00:0:00',to_utc_timestamp('2023-01-01 00:0:00', "Australia/Sydney"),from_utc_timestamp(to_utc_timestamp('2023-01-01 00:0:00', "Australia/Sydney"),"Australia/Sydney")
Hello Kaniz,
It's working till 1896-01-01 00:00:00 which rules out the spark's supported date range issue.
Secondly I don't want the accurate timestamp but time delta subtracted in to_utc_timestamp should be the exact value being added in from_utc_timestamp or vice versa but in the snippets you can see there is 5 minutes +- issue.
P.S. It works correctly on job cluster and sql warehouse. This issue is only in interactive cluster.
Hi @Rahul Lalwaniโ (Customer)โ,
In Interactive cluster spark.sql.datetime.java8API.enabled is disabled when we enable spark.sql.datetime.java8API.enabled to true , we can see crt values for 1753-01-01 as well.
The reason for enabling the above config is because in Date and timestamp string literals are parsed by using Java 8 time API and Spark's session time zone. Before the changes, date/timestamp values were collected as legacy types `java.sql.Date`/`java.sql.Timestamp`, and the value of such types didn't respect the config `spark.sql.session.timeZone`. To have consistent view, users had to keep JVM time zone and Spark's session time zone in sync.
And the reason for 5 mins difference is due to standardization of timezones till 1895 the offset was UTC+10:05 post that i.e from 1896 the offset is UTC+10:00.
