Bruce Robbins created HIVE-19354:
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Summary: from_utc_timestamp returns incorrect results for datetime
values with timezone
Key: HIVE-19354
URL: https://issues.apache.org/jira/browse/HIVE-19354
Project: Hive
Issue Type: Bug
Components: Hive
Affects Versions: 3.1.0
Reporter: Bruce Robbins
On the master branch, from_utc_timestamp returns incorrect results for datetime
strings that contain a timezone:
{noformat}
hive> select from_utc_timestamp('2000-10-10 00:00:00+00:00',
'America/Los_Angeles');
OK
2000-10-09 10:00:00
Time taken: 0.294 seconds, Fetched: 1 row(s)
hive> select from_utc_timestamp('2000-10-10 00:00:00', 'America/Los_Angeles');
OK
2000-10-09 17:00:00
Time taken: 0.121 seconds, Fetched: 1 row(s)
hive>
{noformat}
Both inputs are 2000-10-10 00:00:00 in UTC time, but I got two different
results.
In version 2.3.3, from_utc_timestamp doesn't accept timezones in its input
strings, so it does not have this bug:
{noformat}
hive> select from_utc_timestamp('2000-10-10 00:00:00+00:00',
'America/Los_Angeles');
OK
NULL
Time taken: 5.152 seconds, Fetched: 1 row(s)
hive> select from_utc_timestamp('2000-10-10 00:00:00', 'America/Los_Angeles');
OK
2000-10-09 17:00:00
Time taken: 0.069 seconds, Fetched: 1 row(s)
hive>
{noformat}
Since the function is expecting a UTC datetime value, it probably should
continue to reject input that contains a timezone component.
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