Adam Szita created HIVE-22099:
---------------------------------
Summary: GenericUDFDateFormat can't handle Julian dates properly
Key: HIVE-22099
URL: https://issues.apache.org/jira/browse/HIVE-22099
Project: Hive
Issue Type: Bug
Reporter: Adam Szita
Assignee: Adam Szita
Currently dates that belong to Julian calendar (before Oct 15, 1582) are
handled improperly by DateFormat UDF:
Although the dates are in Julian calendar, the formatter insists to print these
according to Gregorian calendar causing multiple days of difference in some
cases:
{code:java}
beeline> select date_format('1001-01-05','dd---MM--yyyy');
+----------------+
| _c0 |
+----------------+
| 30---12--1000 |
+----------------+{code}
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