Maxim Gekk created SPARK-28471:
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Summary: Formatting dates with negative years
Key: SPARK-28471
URL: https://issues.apache.org/jira/browse/SPARK-28471
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 2.4.3
Reporter: Maxim Gekk
While converting dates with negative years to strings, Spark skips era
sub-field by default. That's can confuse users since years from BC era are
mirrored to current era. For example:
{code}
spark-sql> select make_date(-44, 3, 15);
0045-03-15
{code}
Even negative years are out of supported range by the DATE type, it would be
nice to indicate the era for such dates.
PostgreSQL outputs the era for such inputs:
{code}
# select make_date(-44, 3, 15);
make_date
---------------
0044-03-15 BC
(1 row)
{code}
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