zhiqiang-hhhh opened a new pull request, #31229:
URL: https://github.com/apache/doris/pull/31229
with tmp as (
select CONCAT(
YEAR('2024-02-06 03:37:07.157'), '-',
LPAD(MONTH('2024-02-06 03:37:07.157'), 2, '0'), '-',
LPAD(DAY('2024-02-06 03:37:07.157'), 2, '0'), ' ',
LPAD(HOUR('2024-02-06 03:37:07.157'), 2, '0'), ':',
LPAD(MINUTE('2024-02-06 03:37:07.157'), 2, '0'), ':',
LPAD(SECOND('2024-02-06 03:37:07.157'), 2, '0'), '.',
"123456789" )
AS generated_string)
select generated_string, cast(generated_string as DateTime(6))
from tmp
before (incorrect round)
+-------------------------------+-----------------------------------------+
| generated_string | cast(generated_string as DATETIMEV2(6)) |
+-------------------------------+-----------------------------------------+
| 2024-02-06 03:37:07.123456789 | 2024-02-06 03:37:07.123456 |
+-------------------------------+-----------------------------------------+
after (round up, keep consistent with mysql):
+-------------------------------+-----------------------------------------+
| generated_string | cast(generated_string as DATETIMEV2(6)) |
+-------------------------------+-----------------------------------------+
| 2024-02-06 03:37:07.123456789 | 2024-02-06 03:37:07.123457 |
+-------------------------------+-----------------------------------------+
1 row in set (0.03 sec)
same work with #30744 but implemented on BE
## Proposed changes
Issue Number: close #xxx
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