AcKing-Sam commented on PR #32518:
URL: https://github.com/apache/doris/pull/32518#issuecomment-2017425595
@zhiqiang-hhhh
Hi, I just tested below in Doris:
```sql
mysql> select cast(c as decimal) from (select cast("9999-12-31" as datetime)
c) t3;
ERROR 1105 (HY000): errCode = 2, detailMessage =
(127.0.0.1)[E-124]Arithmetic overflow, convert failed from 703674110198153216,
expected data is [-999999999, 999999999]
```
For MySQL, the result is:
```sql
+--------------------+
| cast(c as decimal) |
+--------------------+
| 9999999999 |
+--------------------+
```
I think for datetime, current version is okay because of the strict overflow
detection in Doris.
I picked this issue from [Bug summary for doris
2.0.4](https://github.com/apache/doris/issues/32234).
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