The subtime() function returns an incorrect result when using the date type #56861
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
create table lrr_test(`COL1` date);
insert into lrr_test values('2024-11-01');
insert into lrr_test values('2020-11-01');
select col1,subtime(col1,'12:00:01.341300') from lrr_test;
2. What did you expect to see? (Required)
Mysql：
+------------+---------------------------------+
| col1 | subtime(col1,'12:00:01.341300') |
+------------+---------------------------------+
| 2024-11-01 | 2024-10-31 11:59:58.658700 |
| 2020-11-01 | 2020-10-31 11:59:58.658700 |
+------------+---------------------------------+
3. What did you see instead (Required)
+------------+---------------------------------+
| col1 | subtime(col1,'12:00:01.341300') |
+------------+---------------------------------+
| 2024-11-01 | -12:00:01.341300 |
| 2020-11-01 | -12:00:01.341300 |
+------------+---------------------------------+
4. What is your TiDB version? (Required)
Release Version: v8.4.0
Edition: Community
Git Commit Hash: 2511e92
Git Branch: HEAD
UTC Build Time: 2024-10-27 16:16:04
GoVersion: go1.23.2
Race Enabled: false
Check Table Before Drop: false
Store: tikv