详解MySQL中timestamp和datetime时区问题导致做DTS遇到的坑

mysql> show create table test_time\G;
*************************** 1. row ***************************
Table: test_time
Create Table: CREATE TABLE `test_time` (
  `id` int NOT NULL AUTO_INCREMENT,
  `ts` timestamp(6) NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
  `dt` datetime(6) DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
1 row in set (0.00 sec)

mysql> show variables like '%time_zone%';
+------------------+--------+
| Variable_name    | Value  |
+------------------+--------+
| system_time_zone | CST    |
| time_zone        | SYSTEM |
+------------------+--------+
2 rows in set (0.01 sec)

mysql> select * from test_time;
Empty set (0.00 sec)

mysql> insert into test_time() values();
Query OK, 1 row affected (0.00 sec)

mysql> select * from test_time;
+----+----------------------------+----------------------------+
| id | ts                         | dt                         |
+----+----------------------------+----------------------------+
|  3 | 2021-12-05 15:04:13.293949 | 2021-12-05 15:04:13.293949 |
+----+----------------------------+----------------------------+
1 row in set (0.00 sec)

mysql> set time_zone='+00:00';
Query OK, 0 rows affected (0.00 sec)

mysql> select * from test_time;
+----+----------------------------+----------------------------+
| id | ts                         | dt                         |
+----+----------------------------+----------------------------+
|  3 | 2021-12-05 07:04:13.293949 | 2021-12-05 15:04:13.293949 |
+----+----------------------------+----------------------------+
1 row in set (0.01 sec)

[mysql %] mysqlbinlog -v --base64-output=decode-rows ./mysqlbin.000012
... ...
SET @@SESSION.GTID_NEXT= '1cf4493a-dafd-11eb-944c-4016af29c14c:1416767'/*!*/;
# at 14220
#211205 15:04:13 server id 1  end_log_pos 14308 CRC32 0x1fd913a3 Query thread_id=137 exec_time=0 error_code=0
SET TIMESTAMP=1638687853.293949/*!*/;
BEGIN
/*!*/;
# at 14308
#211205 15:04:13 server id 1  end_log_pos 14368 CRC32 0xbb8937fb Table_map: `testa`.`test_time` mapped to number 121
# at 14368
#211205 15:04:13 server id 1  end_log_pos 14423 CRC32 0x2e0a3baa Write_rows: table id 121 flags: STMT_END_F
### INSERT INTO `testa`.`test_time`
### SET
###   @1=3
###   @2=1638687853.293949
###   @3='2021-12-05 15:04:13.293949'
# at 14423
#211205 15:04:13 server id 1  end_log_pos 14454 CRC32 0x68cee280 Xid = 1416
COMMIT/*!*/;