Does MySQL interrupt the insertion or update of a record in a trigger? _mysql

Here is a way to implement it. The idea is to find a way to interrupt the execution of the code by using an error statement in the trigger.
Mysql> CREATE TABLE T_control (ID int primary key);
Query OK, 0 rows affected (0.11 sec)
mysql> INSERT INTO T_control values (1);
Query OK, 1 row affected (0.05 sec)
Mysql> CREATE TABLE T_bluerosehero (ID int primary key,col int);
Query OK, 0 rows affected (0.11 sec)
Mysql> delimiter//
Mysql> CREATE trigger Tr_t_bluerosehero_bi before insert on T_bluerosehero
-> for each row
-> begin
-> if New.col>30 Then
-> INSERT INTO T_control values (1);
-> End If;
-> end;
->//
Query OK, 0 rows affected (0.08 sec)
Mysql> delimiter;
Mysql>
mysql> INSERT into T_bluerosehero values (1,20);
Query OK, 1 row affected (0.25 sec)
mysql> INSERT into T_bluerosehero values (2,40);
ERROR 1062 (23000): Duplicate entry ' 1 ' for key ' PRIMARY '
Mysql>
Mysql> select * from T_bluerosehero;
+----+------+
| ID | Col |
+----+------+
| 1 | 20 |
+----+------+
1 row in Set (0.00 sec)
Mysql>
Or
Mysql> delimiter//
Mysql> CREATE trigger Tr_t_bluerosehero_bi before insert on T_bluerosehero
-> for each row
-> begin
-> declare i int;
-> if New.col>30 Then
-> INSERT into XXXX values (1);
-> End If;
-> end;
->//
Query OK, 0 rows affected (0.06 sec)
Mysql> delimiter;
Mysql> Delete from T_bluerosehero;
Query OK, 3 rows affected (0.05 sec)
mysql> INSERT into T_bluerosehero values (1,20);
Query OK, 1 row affected (0.06 sec)
mysql> INSERT into T_bluerosehero values (2,40);
ERROR 1146 (42S02): Table ' csdn.xxxx ' doesn ' t exist
Mysql>