MySQL存储过程 事务transaction

create table testproc(id int(4) primary key, name varchar(100));  
   
CREATE PROCEDURE test_proc_ins(  
IN i_id INT,  
IN i_name VARCHAR(100)  
)  
BEGIN  
           INSERT INTO testproc VALUES (i_id, i_name);  -- 语句1  
           INSERT INTO testproc VALUES (i_id, i_name);  -- 语句2（因为id为PK，此语句将出错）。  
END;  

CREATE PROCEDURE test_proc_ins(  
IN i_id INT,  
IN i_name VARCHAR(100)  
)  
BEGIN  
start transaction; --整个存储过程指定为一个事务  
           INSERT INTO testproc VALUES (i_id, i_name);  
           INSERT INTO testproc VALUES (i_id+1, i_name); -- 这里把id+1，避免主键冲突  
commit; -- 语句1。必须主动提交  
END;  

CREATE PROCEDURE test_proc_ins(  
IN i_id INT,  
IN i_name VARCHAR(100),  
OUT o_ret INT)  
BEGIN  
start transaction;  
           INSERT INTO testproc VALUES (i_id, i_name);  
           INSERT INTO testproc VALUES (i_id+1,i_name);  
           commit; -- 语句1，提交后，事务已结束  
           set o_ret = 1;  
           start transaction; -- 再启一个事务  
           INSERT INTO testproc VALUES (i_id+2,i_name); -- 语句2  
           INSERT INTO testproc VALUES (i_id+2,i_name); -- 语句3  
           set o_ret = 2;  
           commit; -- 数据正常的情况下，需要再次commit以结束事务  
END;  

DROP PROCEDURE IF EXISTS  test_sp1   
CREATE PROCEDURE test_sp1( )    
    BEGIN    
    DECLARE t_error INTEGER DEFAULT 0;    
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET t_error=1;    
    
        START TRANSACTION;    
            INSERT INTO test VALUES(NULL, ‘test sql 001‘);       
            INSERT INTO test VALUES(‘1‘, ‘test sql 002‘);       
    
        IF t_error = 1 THEN    
            ROLLBACK;    
        ELSE    
            COMMIT;    
        END IF;    
   select t_error;   //返回标识位的结果集；  
END