语法:
declare continue handler for sqlstate '错误代码值' set 变量=变量值
如:
create procedure p_insertDome()
begin
declare continue handler for sqldate '42S02' set @x=1;
insert into userinfo2(uid,name,password)values('1','demo','123456');
insert into employ('empno','date')values('2220','1993-12-14');
end;
$$;
假如第一个语句出现数据表不存在,就不会影响下一行语句执行