navicat不能创建函数解决方法分享

第一次写mysql function，一直报错，

err] 1064 - you have an error in your sql syntax; check the manual that corresponds to your mysql server version for the right syntax to use near '`company_id` int) returns varchar(20) charset utf8

begin

本来的函数：

create definer=`33323`@`%` function `createsalecode`(`benginstr` varchar,`company_id` int) returns varchar(20) charset utf8 
begin 
  declare nearnum varchar(20);  
 declare nowdatepre varchar(20); 
 declare numout varchar(20);  
 select a.sale_code into nearnum from d_sale a where a.company_id = company_id order by a.sale_id desc limit 1; 
 select concat(extract(year_month from now()),lpad(extract(day from now()), 2, 0)) into nowdatepre; 
 if locate(nowdatepre,nearnum)>0  
  then  
    set numout = nearnum +1;   
  else  
    set numout = concat(beginstr,nowdatepre,'00001');  
  end if; 
 return numout; 
end 

这段函数在navicat上边执行不起来，在多次尝试之后将代码修改为以下：

delimiter $$ 
create definer=`12212`@`%` function createsalecode(benginstr varchar(20),company_id int(11) ) returns varchar(20) charset utf8 
begin 
  declare nearnum varchar(20);  
 declare nowdatepre varchar(20); 
 declare numout varchar(20);  
 select a.sale_code into nearnum from d_sale a where a.company_id = company_id order by a.sale_id desc limit 1; 
 select concat(extract(year_month from now()),lpad(extract(day from now()), 2, 0)) into nowdatepre; 
 if locate(nowdatepre,nearnum)>0  
  then  
    set numout = nearnum +1;   
  else  
    set numout = concat(beginstr,nowdatepre,'00001');  
  end if; 
 return numout; 
end$$ 
delimiter ; 

问题解决。

默认情况下，delimiter是分号;。

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