mysql创建函数定义变量是一个集合怎么写?

fu7100

我的函数如下,执行时候报错
create FUNCTION create_data()
BEGIN
    declare item VARCHAR(4000);
    set item=select concat(
(select replace(uuid(),'-','')),
000001,
000001,
(select LPAD(FLOOR((RAND()*10000)),6,0)),
(select concat(floor(2017+(rand()*1)),'-',lpad(floor(1+( rand()*12) ),2,0),'-',lpad(floor((1+rand()*30)),2,0),' ',lpad(floor((rand()*23)),2,0),':',lpad((floor(rand()*59)),2,0),':',lpad((floor(rand()*59)),2,0))),
18,
-1,
0,
'Men',
0,
0,
0,
null,
'',
'151940162900000000',
90,
1,
1,
1,
(select concat(floor(2017+(rand()*1)),'-',lpad(floor(1+( rand()*12) ),2,0),'-',lpad(floor((1+rand()*30)),2,0),' ',lpad(floor((rand()*23)),2,0),':',lpad((floor(rand()*59)),2,0),':',lpad((floor(rand()*59)),2,0))),
0,
0,
0,
0,
0,
0,
'',
'',
'',
0,
'',
'',
'',
'Uploaded',
1,
''
)
RETURN item
END

报错如下:
[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 'BEGIN
declare item VARCHAR(4000);
set item=select concat((select replace(uuid(' at line 2