sp-code.result

开启mysql的远程连接的方法 mysql-noinstall-5.1.6-alpha-win32.zip

create procedure empty()
begin
end;
show procedure code empty;
Pos	Instruction
drop procedure empty;
create function almost_empty()
returns int
return 0;
show function code almost_empty;
Pos	Instruction
0	freturn 3 0
drop function almost_empty;
create procedure code_sample(x int, out err int, out nulls int)
begin
declare count int default 0;
set nulls = 0;
begin
declare c cursor for select name from t1;
declare exit handler for not found close c;
open c;
loop
begin
declare n varchar(20);
declare continue handler for sqlexception set err=1;
fetch c into n;
if isnull(n) then
set nulls = nulls + 1;
else
set count = count + 1;
update t2 set idx = count where name=n;
end if;
end;
end loop;
end;
select t.name, t.idx from t2 t order by idx asc;
end//
show procedure code code_sample;
Pos	Instruction
0	set count@3 0
1	set nulls@2 0
2	cpush c@0
3	hpush_jump 6 4 EXIT
4	cclose c@0
5	hreturn 0 19
6	copen c@0
7	set n@4 NULL
8	hpush_jump 11 5 CONTINUE
9	set err@1 1
10	hreturn 5
11	cfetch c@0 n@4
12	jump_if_not 15 isnull(n@4)
13	set nulls@2 (nulls@2 + 1)
14	jump 17
15	set count@3 (count@3 + 1)
16	stmt 4 "update t2 set idx = count where name=n"
17	hpop 1
18	jump 7
19	hpop 1
20	cpop 1
21	stmt 0 "select t.name, t.idx from t2 t order ..."
drop procedure code_sample;