You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
656 B
34 lines
656 B
3 months ago
|
drop table if exists t3;
|
||
|
|
create table t3 ( f bigint unsigned not null );
|
||
|
|
drop procedure if exists fib;
|
||
|
|
create procedure fib(n int unsigned)
|
||
|
|
begin
|
||
|
|
if n > 1 then
|
||
|
|
begin
|
||
|
|
declare x, y bigint unsigned;
|
||
|
|
declare c cursor for select f from t3 order by f desc limit 2;
|
||
|
|
open c;
|
||
|
|
fetch c into y;
|
||
|
|
fetch c into x;
|
||
|
|
insert into t3 values (x+y);
|
||
|
|
call fib(n-1);
|
||
|
|
## Close the cursor AFTER the recursion to ensure that the stack
|
||
|
|
## frame is somewhat intact.
|
||
|
|
close c;
|
||
|
|
end;
|
||
|
|
end if;
|
||
|
|
end|
|
||
|
|
set @@max_sp_recursion_depth= 20|
|
||
|
|
insert into t3 values (0), (1)|
|
||
|
|
call fib(4)|
|
||
|
|
select * from t3 order by f asc|
|
||
|
|
f
|
||
|
|
0
|
||
|
|
1
|
||
|
|
1
|
||
|
|
2
|
||
|
|
3
|
||
|
|
drop table t3|
|
||
|
|
drop procedure fib|
|
||
|
|
set @@max_sp_recursion_depth= 0|
|