Bug #11394 recursion in SP crash server
Submitted: 16 Jun 2005 17:59 Modified: 7 Jul 2005 16:21
Reporter: Oleksandr Byelkin Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server Severity:S1 (Critical)
Version:5.0 OS:
Assigned to: Dmitry Lenev CPU Architecture:Any

[16 Jun 2005 17:59] Oleksandr Byelkin 
Description:
Server dies on recursion because many Items are not reenterable

How to repeat:
delimiter |;

create function f5(i int) returns int
begin
  if i <= 0 then
    return 0;
  else
    return (i in (100, 200, f5(i-1), 400));
  end if;
end|

select f5(1)|
select f5(2)|
select f5(3)|
[1 Jul 2005 9:11] Dmitry Lenev 
Hi!

As was discussed on IRC the patch disabling recursion for stored routines was commited:
http://lists.mysql.com/internals/26578

Later we plan to remove this restriction (by using separate sp_head instance for each recursive routine invocation).
[6 Jul 2005 7:43] Dmitry Lenev 
Fixed in 5.0.9
[7 Jul 2005 16:21] Jon Stephens 
Thank you for your bug report. This issue has been committed to our
source repository of that product and will be incorporated into the
next release.

If necessary, you can access the source repository and build the latest
available version, including the bugfix, yourself. More information 
about accessing the source trees is available at
    http://www.mysql.com/doc/en/Installing_source_tree.html

Additional info:

Documented in 5.0.9 change history; closed.