Bug #9820 Rollup crash with min(varchar)
Submitted: 11 Apr 2005 17:45 Modified: 17 May 2005 22:38
Reporter: Peter Gulutzan
Status: Closed
Category:Server: Optimizer Severity:S2 (Serious)
Version:5.0.5-beta-debug OS:Linux (SUSE 9.2)
Assigned to: Bugs System Target Version:

[11 Apr 2005 17:45] Peter Gulutzan
Description:
If I have a table with a CHAR or VARCHAR column, and I say SELECT MIN(column) ... GROUP
BY ... WITH ROLLUP, crash. Same thing if SELECT MAX(column). No problem if SELECT
COUNT(column).

How to repeat:
mysql> create table t93 (s1 varchar(5));
Query OK, 0 rows affected (0.00 sec)

mysql> insert into t93 values ('Wall');
Query OK, 1 row affected (0.00 sec)

mysql> select min(s1) from t93 group by s1 with rollup;
ERROR 2013 (HY000): Lost connection to MySQL server during query
[6 May 2005 17:42] Jani Tolonen
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
[17 May 2005 22:38] Paul DuBois
Noted in 5.0.6 changelog.