MySQL Bugs: #7953: Calling a procedure with an out parameter gives ERROR 1247 (42S22)

Bug #7953	Calling a procedure with an out parameter gives ERROR 1247 (42S22)
Submitted:	17 Jan 2005 11:37	Modified:	25 Feb 2005 15:44
Reporter:	Sushil Kumar	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server	Severity:	S3 (Non-critical)
Version:	5.0.2-alpha-log	OS:	Windows (Windows 2000 / XP)
Assigned to:	Per-Erik Martin	CPU Architecture:	Any

Description:
I have a fresh installation of MySQL from the mysql-5.0.2-alpha-win-noinstall.zip.

I am trying to use stored procedures in MySQL.

I create a stored procedure and call as deescribed under. I get a "ERROR 1247 (42S22): Reference '(null)' not supported (reference to group function)" error.

How to repeat:
mysql> create table t1 (f1 int primary key);
Query OK, 0 rows affected (0.08 sec)

mysql> create table t2 (f1 int primary key);
Query OK, 0 rows affected (0.06 sec)

mysql> delimiter //
mysql> CREATE PROCEDURE test (OUT param1 INT)
    -> BEGIN
    -> SELECT (MAX( f1) + 1) INTO param1 FROM t1;
    -> INSERT INTO t1 VALUES (param1);
    -> END
    -> //
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO t1 VALUES (1)//
Query OK, 1 row affected (0.00 sec)

mysql> CALL test(@a)//
ERROR 1247 (42S22): Reference '(null)' not supported (reference to group function)

I have applied a patch as suggested in Bug 6950 / 6955.

Sometimes, I get the error if I execute the same stored procedure the second time.

While I know that I can use auto increment, in our actual case, the primary key is a composite key, so I cannot use auto increment. I have given the example to simplify the problem.

verified with 5.0.2 on linux, on 5.0.3 it even crashes the server

This was fixed by a previous bugfix.