Allow multiple users to change functions in MySQL I want to make multiple users and allow them to change  procedures,functions and triggers in same DB. There must be user devel for    developers and admin for admin, both can change developers DB, but admin is not root, i.e. he can't change everything, only some databases. 
User admin have following permissions:

GRANT ALL PRIVILEGES ON some_db_prefix%.* TO 'admin'@'%' WITH GRANT OPTION

All fine except definers in triggers and procedures. If I set definer in database to devel@'%', i can't edit procedures as admin, but root user can, of course. 
How can I allow to modify triggers,functions and procedures to multiple users?

UPD: I can't edit procedures as admin even when definer is `%`@`%`.

UPD2: MySQL version:
Server version: 5.6.23-ndb-7.4.5-cluster-gpl-log MySQL Cluster Community Server (GPL)

UPD 3: (moved to new question Allow multiple users to see procedures and functions )

UPD 4: Manuals say that only way to change body of procedure is to drop it and create new. So, I can do it, and my question is incorrect, I want not only change functions/procedures using different users, but also see body (code) of funtions/procedures. That's why I have created new question.
As MySQL's documentation says:


  The ALL or ALL PRIVILEGES privilege specifier is shorthand. It stands
  for “all privileges available at a given privilege level” (except
  GRANT OPTION). For example, granting ALL at the global or table level
  grants all global privileges or all table-level privileges.


Just use: 

GRANT ALL ON test.* TO 'admin'@'%';
FLUSH PRIVILEGES;


Test:

mysql&gt; CREATE USER 'admin'@'%' IDENTIFIED BY 'test';
Query OK, 0 rows affected (0.01 sec)

mysql&gt; CREATE USER 'devel1'@'%' IDENTIFIED BY 'test';
Query OK, 0 rows affected (0.00 sec)

mysql&gt; GRANT ALL ON test.* TO 'admin'@'%';
Query OK, 0 rows affected (0.00 sec)

mysql&gt; GRANT ALL ON test.* TO 'devel1'@'%';
Query OK, 0 rows affected (0.00 sec)

mysql&gt; FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql&gt; SHOW GRANTS FOR 'devel1'@'%';
+-------------------------------------------------------------------------------------------------------+
| Grants for devel1@%                                                                                   |
+-------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'devel1'@'%' IDENTIFIED BY PASSWORD '*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29' |
| GRANT ALL PRIVILEGES ON `test`.* TO 'devel1'@'%'                                                      |
+-------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)

mysql&gt; SHOW GRANTS FOR 'admin'@'%';
+------------------------------------------------------------------------------------------------------+
| Grants for admin@%                                                                                   |
+------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'admin'@'%' IDENTIFIED BY PASSWORD '*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29' |
| GRANT ALL PRIVILEGES ON `test`.* TO 'admin'@'%'                                                      |
+------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)