MySQL roles don't work in a Delphi application

Question

I am using MariaDB10 with DBForge and creating a Delphi Project, I created a role to manage the permissions but it's not working good.

1 - Create a role on DbForge panel with a permission for a procedure myprocedure

2 - Add a Tmyquery in my Delphi project with the code set default role myrole

3 - Add a procedure on afterConnect calling the query created

4 - Set disconnectedMode = true on MyConnection options

Sometimes this process works, but most times I receive an Error: Acess denied to user XX for routine myprocedure

This happens with routines, functions and tables that I try to control the permissions

Besides that every time that I give a permission on a role and after edit the procedure the role loses the permission that I gave before

Obs: The roles work okey on DbForge panel is just when I tried to put this on Delphi

Answer 1

If the user doesn't already have access to that role then them running set default role myrole doesn't give it to them.

SET DEFAULT ROLE requires these privileges:

Setting the default roles for another user requires the global CREATE USER privilege, or the UPDATE privilege for the mysql.default_roles system table.

Setting the default roles for yourself requires no special privileges, as long as the roles you want as the default have been granted to you.