As you probably now, we created "Database Workbench", a developer
tool for MySQL and other DBMSses.
This tool includes a Stored Routine Debugger for several DBMSses,
including Firebird and InterBase, but not MySQL.
Both Firebird and InterBase do not provide a debugging API, so our
tool emulates stored code behaviour at the client side.
As far as I know, MySQL doesn't have a debugging interface either.
I'm wondering if there would be a market to add such emulation to
For info and screenshots, see:
Would you like to be able to debug stored routines like this?
Download Database Workbench for Oracle, MS SQL Server, Sybase SQL
Anywhere, MySQL, InterBase, NexusDB and Firebird!