How to properly declare handlers

Question

I'm trying to add a stored procedure to MySQL scheme.
I get an error ERROR: Error 1193: Unknown system variable 'inner_done'.
Here's the code
I have to note it doesn't matter which handler is declared last. It's name will be in error, while the first one declared is somehow ok. I even tried playing with the plece to declare handler, e.g. create a new BEGIN-END block, but the error still gets me, randomly choosing which handfler to display as "unknown"

Answer 1

As commented by @RyanVincent, the error describes inner_done was not declare:

DECLARE done, inner_done BOOLEAN DEFAULT FALSE;

And wrap your inner loop in a BEGIN - END block.

Edit: the declare handler statement only defines the handler, so before this is needed the declare statement for the variable which change its value as a condition.

DECLARE inner_done BOOLEAN DEFAULT FALSE;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET inner_done = TRUE;