Question

I have stored procedure that calls another stored procedure. Let’s call them OUTER and INNER.

The INNER procedure can detect errors in the input and if it does it will raise/signal it like this

signal sqlstate '45000' set message_text = 'some error';

In OUTER procedure I’m able to catch this with a normal handler like this

declare exit handler for sqlstate '45000'
begin
  -- this is where I'd like to access the message_text from INNER
end    

but I fail to find a way of reading the internal parts of the signal.

I’ve seen that it might be available in 5.6 but that isn’t GA yet and will probably be shaky for a while after release.

Any takers on this.?

Answer 1

As this is not available until 5.6 I ended up creating a stored procedure that both sends the signal but also sets the error text in a session varible

delimiter //

create procedure send_signal (error_text varchar(255))
begin
  set @session_error_text := error_text;
  signal sqlstate '45000' set message_text = error_text;
end//

delimiter ;