Re: how to use parameters in a procedure ?

[Per-Erik Martin]

You get the error if the selects returns no data (and thus it can't set the variable).

So your select doesn't return any data, probably because you use @ta_config - it should be just ta_config.

And, you must not declare local variables with the same names as the OUT parameters, this will make it impossible to set the OUT parameters.
(You will set the local variable instead - but as the code is written, you don't even try to set them.)

pem, Senior Software Dev., MySQL AB