Strange behavior of CALL when passing literal numeric parameters (bug?)

[kuba_michalik]

When passing numeric literal as a parameter into a subroutine, QlikView creates extraneous variables with name and value both equal to the parameter. After reloading this script:

SUB subroutine(numeric_parameter);
     TRACE $(numeric_parameter);
ENDSUB;

CALL subroutine(1234);

this is the variable overview:

Has anybody else encountered this? If by chance anyone from Qlik sees this - could it be a bug, or if it's working as intended, could you shed some light on why it works this way?

This is not particularly impactful, but I like to write my subroutines so that they clean up after themselves when done. It's kind of hard to do because of this behavior

[swuehl · Accepted solution]

Yes, this is a known behaviour and discussed e.g. in

Literals as sub parameters become variables

Try passing your number in the call using single quotes or brackets.

CALL subroutine('1234'); 

CALL subroutine((1234));