How to return a DECIMAL(4,0) in TEXT keeping the 0000 format?

Question

I want to return in a Stored Function a value as TEXT but I want to be 0001, and not 1

I have this code fragments:

DECLARE _RESTRICTEDROUTE DECIMAL(4,0);

RETURN(_RESTRICTEDROUTE);

I tried

RETURN(CAST(_RESTRICTEDROUTE AS TEXT)); 

but failed.

Answer 1

Use LPAD().

This should work:

RETURN(LPAD(_RESTRICTEDROUTE, 4, "0"))