Printing the results of an Oracle function

printing_from_an_oracle_function.sql

-- Must me NUMBER or CHAR if you want to print it. Printing a VARCHAR is too complex for expensive databases like Oracle.
VARIABLE r CHAR (1000);

BEGIN
  -- := is for assignment. vs = for equality
  -- bind variables are prefixed with a colon
  -- BANIST1 is the instance
  -- BSK_INFO_REQUEST is the package
  -- get_prel_codes() is the function
  :r := BANINST1.BSK_INFO_REQUEST.get_prel_codes();
END;

-- I don't know what this does. Stupid Oracle.
.

-- I guess this runs everything above.
run;

-- And now we can finally print the results we wanted.
-- Why can't you just do PRINT BANINST1.BSK_INFO_REQUEST.get_prel_codes();? Because it's Oracle and it's too expensive for that sort of simplicity.
PRINT :r;