ORA-00936 Missing expression - error in composite statement

Question

I'm using the following statement to call a function which uses a number retrieved from a table i.e.
SELECT GETNEXTBUSINESSDATE(TO_DATE('28/08/2003','dd/mm/yyyy'), TO_NUMBER(SELECT VALUE1 FROM PARAMETERS WHERE PARCODE = 'CCR1' AND ATTRIBUTE1 = 'CCRNRQST1')) FROM DUAL;
The function adds the value store in the value1 field to a date to get the next buisness date. The above statement is giving me an ORA-00936 Missing expression error message.
Can anybody help ?

Answer 1

We can't pass a query as a parameter.
You'll have to write a function that accepts PARCODE and ATTRIBUTE1 as parameters, or figure some other way of getting the value.
As I typed that, it occurred to me that this might work:
SELECT GETNEXTBUSINESSDATE(TO_DATE('28/08/2003','dd/mm/yyyy')
      , x.val1)
FROM ( SELECT TO_NUMBER(VALUE1) as val1
       FROM   PARAMETERS
       WHERE PARCODE = 'CCR1'
       AND ATTRIBUTE1 = 'CCRNRQST1') x;I'm not guaranteeing anything as I've never tried running a function from an in-line view.
Cheers, APC