Problems using a parameter

Question

Hi, I am running into a problem that I can't fix.
This is the code I have in the after parameter form trigger. I am selecting a character field from the holder table that has characters in like this '010204050709' I then put these numbers into a parameter called :p_condit_comma and I add a comma between each set of two numbers. I then use this parameter in my query in the where clause as can be seen below. This should work unless I am missing something.
Using the parameter in the query produces no output and no error, if I replace the parameter in the query with (01,02,03) the report produces the desired output. I have also checked that the parameter contains what I am expecting eg. 01,02,04
Thank you
Michael
function AfterPForm return boolean is
v_conditions holder.conditions%type;
v_num NUMBER(2) := 1;
begin
SELECT conditions INTO v_conditions
FROM holder
WHERE authority = :authority;
LOOP
     EXIT WHEN SUBSTR(v_conditions,v_num,2) IS NULL;
     IF v_num = 1 THEN
     :p_condit_comma := SUBSTR(v_conditions,v_num,2);
     ELSE     
     :p_condit_comma := :p_condit_comma || ',' || SUBSTR(v_conditions,v_num,2);
     END IF;
     v_num := v_num + 2; END LOOP;     
     return (TRUE);
end;
SQL Query
SELECT ALL CONDIT.CONDITION, CONDIT.CONDIT_MEM
FROM CONDIT
WHERE condition IN (:p_condit_comma)

Answer 1

Hi M
I have tried what you suggested
:p_condit_comma := :p_condit_comma ||''''|| ',' || SUBSTR(v_conditions,v_num,2);
this gives you something like this 01',02',03',04' and if you add an inverted comma before the number like this
:p_condit_comma := :p_condit_comma ||''''|| ',' ||''''|| SUBSTR(v_conditions,v_num,2);
you get the following error "ORA-06502 PL/SQL Numeric or value error"
I have tried many different combinations of this and I still have problems, maybe I need a new approach.
Thanks
Michael