Using an IN Clause in a Stored Procedure

Question

Hello All:
I have come to the conclusion that my stored procedure is having a problem with the use of an IN clause using a parameterized query.
I have in my Stored Procedure the following: AND oh.status_flag IN (p_OrderStatus)
The p_OrderStatus will contain values along the lines of:
1). p_OrderStatus = 'X'
2). p_OrderStatus = 'X', 'S', 'W'
In my .Net code, I am setting the parameter value as being:
oCommand.Parameters.Add("p_OrderStatus", OracleDbType.Varchar2).Value = Status;
However: this isn't working as something in the IN clause doesn't seem to work as I expected, but if I do the same query through a TORA window, it brings back values.
What is causing this to stop working once I move it to a Stored Procedure and how do I fix it (either the .Net side or the Oracle Side, which I assume it would be something on the Oracle side of things).
Any help is greatly appreciated
Thanks
Andy

Answer 1

One way I've found to get around this is to have .net pass in a comma seperated list of values into the procedure, then have the procedure split it up into a table and use that in the IN. There's probably a better way to do it, but this works:
create or replace
TYPE "STRINGTABLETYPE" AS TABLE OF VARCHAR2(30);
create or replace
FUNCTION "FUNC_STR2STRTBL"
( p_str in varchar2 ) return
stringTableType
as
l_str long default p_str || ',';
l_n number;
l_data stringTableType := stringTabletype();
begin
loop
l_n := instr( l_str, ',' );
exit when (nvl(l_n,0) = 0);
l_data.extend;
l_data( l_data.count ) := ltrim(rtrim(substr(l_str,1,l_n-1)));
l_str := substr( l_str, l_n+1 );
end loop;
return l_data;
end;
Then in your actual query procedure, you can do something like this:
SELECT * FROM table WHERE column IN (select * from THE (select cast(FUNC_STR2TBL(parameter) as STRINGTABLETYPE) from dual))