Oracle Instant Client and OUT Parameter of custom type in Stored Procedures

Question

Hi @ all!
I try to set up a simple client application, that calls a stored procedure via Instant Client from C#.
The stored procedure and assiciated types looks like this:
TYPE MYVALUE AS OBJECT
      Id      INTEGER,
      value     FLOAT
TYPE MYVALUELIST AS TABLE OF MYVALUE;
PROCEDURE ReadValues( ID IN INTEGER,
                                    RESULTSET OUT MYVALUELIST)
                                       IS
...I created an Oracle Command executing this SP and added OracleParameters for ID and (where I got stuck) the RESULTSET.
Is it possible to pass a parameter with a custom type from C# in some way?
I already tried it as a function with SELECT * FROM TABLE(ReadValues(1));
With my parameter RESULTSET as the RETURN type. But since I use DML within the procedure, this does not work inside of a query...
Any suggestions?
Thanks in advance!

Answer 1

Hi Greg!
Sorry, I misunderstood the forum topic then. =(
Anyway, in the example you provided in the link, this is nearly exactly my situation. But there the Oracle.DataAccess.Client is used, where the OracleDBType can be called to initialize an object of type person. I use the instant client libraries called by using System.Data.OracleClient. There is only the OracleType enum, that does not contain an object or something similar.
So I do it right now after trying a bit with a ref cursor parameter and an OracleDataAdapter - the ref cursor is passed back from Oracle as a DataReader, so die DataAdapter is able to use it for a .Fill():
OracleCommand cmd = new OracleCommand();
cmd.Parameters.Add("RESULTSET", OracleType.Cursor).Direction = ParameterDirection.Output;
OracleDataAdapter odr = new OracleDataAdapter(cmd);
DataTable result = new DataTable();
odr.Fill(result);Within my stored procedure I just added the following OUT parameter:
PROCEDURE ReadValues( ID IN INTEGER,
                                    RESULTSET OUT sys_refcursor)
                                       IS
currentlist MYVALUELIST;
... [Adding elements to that list] ...
OPEN resultset for select * from TABLE(currentlist);It works now, but I don't like that solution that much since I'm always afraid that there are lots of opened cursors idyling around. Do I have to close this one explicitly after filling my table by the DataAdapter?
Regards