C＃Oracle过程调用的问题

Question

looking for some help in identifying the correct method of calling an Oracle Procedure call from the given info below. I am using .NET 4 with Oracle.DataAccess.Client. Below are the details of the Procedure from Oracle:

CREATE OR REPLACE PACKAGE APPS.syk_serial_num_details
AS
TYPE account_rec_type IS RECORD(
  inv_item_id                   NUMBER
 ,item_num                      VARCHAR2(40)
 ,item_desc                     VARCHAR2(240)
 ,acc_num                       VARCHAR2(30)
 ,ship_to                       VARCHAR2(1000)
 ,bill_to                       VARCHAR2(1000)
);

TYPE account_set IS TABLE OF account_rec_type; 

 PROCEDURE get_prod_details(
  p_serial_num               IN       VARCHAR2
 ,p_acc_nums                 IN       VARCHAR2
 ,p_ship_tos                 IN       VARCHAR2
 ,p_acc_set                  OUT      syk_serial_num_details.account_set
 ,p_status                   OUT      VARCHAR2
 );

END syk_serial_num_details

here are some more details showing the param types and size...below is an example of the procedure call from Toad interface:

DECLARE
l_serial_num                  csi_item_instances.serial_number%type;
l_acc_nums                    VARCHAR2(100);
l_ship_tos                    VARCHAR2(100);
l_acc_set  syk_serial_num_details.account_set;
l_status                      VARCHAR2(80);

BEGIN

   l_serial_num               :=  '1025200453';
   l_acc_nums                 := '8165';
   l_ship_tos                 := '10332';
   l_acc_set := syk_serial_num_details.account_set();
   syk_serial_num_details.get_prod_details(p_serial_num                  => l_serial_num
                                          ,p_acc_nums                    => l_acc_nums
                                          ,p_ship_tos                    => l_ship_tos
                                          ,p_acc_set                     => l_acc_set
                                          ,p_status                      => l_status
                                          );


   Dbms_output.put_line('Status ::' || l_status);
   IF(l_acc_set.count >0) then
   FOR i IN 1 .. l_acc_set.count
   LOOP
   l_acc_set.extend;
      DBMS_OUTPUT.put_line(   'Item_Number:'
                           || l_acc_set(i).item_num||'|'
                           || '   Desc:'
                           || l_acc_set(i).item_desc||'|'
                           || '   Accunt Number:'
                           || l_acc_set(i).acc_num||'|'
                           || '   Ship To:'
                           || l_acc_set(i).ship_to||'|'
                           || '   Bill To:'
                           || l_acc_set(i).bill_to||'|'
                          );
   END LOOP;
   end if;

END;

So...I am having LOTS of trouble trying to identify the proper type for the p_acc_set output. Below is my current C# code:

        OracleConnection conn = getOracleConnection();
        List<AccountSearchResultsDto> ProductInfoList = new List<AccountSearchResultsDto>();
        using (conn)
        {
            conn.Open();

            using (OracleCommand cmd = new OracleCommand("syk_serial_num_details.get_prod_details", conn))
            {

                cmd.CommandType = CommandType.StoredProcedure;

                //ASSIGN PARAMETERS TO BE PASSED 
                OracleParameter param1 = new OracleParameter("p_serial_num", OracleDbType.Varchar2);
                param1.Direction = ParameterDirection.Input;
                param1.Size = 100;
                param1.Value = "1025200453";
                cmd.Parameters.Add(param1);

                OracleParameter param2 = new OracleParameter("p_acc_nums", OracleDbType.Varchar2);
                param2.Direction = ParameterDirection.Input;
                param2.Size = 100;
                param2.Value = "8165";
                cmd.Parameters.Add(param2);

                OracleParameter param3 = new OracleParameter("p_ship_tos", OracleDbType.Varchar2);
                param3.Direction = ParameterDirection.Input;
                param3.Size = 100;
                param3.Value = "10332";
                cmd.Parameters.Add(param3); 


                //PARAMETERS USED TO RETURN RESULT OF PROCEDURE CALL 
                OracleParameter param4 = new OracleParameter("p_acc_set", OracleDbType.Object);
                param4.Direction = ParameterDirection.Output;
                param4.Size = 1;
                cmd.Parameters.Add(param4);

                OracleParameter param5 = new OracleParameter("p_status", OracleDbType.Varchar2);
                param5.Direction = ParameterDirection.Output;
                param5.Size = 300;
                cmd.Parameters.Add(param5); 


                cmd.ExecuteNonQuery();

                if (cmd.Parameters["p_status"].Value.ToString().Equals("SUCCESS"))
                {
                       //Get results from p_acct_set and put values in list
                }



            }
        }

As of now - attempting the above I am getting the following error:

Invalid parameter binding Parameter name: p_acc_set

Should i be using the OracleParameter UdtTypeName reference for the p_acc_set?

I am very new to Oracle Procedure calls so please forgive my inexperience. Any help is appreciated! thanks in advance!!

-R

Answer 1

The difference i spotted for parameter "p_acc_set" and "p_status" compare to others is that they did not assign Size on them please try to assign size on them and should fix your issue

I did not find the MSDN explaining very clearly on OracleParamter.Size property. But i did notice a line in the remarks that says

The line is taken from MSDN remarks :

For bidirectional and output parameters, and return values, you must set the value of Size.

Answer 2

There's the property BindByName of OracleCommand class ( defaulted to false ) to handle this.

You should set it to true before executing the command to avoid that error!

for further informations read this too!!

Edit

Sorry, I didn't notice there was a PL/SQL Nested Table!! I don't think that Oracle supports a bind for that (especially if it contains records instead of simple values).

Associative Arrays, PL/SQL Nested tables and PL/SQL Vararrays are very similar data types so probably here they intend all the three things with the name Associative Arrays.

Using a Nested Table of User defined Types in place of it should solve your problem but it will become very trivial to handle for a newbie ...If so you should redefine the procedure to use the new data type and setting UdtTypeName parameter in the C# code is not the only thing to do.