Oracle user defined types (udt) inside package mapping with .NET custom types

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C#

.NET

Oracle

ODP.NET

UDT

I am mapping Oracle user defined types to .Net custom types by Oracle Data access unmanaged assembly.
I have followed the article https://www.codeproject.com/Articles/1261430/Calling-Oracles-Stored-Procedures-and-Mapping-User

I had applied simple scenarios.

1. Created Oracle UDT at schema level i.e.

CREATE OR REPLACE  TYPE STUDENT_TYP IS OBJECT (
STUDENT_ID NUMBER,
STUDENT_NAME VARCHAR(20),
ADDRESS VARCHAR(20),
AGE NUMBER,
BIRTH_DATE DATE
);

CREATE OR REPLACE  TYPE STUDENT_TYP_TBL IS TABLE OF STUDENT_TYP;

and here is the Procedure GET_ALL_STUDENTS body

PROCEDURE GET_ALL_STUDENTS(P_STUDENTS OUT STUDENT_TYP_TBL)
AS
BEGIN

  SELECT *
    BULK COLLECT INTO P_STUDENTS   
    FROM 
    (
    SELECT  STUDENT_TYP(s.student_id,
            s.student_name,
            s.address,
            s.age,
            s.birth_date)
    FROM
    student s) ; 
END;

Above example is working fine. Above scenario just to explain there is no issue in implementation

2. Now I defined types inside a package e.g.

CREATE OR REPLACE PACKAGE STUDENT_PKG 
AS

TYPE  PHONE_TYP_RC IS RECORD (
PHONE_ID  STUDENT_PHONE.PHONE_ID%TYPE,
PHONE_TYPE STUDENT_PHONE.PHONE_TYPE%TYPE,
PHONE_NUMBER STUDENT_PHONE.PHONE_NUMBER%TYPE
);

TYPE PHONE_RC_TBL IS TABLE OF PHONE_TYP_RC;

PROCEDURE GET_ALL_PHONES(P_PHONES_TBL OUT STUDENT_PKG.PHONE_RC_TBL);

END;

Following is STUDENT_PKG body

create or replace PACKAGE BODY STUDENT_PKG 
AS

PROCEDURE GET_ALL_PHONES(P_PHONES_TBL OUT STUDENT_PKG.PHONE_RC_TBL)
IS
BEGIN

SELECT PH.PHONE_ID, PH.PHONE_TYPE, PH.PHONE_NUMBER
 BULK COLLECT INTO P_PHONES_TBL
FROM STUDENT_PHONE PH;

-- END OF GET_ALL_PHONES
END;

--END OF PACKAGE BODY
END;

When I add Oracle parameter with all information. I received an Oracle Exception

"OCI-22303: type \"STUDENT_PKG\".\"PHONE_RC_TBL\" not found"

I had already defined the Oracle custom mapping with name STUDENT_PKG.PHONE_RC_TBL
I already tried with following names

- STUDENT_PKG.PHONE_RC_TBL
- STUDENT_PKG
- PHONE_RC_TBL

When I execute OracleCommandBuilder.DeriveParameters(command); to get the Command text parameters I am receiving the following information

Parameter Name: P_PHONES_TBL
OracleDbType: Array
OracleDbTypeEx: Array
UdtTypeName: KAMI.STUDENT_PKG
DbType: Object


and when i execute I get following exception

OCI-22303: type "KAMI"."STUDENT_PKG" not found

This means there is something tricky to handle the package's udt mapping to .Net class.

Here is my definition of .Net custom class for *P_PHONES_TBL* Parmeter

public abstract class CustomTypeBase<T> :
     IOracleCustomType, IOracleCustomTypeFactory, INullable where T : CustomTypeBase<T>, new()
    {
        private bool _isNull;
        public bool IsNull
        {
            get { return this._isNull; }
        }

        public static T Null
        {
            get { return new T { _isNull = true }; }
        }

        public IOracleCustomType CreateObject()
        {
            return new T();
        }

        public abstract void FromCustomObject(OracleConnection con, IntPtr pUdt);
        public abstract void ToCustomObject(OracleConnection con, IntPtr pUdt);
    }

    public abstract class CustomCollectionTypeBase<TType, TValue> : CustomTypeBase<TType>,
                   IOracleArrayTypeFactory where TType : CustomTypeBase<TType>, new()
    {
        [OracleArrayMapping()]
        public TValue[] Values;

        public override void FromCustomObject(OracleConnection connection, IntPtr pointerUdt)
        {
            OracleUdt.SetValue(connection, pointerUdt, 0, Values);
        }

        public override void ToCustomObject(OracleConnection connection, IntPtr pointerUdt)
        {
            Values = (TValue[])OracleUdt.GetValue(connection, pointerUdt, 0);
        }

        public Array CreateArray(int elementCount)
        {
            return new TValue[elementCount];
        }

        public Array CreateStatusArray(int elementCount)
        {
            return new OracleUdtStatus[elementCount];
        }
    }

[OracleCustomTypeMapping("STUDENT_PKG.PHONE_TYP_RC")]
    public class PhoneRecord : CustomTypeBase<PhoneRecord>
    {
        [OracleObjectMapping("PHONE_ID")]
        public int PhoneId { get; set; }

        [OracleObjectMapping("PHONE_TYPE")]
        public string PhoneTYpe { get; set; }

        [OracleObjectMapping("PHONE_NUMBER")]
        public string PhoneNumber { get; set; }

        public override void FromCustomObject(OracleConnection con, IntPtr pUdt)
        {
            OracleUdt.SetValue(con, pUdt, "PHONE_ID", PhoneId);
            OracleUdt.SetValue(con, pUdt, "PHONE_TYPE", PhoneTYpe);
            OracleUdt.SetValue(con, pUdt, "PHONE_NUMBER", PhoneNumber);
        }

        public override void ToCustomObject(OracleConnection con, IntPtr pUdt)
        {
            PhoneId = (int)OracleUdt.GetValue(con, pUdt, "PHONE_ID");
            PhoneTYpe = OracleUdt.GetValue(con, pUdt, "PHONE_TYPE").ToString();
            PhoneNumber = OracleUdt.GetValue(con, pUdt, "PHONE_NUMBER").ToString();
        }
    }

    [OracleCustomTypeMapping("STUDENT_PKG.PHONE_RC_TBL")]
    public class PhoneTable : CustomCollectionTypeBase<PhoneTable, PhoneRecord>
    {

    }

and here is Store procedure call

OracleCommand command = new OracleCommand("KAMI.STUDENT_PKG.GET_ALL_PHONES", connection);
            command.CommandType = System.Data.CommandType.StoredProcedure;
            try
            {
                //  OracleCommandBuilder.DeriveParameters(command);
                OracleParameter param = new OracleParameter()
                {
                    ParameterName = "P_PHONES_TBL",
                    Direction = System.Data.ParameterDirection.Output,
                    OracleDbType = OracleDbType.Object,
                    OracleDbTypeEx = OracleDbType.Object,
                    UdtTypeName = "STUDENT_PKG.PHONE_RC_TBL",
                };
                command.Parameters.Add(param);

                command.ExecuteNonQuery();
            }
            catch (Exception ex)
            {
            }

Please anyone experienced the same and how to resolve the issue

What I have tried:

1. I mapped Schema level UDT with custom types and it worked for me
2. I defined types inside Oracle package and tried to mapped with custom types.
I received following issues.

By adding parameter information to Oracle command here is the error.

"OCI-22303: type \"STUDENT_PKG\".\"PHONE_RC_TBL\" not found"

When using

OracleCommandBuilder.DeriveParameters(command);

Here is error

OCI-22303: type "KAMI"."STUDENT_PKG" not found

I tried to create OracleCustomTypeMapping with following names

- STUDENT_PKG.PHONE_RC_TBL
- STUDENT_PKG
- PHONE_RC_TBL