Calling a storedprocedure returning refcursor of xmltype

Question

Hi,
I'm having issues with stored procedure, returning a refcursor of xmltypes. Most of the examples in the docs(http://docs.oracle.com/html/E10927_01/featXML.htm#i1012109) are always a direct query and I have yet to see one using a stored procedure.
Here's a repro script:
Register an xsd:
BEGIN
dbms_xmlschema.registerschema('http://www.testing.com/person.xsd',
'<?xml version = "1.0" encoding = "utf-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  elementFormDefault="qualified" attributeFormDefault="unqualified">
  <xs:element name="person">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="first_name" type="xs:string"/>
        <xs:element name="last_name" type="xs:string"/>
        <xs:element name="gender">
          <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="male"/>
              <xs:enumeration value="female"/>
            </xs:restriction>
          </xs:simpleType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>',
LOCAL => FALSE, -- local
GENTYPES => FALSE, -- generate object types
GENBEAN => FALSE, -- no java beans
GENTABLES => TRUE, -- generate object tables
FORCE => FALSE,
options => dbms_xmlschema.register_binaryxml,
OWNER => USER );
END;
--create a array of int type
CREATE OR REPLACE
type int_array_type as table of number;
-- Create the table
CREATE TABLE person
    ID NUMBER,
    xml_document XMLTYPE
  xmltype column xml_document STORE AS BINARY XML XMLSCHEMA "http://www.testing.com/person.xsd" element "person";
-- insert some data
INSERT INTO person (ID, xml_document)
VALUES (1, XMLTYPE ('<?xml version="1.0" encoding="utf-8"?>
<person xsi:noNamespaceSchemaLocation="http://www.testing.com/person.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <first_name>John</first_name>
  <last_name>Doe</last_name>
  <gender>male</gender>
</person>'));
INSERT INTO person (ID, xml_document)
VALUES (2, XMLTYPE ('<?xml version="1.0" encoding="utf-8"?>
<person xsi:noNamespaceSchemaLocation="http://www.testing.com/person.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <first_name>Jane</first_name>
  <last_name>Doe</last_name>
  <gender>female</gender>
</person>'));
Create the Package
create or replace
package test_pkg as
  TYPE refcursor IS REF CURSOR;
  type t_id_array is table of number index by binary_integer;
    -- user procs
  procedure udp_get_personlist (
      p_ids IN t_id_array,
      p_resultset out refcursor );
end test_pkg;
create or replace
package body test_pkg as
  procedure udp_get_personlist (
      p_ids IN t_id_array,
      p_resultset out refcursor ) IS
      v_int_array_type int_array_type := int_array_type();
  begin
     FOR i IN 1..p_ids.COUNT LOOP
      v_int_array_type.extend(1);
      v_int_array_type(i) := p_ids(i);     
    END LOOP;   
    OPEN p_resultset FOR
    SELECT E.XML_DOCUMENT AS "person" FROM person E
    WHERE e.ID IN ( SELECT t.COLUMN_VALUE FROM TABLE ( v_int_array_type ) t );
  end udp_get_personlist;
end test_pkg;And here is my ODP.NET code
using (var con = new OracleConnection("<your oracle connection>"))
     using (var cmd = con.CreateCommand())
          cmd.CommandText = "test_pkg.udp_get_personlist";
          cmd.CommandType = CommandType.StoredProcedure;
          int[] ids = new int[] { 1, 2 };
          OracleParameter param1 = cmd.Parameters.Add("p_ids", OracleDbType.Int32);
          OracleParameter param2 = cmd.Parameters.Add("p_resultset", OracleDbType.RefCursor, ParameterDirection.Output);
          param1.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
          param1.Value = ids;
          param1.Size = ids.Length;
          param1.ArrayBindSize = new int[] { 4, 4 };
          // Setup the ArrayBind Status for param2
          param1.ArrayBindStatus = new OracleParameterStatus[1] { OracleParameterStatus.Success }; //, OracleParameterStatus.Success };
          try
               cmd.XmlQueryProperties.MaxRows = 1;
               con.Open();
               XmlReader r = cmd.ExecuteXmlReader(); // this always generates invalidoperationexception
               // do something with the result
          catch (Exception)
               throw;
          // Close and Dispose OracleConnection object
          con.Close();
          con.Dispose();
}     Server/Tools information:
Oracle is Standard - Oracle Database 11g Release 11.2.0.1.0 running on Windows Server 2003 Std
ODP.NET (ie Oracle.DataAccess.DLL is 4.112.3.0);
Visual Studio 2010 Ultimate SP1
Any pointers in what I'm (obviously doing wrong) is greatly appreciated...
thanks
Edited by: 947266 on Sep 10, 2012 9:46 AM

Answer 1

Was able to make it work
using (var con = new OracleConnection("<your oracle connection>"))
     using (var cmd = con.CreateCommand())
          cmd.CommandText = "test_pkg.udp_get_personlist";
          cmd.CommandType = CommandType.StoredProcedure;
          int[] ids = new int[] { 1, 2 };
          OracleParameter param1 = cmd.Parameters.Add("p_ids", OracleDbType.Int32);
          OracleParameter param2 = cmd.Parameters.Add("p_resultset", OracleDbType.RefCursor, ParameterDirection.Output);
          param1.CollectionType = OracleCollectionType.PLSQLAssociativeArray;
          param1.Value = ids;
          param1.Size = ids.Length;
          param1.ArrayBindSize = new int[] { 4, 4 };
          // Setup the ArrayBind Status for param2
          param1.ArrayBindStatus = new OracleParameterStatus[1] { OracleParameterStatus.Success }; //, OracleParameterStatus.Success };
          try
               cmd.XmlQueryProperties.MaxRows = 1;
               con.Open();
               int i = cmd.ExecuteNonQuery();
                        OracleRefCursor curs = (OracleRefCursor)cmd.Parameters["p_resultset"].Value;
                        OracleDataReader dr = curs.GetDataReader();
                        while (dr.Read())
                            Console.WriteLine(dr[0].ToString()); 
          catch (Exception)
               throw;
          // Close and Dispose OracleConnection object
          con.Close();
          con.Dispose();
}