Question

I have the following set of TYPE, PROCEDURE and Java code. I am able to call the stored procedure successfully but i have to append the objects one after the other. I want the process to be happening at one shot as i am dealing with over 50K+ records. Can anyone please let me know what changes needs to be done so that i can send the entire list at one. The code can be found below.

TYPES: 
    CREATE OR REPLACE TYPE CER_GL_ENTRY_TYPE AS OBJECT
                      (idKey NUMBER(10)  );

    CREATE or REPLACE TYPE CER_GL_ENTRY_TYPE_LIST AS TABLE OF  CER_GL_ENTRY_TYPE;

PROCEDURE:

    CREATE OR REPLACE PROCEDURE GL_PROCESS_BULK_ENTRIES (
       p_array    IN     CER_GL_ENTRY_TYPE_LIST ,p_status      OUT VARCHAR2)
    AS
       v_count      NUMBER(5);
       row_detail   CER_GL_ENTRY_TYPE;
    BEGIN
       --p_arr_int := NEW array_int ();
       --p_arr_int.EXTEND (10);
       --len := p_array.COUNT;
       v_count := 0;

       FOR i IN 1 .. p_array.COUNT
       LOOP
          row_detail := p_array (i);
          DBMS_OUTPUT.put_line('hello');
          DBMS_OUTPUT.put_line (row_detail.idKey);
          --p_arr_int (i) := v_count;
          v_count := v_count + 1;
          p_status := 'true';
       END LOOP;

       DBMS_OUTPUT.put_line (v_count);
       DBMS_OUTPUT.put_line (p_status);
    EXCEPTION
       WHEN OTHERS
       THEN
          -- handle errors here...
          DBMS_OUTPUT.put_line ('Error: ' || SUBSTR (1, 255, SQLERRM));
    END;
    /

Java Bean:

    import java.sql.SQLData;
    import java.sql.SQLException;
    import java.sql.SQLInput;
    import java.sql.SQLOutput;

    public class SampleListenerBean implements SQLData
    {
        private String sql_type="CER_GL_ENTRY_TYPE";

        private int id;

        public SampleListenerBean() {

        }

        public SampleListenerBean(String sqlType, int id) {
            this.sql_type = sqlType;
            this.id = id;
        }




        public int getId() {
            return id;
        }
        public void setId(int id) {
            this.id = id;
        }


        public String getSQLTypeName() throws SQLException {
            return sql_type; 
        }

        public void readSQL(SQLInput stream, String typeName) throws SQLException {
            sql_type = typeName;

            id = stream.readInt();
        }

        public void writeSQL(SQLOutput stream) throws SQLException {
            stream.writeInt(id);
        }
    }

Main class: 

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.List;

import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;

public class StProcExample {



    public static void main(String args[]){
            Connection con=null;
            try{
                 DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver ());
            con = DriverManager.getConnection("jdbc:oracle:thin:@******:1521: TUW1", "*******", "*********");
            String query = "{call GL_PROCESS_BULK_ENTRIES(?,?)}";


            CallableStatement cs = con.prepareCall(query);
            ArrayDescriptor des = ArrayDescriptor.createDescriptor("CER_GL_ENTRY_TYPE_LIST", con);

            List<SampleListenerBean> sampleLst = new ArrayList<SampleListenerBean>();

            SampleListenerBean bean = null;

            for (int i = 0; i < 20; i++) {
                bean = new SampleListenerBean("CER_GL_ENTRY_TYPE",i);
                sampleLst.add(bean);
            }


            SampleListenerBean emp=new SampleListenerBean("TS.TEST_EMP_OBJ",234);
            SampleListenerBean emp1=new SampleListenerBean("TS.TEST_EMP_OBJ",235);
            Object[] employees= new Object[]{emp,emp1};
            Object[] employees= new Object[]{sampleLst};
            ARRAY a = new ARRAY(des, con, employees);
            cs.setObject(1, (Object)a);
            cs.registerOutParameter(2, Types.VARCHAR);
            cs.execute();

            String status = cs.getString(2);

            System.out.print("The status is " + status);
            if (cs != null) {
                cs.close();
             }
            }
            catch(SQLException e){
                e.printStackTrace();
            }


        }

    }

I want is the replacement for the following piece of code

    SampleListenerBean emp=new SampleListenerBean("TS.TEST_EMP_OBJ",234);
    SampleListenerBean emp1=new SampleListenerBean("TS.TEST_EMP_OBJ",235);
    Object[] employees= new Object[]{emp,emp1};

    ARRAY a = new ARRAY(des, con, employees);
    cs.setObject(1, (Object)a);

Instead of setting each object separately, i want to directly use sampleLst instead of the Object array “employees”. When i deal with 50K+ objects i cannot keep adding them to the object[]. i will run into heap problems as well. Can anyone please help me out here?

Answer 1

I would use a simpler table type:

CREATE OR REPLACE TYPE NUM_ARRAY AS TABLE OF NUMBER;

And then somewhat simplify the stored procedure:

CREATE OR REPLACE PROCEDURE GL_PROCESS_BULK_ENTRIES (
   p_array    IN     NUM_ARRAY,
   p_status   OUT    VARCHAR2)
IS
...

You then create an array of Integer that will easily fit in memory:

Integer[] idArray = new Integer[50000];

// fill the array of integers here
for (int i = 0; i < idArray.length; i++)
    idArray[i] = ....;

ARRAY a = new ARRAY(des, con, idArray);
cs.setObject(1, (Object)a);

There’s no need to create any heavy-weight beans just to pass a list of IDs.