SQL table type - How to retrieve in Java?

Question

Hello,
I need to return a SQL object to Java from a PL/SQL function.
In PL/SQL, sample code to create the scalar types, function and calling script would be:
CREATE OR REPLACE TYPE tMessage AS OBJECT (tType CHAR(20), tText VARCHAR2 (400));
CREATE OR REPLACE TYPE tMessage_Table AS TABLE OF tMessage;
CREATE OR REPLACE FUNCTION Return_Message RETURN tMessage_Table AS
vTable tMessage_Table;
BEGIN
vTable := tMessage_Table(NULL);
vTable.Extend(1);
vTable(1) := tMessage ('Header', 'Business Rule');
vTable.Extend(1);
vTable(2) := tMessage ('Phn', '9053098461');
-- Output the data to reporting caller
RETURN vTable;
END Return_Message;
DECLARE
vTmp_Track tMessage_Table;
BEGIN
vTmp_Track := Return_Message;
FOR i IN 1..vTmp_Track.Count LOOP
DBMS_OUTPUT.PUT_LINE (vTmp_Track(i).tType);
DBMS_OUTPUT.PUT_LINE (vTmp_Track(i).tText);
DBMS_OUTPUT.PUT_LINE (' ');
END LOOP;
END;
Is there a way in Java to declare and retrieve an object of type tMessage_Table?
The only other way I can think of doing this would be to create a table and a ref cursor to browse over it, which I can read back from Java.
Thank you.

Answer 1

25266,
Following code was executed using JDK 1.4.2_07, Oracle 9i (9.2.0.4) database, and "ojdbc14.jar" JDBC (thin) driver:
[Note that I used your "type" definitions and PL/SQL function.]
import java.sql.Array;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Struct;
import java.sql.Types;
import java.util.Arrays;
public class SqlStruc {
  public static void main(String[] args) {
    CallableStatement cs = null;
    Connection dbConn = null;
    String url = "jdbc:oracle:thin:scott/tiger@host:1526:orcl";
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver");
      dbConn = DriverManager.getConnection(url);
      cs = dbConn.prepareCall("{? = call RETURN_MESSAGE()}");
      cs.registerOutParameter(1, Types.ARRAY, "T_MSG_TBL");
      cs.execute();
      Object obj = cs.getObject(1);
      System.out.println(obj);
      if (obj != null) {
        System.out.println("Class: " + obj.getClass().getName());
      Array arr = (Array) obj;
      Object[] objArr = (Object[]) arr.getArray();
      for (int i = 0; i < objArr.length; i++) {
        Struct struct = (Struct) objArr;
Object[] attrs = struct.getAttributes();
System.out.println(Arrays.asList(attrs));
catch (Exception x) {
System.err.println("SqlStruc: Exception caught.");
x.printStackTrace();
finally {
if (cs != null) {
try {
cs.close();
catch (Exception x) {
System.err.println("Failed to close statement.");
x.printStackTrace();
if (dbConn != null) {
try {
dbConn.close();
catch (Exception x) {
System.err.println("Failed to close database connection.");
x.printStackTrace();
And results were:
oracle.sql.ARRAY@166a22b
Class: oracle.sql.ARRAY
[Header              , Business Rule]
[Phn                 , 9053098461]Good Luck,
Avi.