Example: Create a procedure with multiple ResultSets

import java.sql.*;
import java.util.Properties;

public class CallableStatementExample1 {

    public static void main(java.lang.String[] args) {

        // Register the Native JDBC driver.  If we cannot
        // register the driver, the test cannot continue.
        try {
            Class.forName("com.ibm.db2.jdbc.app.DB2Driver");

            // Create the connection properties
            Properties properties = new Properties ();
            properties.put ("user", "userid");
            properties.put ("password", "password");

            // Connect to the local iSeries database
            Connection c = DriverManager.getConnection("jdbc:db2://*local", properties);

            Statement s = c.createStatement();

            // Create a procedure with multiple ResultSets.
            String sql = "CREATE PROCEDURE MYLIBRARY.SQLSPEX1 " +
                         "RESULT SET 2 LANGUAGE SQL READS SQL DATA SPECIFIC MYLIBRARY.SQLSPEX1 " +
                         "EX1: BEGIN " +
                         "   DECLARE C1 CURSOR FOR SELECT * FROM QSYS2.SYSPROCS " +
                         "               WHERE SPECIFIC_SCHEMA = 'MYLIBRARY';  " +
                         "   DECLARE C2 CURSOR FOR SELECT * FROM QSYS2.SYSPARMS  " +
                         "               WHERE SPECIFIC_SCHEMA = 'MYLIBRARY';  " +
                         "   OPEN C1; " +
                         "   OPEN C2; " +
                         "   SET RESULT SETS CURSOR C1, CURSOR C2; " +
                         "END EX1 ";

            try {
                s.executeUpdate(sql);
                } catch (SQLException e) {
                // NOTE:  We are ignoring the error here.  We are making
                //        the assumption that the only reason this fails
                //        is because the procedure already exists. Other
                //        reasons that it could fail are because the C compiler
                //        is not found to compile the procedure or because
                //        collection MYLIBRARY does not exist on the system.
            }
            s.close();

            // Now use JDBC to run the procedure and get the results back. In
            // this case we are going to get information about 'MYLIBRARY's stored
            // procedures (which is also where we created this procedure, thereby
            // ensuring that there is something to get.
            CallableStatement cs = c.prepareCall("CALL MYLIBRARY.SQLSPEX1");

            ResultSet rs = cs.executeQuery();

            // We now have the first ResultSet object that the stored procedure
            // left open.  Use it.
            int i = 1;
            while (rs.next()) {
                System.out.println("MYLIBRARY stored procedure
                                   " + i + " is " + rs.getString(1) + "." +
                                   rs.getString(2));
                i++;

            }
            System.out.println("");


            // Now get the next ResultSet object from the system - the previous
            // one is automatically closed.
            if (!cs.getMoreResults()) {
                System.out.println("Something went wrong.  There should have
                                    been another ResultSet, exiting.");
                System.exit(0);
            }
            rs = cs.getResultSet();

             // We now have the second ResultSet object that the stored procedure
            // left open.  Use that one.
            i = 1;
            while (rs.next()) {
                System.out.println("MYLIBRARY procedure " + rs.getString(1)
                                    + "." + rs.getString(2) +
                                   " parameter:  " + rs.getInt(3) + " direction:
                                   " + rs.getString(4) +
                                   " data type: " + rs.getString(5));
                i++;

            }

            if (i == 1) {
                System.out.println("None of the stored procedures have any parameters.");
            }


            if (cs.getMoreResults()) {
                System.out.println("Something went wrong,
                                    there should not be another ResultSet.");
                System.exit(0);
            }

            cs.close();  // close the CallableStatement object
            c.close();   // close the Connection object.

        } catch (Exception e) {
            System.out.println("Something failed..");
            System.out.println("Reason: " + e.getMessage());
            e.printStackTrace();
        }
    }
}