Example: Distinct types

/////////////////////////////////////////
// This example program shows examples of 
// various common tasks that can be done
// with distinct types.
/////////////////////////////////////////
import java.sql.*;

public class Distinct {
    public static void main(String[] args) 
    throws SQLException 
    {
        // Register the native JDBC driver.
        try {
            Class.forName("com.ibm.db2.jdbc.app.DB2Driver");
        } catch (Exception e) {
            System.exit(1);  // Setup error.
        }

        Connection c = DriverManager.getConnection("jdbc:db2:*local");    
        Statement s = c.createStatement();

        // Clean up any old runs.
        try {
            s.executeUpdate("DROP TABLE CUJOSQL.SERIALNOS");
        } catch (SQLException e) {
            // Ignore it and assume the table did not exist.
        }

        try {
            s.executeUpdate("DROP DISTINCT TYPE CUJOSQL.SSN");
        } catch (SQLException e) {
            // Ignore it and assume the table did not exist.
        }

        // Create the type, create the table, and insert a value.
        s.executeUpdate("CREATE DISTINCT TYPE CUJOSQL.SSN AS CHAR(9)");
        s.executeUpdate("CREATE TABLE CUJOSQL.SERIALNOS (COL1 CUJOSQL.SSN)");

        PreparedStatement ps = c.prepareStatement("INSERT INTO CUJOSQL.SERIALNOS VALUES(?)");
        ps.setString(1, "399924563");
        ps.executeUpdate();
        ps.close();

        // You can obtain details about the types available with new metadata in 
        // JDBC 2.0
        DatabaseMetaData dmd = c.getMetaData();

        int types[] = new int[1];
        types[0] = java.sql.Types.DISTINCT;

        ResultSet rs = dmd.getUDTs(null, "CUJOSQL", "SSN", types);
        rs.next();
        System.out.println("Type name " + rs.getString(3) + 
                           " has type " + rs.getString(4));
                           

        // Access the data you have inserted.
        rs = s.executeQuery("SELECT COL1 FROM CUJOSQL.SERIALNOS");
        rs.next();
        System.out.println("The SSN is " + rs.getString(1));

        c.close(); // Connection close also closes stmt and rs.
    }
}