//*********************************************************************
//
//                 Copyright (c) 2004-2008 by Teradata Corporation
//                         All Rights Reserved
//
//*********************************************************************
//
//  File:       T20902JD.java
//  Header:     none
//  Purpose:    Demonstrate obtaining a list of supported SQL data types
//              The program will:
//                -  Connect as user guest/please
//                -  Obtain and display a list of all SQL data types
//                   supported by the database
//                -  Disconnect.
//
//  JDBC API: java.sql.Connection, java.sql.DatabaseMetaData,
//            java.sql.DatabaseMetaData.getTypeInfo
//
//  Version: Updated for Teradata V2R6
//
//*********************************************************************

import java.sql.*;

public class T20902JD
{
    // Name of the user able to create, drop, and manipulate tables
    public static String sUser = "guest";
    public static String sPassword = "please";

    public static void main(String args[])
    throws ClassNotFoundException
    {
        // Creation of URL to be passed to the JDBC driver
        String url = "jdbc:teradata://whomooz/TMODE=ANSI,CHARSET=UTF8";

        try
        {
            System.out.println("\n Sample T20902JD: \n");
            System.out.println(" Looking for the Teradata JDBC driver... ");
            // Loading the Teradata JDBC driver
            Class.forName("com.teradata.jdbc.TeraDriver");
            System.out.println(" JDBC driver loaded. \n");

            // Attempting to connect to Teradata
            System.out.println(" Attempting to connect to Teradata via" +
                               " the JDBC driver...");

            // Creating a connection object
            Connection con = DriverManager.getConnection(url, sUser, sPassword);
            System.out.println(" User " + sUser + " connected.");
            System.out.println(" Connection to Teradata established. \n");

            try
            {
                // Creating a DatabaseMetaData object from an active
                // connection.
                DatabaseMetaData dbmd = con.getMetaData();
                System.out.println(" DatabaseMetaData object created. \n");

                // The following code will obtain a description of all
                // SQL datatypes supported by this database

                // Retrieve supported types descriptions
                ResultSet rs = dbmd.getTypeInfo();

                // Results are ordered by DATA_TYPE and then by how closely
                // the data type maps to the corresponding JDBC SQL type.
                // Each type description has the following 18 columns:
                // TYPE_NAME (String)
                // DATA_TYPE (short)
                // PRECISION (int)
                // LITERAL_PREFIX (String)
                // LITERAL_SUFFIX (String)
                // CREATE_PARAMS (String)
                // NULLABLE (short)
                // CASE_SENSITIVE (boolean)
                // SEARCHABLE (short)
                // UNSIGNED_ATTRIBUTE (boolean)
                // FIXED_PREC_SCALE (boolean)
                // AUTO_INCREMENT (boolean)
                // LOCAL_TYPE_NAME (String)
                // MINIMUM_SCALE (short)
                // MAXIMUM_SCALE (short)
                // SQL_DATA_TYPE (int)
                // SQL_DATETIME_SUB (int)
                // NUM_PREC_RADIX (int)
                // Please refer to the driver manual for a complete
                // description of methods, their implementations, and return
                // values.
                // Only the name of the supported types will be displayed,
                // all other available information can be retrieved in a
                // similar manner using the ResultSet data retrieval methods.

                // Display the supported types
                System.out.println(" DISPLAYING SUPPORTED SQL DATA TYPES:\n");
                while(rs.next())
                {
                    System.out.println(" " + rs.getString("TYPE_NAME"));
                }
            }
            finally
            {
                // Close the connection
                System.out.println("\n Closing connection to Teradata...");
                con.close();
                System.out.println(" Connection to Teradata closed. \n");
            }

            System.out.println(" Sample T20902JD finished. \n");
        }
        catch (SQLException ex)
        {
            // A SQLException was generated.  Catch it and display
            // the error information.
            // Note that there could be multiple error objects chained
            // together.
            System.out.println();
            System.out.println("*** SQLException caught ***");

            while (ex != null)
            {
                System.out.println(" Error code: " + ex.getErrorCode());
                System.out.println(" SQL State: " + ex.getSQLState());
                System.out.println(" Message: " + ex.getMessage());
                ex.printStackTrace();
                System.out.println();
                ex = ex.getNextException();
            }

            throw new IllegalStateException ("Sample failed.") ;
        }
    } // End main
} // End class T20902JD