//*********************************************************************
//
//                 Copyright (c) 2004-2008 by Teradata Corporation
//                         All Rights Reserved
//
//*********************************************************************
//
//  File:       T20906JD.java
//  Header:     none
//  Purpose:    Demonstrate obtaining table names
//              The program will:
//                -  Connect as user guest/please
//                -  Obtain and display names of all tables available
//                   in all databases
//                -  Disconnect.
//
//  JDBC API: java.sql.Connection, java.sql.DatabaseMetaData,
//            java.sql.DatabaseMetaData.getTables
//
//  Version: Updated for Teradata V2R6
//
//*********************************************************************

import java.sql.*;

public class T20906JD
{
    // 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";

        // Wildcard used for table name search
        String wildcard = "%";

        try
        {
            System.out.println("\n Sample T20906JD: \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 obtains the names of all tables in
                // all databases

                // Use getTables to generate a result set of table names
                // using a wildcard character for the table name.
                // Please note that this method will only return information
                // on databases and tables to which the user has access to.
                // The % character used for the search represents
                // any sequence of zero or more characters; all available
                // table names are expected to be returned.
                // The method has the following parameters:
                // parameter 1: a String object representing a catalog name
                // parameter 2: a String object representing a schema name
                // pattern (database name)
                // parameter 3: a String object representing a table name
                // pattern (table name)
                // parameter 4: a String array representing a list of
                // table types to include
                // Each table description includes the following columns:
                // TABLE_CAT (String)
                // TABLE_SCHEM (String)
                // TABLE_NAME (String)
                // TABLE_TYPE (String)
                // REMARKS (String)
                // Results are ordered by ordered by: TABLE_TYPE,
                // TABLE_SCHEM, TABLE_NAME
                // Please refer to the driver manual for a complete
                // description of this method, its implementations,
                // and return values.

                ResultSet rs = dbmd.getTables(null, null, wildcard, null);
                // Display the returned table names.
                System.out.println(" DISPLAYING ALL TABLE NAMES IN ALL" +
                                   " DATABASES:\n");
                System.out.println(" Database name : Table name");
                System.out.println(" --------------------------");
                while(rs.next())
                {
                    System.out.println(" " + rs.getString("TABLE_SCHEM") +
                                       " : " + rs.getString("TABLE_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 T20906JD 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 T20906JD