//************************************************************************************
//
// Copyright (c) 2006-2008 by Teradata Corporation
// All Rights Reserved
//
// TERADATA CORPORATION CONFIDENTIAL AND TRADE SECRET
//
//************************************************************************************
//
// File: T20003JD.java
// Header: none
// Purpose: Demonstrate how to set up global temporary table, which is
// required for lob updates. Used by T20404 to update lob.
// The program will:
// - Connect as user guest/please
// - Drop global temporary table JdbcLobUpdate if it exists
// - Create global temporary table JdbcLobUpdate with the
// following columns:
// id INTEGER NOT NULL,
// bval BLOB,
// cval CLOB CHARACTER SET UNICODE
// - Disconnect.
//
// JDBC API: java.sql.Connection, java.sql.Statement,
// java.sql.Statement.executeUpdate
//
// Version: Updated for Teradata 12
//
//************************************************************************************
import java.sql.*;
public class T20003JD
{
// 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";
// Statements used in table creation
String sDropTbl = "DROP TABLE JdbcLobUpdate";
String sCreateTbl =
" CREATE GLOBAL TEMPORARY TABLE JdbcLobUpdate("+
" id INTEGER NOT NULL,"+
" bval BLOB,"+
" cval CLOB CHARACTER SET UNICODE)"+
" UNIQUE PRIMARY INDEX upi_JdbcLobUpdate(id)"+
" ON COMMIT PRESERVE ROWS";
try
{
System.out.println(" Sample T20003JD: ");
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. ");
// 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. ");
try
{
// Creating a statement object from an active connection.
Statement stmt = con.createStatement();
System.out.println(" Statement object created. ");
try
{
// Cleanup procedure:
// If the sample table already exists, drop it.
try
{
System.out.println(" Dropping table if present: "
+ sDropTbl);
stmt.executeUpdate(sDropTbl);
System.out.println(" Table dropped.");
}
catch (SQLException ex)
{
// If the table did not exist, no drop is required.
// Ignore the raised "no table present" exception by
// printing out the error message and swallowing the
// exception.
System.out.println(" Drop table exception ignored: "
+ ex);
System.out.println(" Table could not be dropped." +
" Execution will continue...");
}
// Create the global temporary table
System.out.println(" Creating table: " + sCreateTbl);
stmt.executeUpdate(sCreateTbl);
System.out.println(" Sample table created. ");
}
finally
{
// Close the statement
stmt.close();
System.out.println(" Statement object closed. ");
}
}
finally
{
// Close the connection
System.out.println(" Closing connection to Teradata...");
con.close();
System.out.println(" Connection to Teradata closed. ");
}
System.out.println(" Sample T20003JD finished. ");
}
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 T20003JD
|
|
|
|