//************************************************************************************
//
// Copyright (c) 2006-2008 by Teradata Corporation
// All Rights Reserved
//
// TERADATA CORPORATION CONFIDENTIAL AND TRADE SECRET
//
//************************************************************************************
//
// File: T20606JD.java
// Header: none
// Purpose: Demonstrate basic Teradata SQL using the JDBC API by
// creating/executing a stored procedure and retrieving
// dynamic result sets.
// The program will:
// - Connect as user guest/please
// - Create a stored procedure
// - Execute the stored procedure
// - Obtain and display the dynamic result sets
// - Disconnect.
//
// JDBC API: java.sql.Connection, java.sql.Statement,
// java.sql.Statement.executeUpdate,
// java.sql.CallableStatement,
// java.sql.CallableStatement.setString,
// java.sql.CallableStatement.executeQuery
//
// Version: Updated for Teradata Database 12
//
//************************************************************************************
import java.sql.*;
public class T20606JD
{
// 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";
// Stored procedure creation command
String sProcedure = "REPLACE PROCEDURE getDeptEmployees"
+"(IN empDept VARCHAR(30)) "
+"DYNAMIC RESULT SETS 1 "
+"BEGIN "
+" DECLARE cur1 CURSOR WITH RETURN ONLY FOR "
+" SELECT empID, empName, empJob FROM employee2"
+" WHERE empDept = :empDept ORDER BY empID; "
+" OPEN cur1; "
+"END;";
String sCall = "{CALL getDeptEmployees(?)}";
String sDept = "Human Resources";
try
{
System.out.println(" Sample T20606JD: ");
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
{
System.out.println(" Attempting to create a procedure : ");
System.out.println(" "+sProcedure);
// Sending the procedure creation DDL request to the
// database, replacing any old implementations, if present
stmt.executeUpdate(sProcedure);
// If no errors occured...
System.out.println(" Procedure created successfully.");
// The CallableStatement object represents a precompiled
// SQL statement. It provides methods for setting up its
// IN and OUT parameters, and methods for executing the
// call to a stored procedure. Please refer to the JAVA API
// or the supporting driver documentation for a complete
// list of methods, their implementations, and
// return values.
// Creating a CallableStatement object for calling the
// database stored procedure and preparing the callable
// statement for execution
CallableStatement cStmt = con.prepareCall(sCall);
// Setting input parameter value
cStmt.setString(1, sDept);
System.out.println(" Calling the procedure with '"
+ sDept + "' ...");
// Making a procedure call, creating a result set object
ResultSet rs = cStmt.executeQuery();
// Displaying procedure call result, please refer to the
// driver manual for a full list of data retrieval methods
System.out.println(" Call successful.");
// Extract and display dynamic result set data
System.out.println();
System.out.print(" DISPLAYING EMPLOYEES FOR DEPARTMENT: ");
System.out.println(sDept);
System.out.print(" --------------------------");
System.out.println("--------------------------");
int rowCount = 0; // result set row counter
int numData; // placeholder for integer data
String charData; // placeholder for character data
// iterate through all returned rows and display them
while (rs.next())
{
rowCount++; // increment retrieved row counter
System.out.println();
// retrieve and display first column value
numData = rs.getInt(1);
System.out.println(" Employee ID: " + numData);
// retrieve and display second column value
charData = rs.getString(2);
System.out.println(" Name: " + charData);
// retrieve and display third column value
charData = rs.getString(3);
System.out.println(" Job Description: " + charData);
}
System.out.println(" " + rowCount + " Row(s) returned.");
}
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 T20606JD 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 T20606JD
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