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deepakgrewal-6294 asked LimitlessTechnology-0326 answered

Teradata connection in SSIS script task c#

I have to use a script task to connect to Teradata ADO.net connection which I have already created at project level.
In my script task , I need to connect to teradata to run some queries and do few modifications on the data i get.


Could someone guide me how i could connect to teradata within script task


Any help is appreciated.

windows-server-nano
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1 Answer

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LimitlessTechnology-0326 answered

Hi Deepakgrewal-6294,

Firstly, install the .NET Data Provider for Teradata.

Step 1 Create a Console Project

Name it as’' ‘ConsoleApps.Teradata’.

Add reference to library ‘.NET Data Provider for Teradata'

The version on my PC is 14.11.0.1. You can always download the latest version from Teradata official site.

Step 2 Create a method to read data from Teradata
Remember to import the namespace ‘Teradata.Client.Provider’.

using System;
using Teradata.Client.Provider;

namespace ConsoleApps.Teradata
{
class Program
{
static void Main(string[] args)
{
DisplayEmployeeInfoFromTeraData();
Console.ReadLine();

     }

     private static void DisplayEmployeeInfoFromTeraData()
     {
     }
 }

}


Step 3 Implement the method
Create connection, command and adapter objects to read data in a standard ADO.NET way.

The sample code will be similar to what I’ve provided here:

private static void DisplayEmployeeInfoFromTeraData()
{
var employeeData = new DataSet();

         var connectionString = "Data Source=***************;User ID=dbc;Password=dbc;";
         using (var connection = new TdConnection(connectionString))
         {
             var sql = @"SELECT Emp.EmployeeID,
 Emp.EmployeeName,
    
 CASE
     WHEN  Emp.Gendar = 'M' THEN 'Dear MR ' || Emp.EmployeeName ELSE 'Dear MS ' ||Emp.EmployeeName
 END AS ""Employee Salutation""
 FROM TD_MS_SAMPLE_DB.Employee Emp; ";
             var command = new TdCommand(sql, connection);
             var adapter = new TdDataAdapter(command);
             connection.Open();
             adapter.Fill(employeeData);
             connection.Close();

         }

         DisplayEmployeeData(employeeData);
     }

     private static void DisplayEmployeeData(DataSet employeeData)
     {
         if (employeeData.Tables != null && employeeData.Tables.Count > 0)
         {
             var employees = employeeData.Tables[0];
             var columnCount = employees.Columns.Count;
             foreach (DataRow row in employees.Rows)
             {
                 for (int i = 0; i < columnCount; i++)
                 {
                     var col = employees.Columns[i];
                     Console.WriteLine("{0} = {1}", col.ColumnName, row[i]);   
                 }
                 Console.WriteLine();
             }
             Console.WriteLine("{0} Records", employees.Rows.Count);
         }
     }

In this sample, I am connecting to a local Teradata virtual machine with address as ‘192.168.121.128’. One thing to notice is that all the class names are prefixed with ‘Td’, e.g. Connection class is named TdConnection, Command class is named TdCommand and so forth.

Step 4 The result will be displayed in the console.

Summary

Teradata is used in many data warehousing projects. If you really want to use it in your OLTP projects, you can connect to it via .NET Data Provider for Teradata or ODBC Teradata provider. The syntax will be similar as connecting to SQL Server, Oracle or any other databases supported by ADO.NET.


I hope this answers your question.



--If the reply is helpful, please Upvote and Accept as answer--

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