DB2Script Class

In This Topic

Syntax
Remarks
Example
Inheritance Hierarchy
See Also

Serves to execute series of SQL statements separated by special symbols.

Syntax

Visual Basic
C#

public class DB2Script : Devart.Common.DbScript, System.ComponentModel.IComponent, System.IDisposable

'Declaration
 
Public Class DB2Script 
   Inherits Devart.Common.DbScript
   Implements System.ComponentModel.IComponent, System.IDisposable

Remarks

Often it is necessary to execute several SQL statements one by one. It can be performed by using a lot of components such as DB2Command. Usually it isn't a good solution. With only one DB2Script component you can execute several SQL statements as one. This sequence of statements is named script. To separate individual statements use semicolon (;) symbol.

When DB2Script encounters a BEGIN keyword in the script, it looks for a slash symbol "/" in the first position of some consecutive line. Everything between the BEGIN and the slash is considered single block. Usually the slash is placed after the line containing END keyword. You do not have to place slash after nested BEGIN...END block.

Example

This sample demonstrates how to execute script and retrieve information about execution flow using Progress and Error events.

csharp

[STAThread]
static void Main(string[] args)
{
string script =

  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');"+
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');"+
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');"+
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');"+
  "SELECT * FROM DEPT";
      DB2Connection db2Conn = new DB2Connection(
          "user id=db2admin;server=db2;database=SAMPLE;");
      DB2Script db2Script = new DB2Script(script,db2Conn);
      db2Script.Progress += new Devart.Common.ScriptProgressEventHandler(OnProgress);
      db2Script.Error += new Devart.Common.ScriptErrorEventHandler(OnError);
      db2Conn.Open();
      db2Script.Execute();
      db2Conn.Close();
    }

static void OnProgress(object sender, Devart.Common.ScriptProgressEventArgs e)
{
  Console.WriteLine(e.Text);
  Console.WriteLine("  Successfully executed.");
}

static void OnError(object sender, Devart.Common.ScriptErrorEventArgs e)
{
  e.Ignore = true;
  Console.WriteLine(e.Text);
  Console.WriteLine("  Failed.");
}

Visual Basic

Module Module1

  Friend WithEvents db2Script As Devart.Data.DB2.DB2Script

  Sub Main()
    Dim script As String = _

  "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');" + _
  "INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS');" + _
  "INSERT INTO DEPT VALUES (30,'SALES','CHICAGO');" + _
  "INSERT INTO DEPT VALUES (40,'OPERATIONS','BOSTON');" + _
  "SELECT * FROM DEPT"
    Dim db2Conn As DB2Connection = New DB2Connection( _
        "user id=db2admin;server=db2;database=SAMPLE;")
    db2Script = New DB2Script(script, db2Conn)
    db2Conn.Open()
    db2Script.Execute()
    db2Conn.Close()
    Console.ReadLine()
  End Sub

  Sub OnProgress(ByVal sender As Object, ByVal e As Devart.Common.ScriptProgressEventArgs) Handles db2Script.Progress
    Console.WriteLine(e.Text)
    Console.WriteLine("  Successfully executed.")
  End Sub

  Sub OnError(ByVal sender As Object, ByVal e As Devart.Common.ScriptErrorEventArgs) Handles db2Script.Error
    e.Ignore = True
    Console.WriteLine(e.Text)
    Console.WriteLine("  Failed.")
  End Sub

End Module

Inheritance Hierarchy

System.Object
   System.MarshalByRefObject
      System.ComponentModel.Component
         Devart.Common.DbScript
            Devart.Data.DB2.DB2Script

Reference

DB2Script Members
Devart.Data.DB2 Namespace
DB2Command Class

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