dotConnect for PostgreSQL Documentation
Devart.Data.PostgreSql Namespace / PgSqlScript Class
Members Example

In This Topic
    PgSqlScript Class
    In This Topic
    Serves to execute series of SQL statements separated by special symbols.
    Syntax
    'Declaration
     
    Public Class PgSqlScript 
       Inherits Devart.Common.DbScript
       Implements System.ComponentModel.IComponentSystem.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 PgSqlCommand. Usually it isn't a good solution. With only one PgSqlScript component you can execute several SQL statements as one. This sequence of statements is named script. To separate individual statements use semicolon (;) symbol.

    When PgSqlScript 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.
    [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";
          PgSqlConnection pgConn = new PgSqlConnection(
              "host=server;database=test;user id=postgres;");
          PgSqlScript pgScript = new PgSqlScript(script,pgConn);
          pgScript.Progress += new Devart.Common.ScriptProgressEventHandler(OnProgress);
          pgScript.Error += new Devart.Common.ScriptErrorEventHandler(OnError);
          pgConn.Open();
          pgScript.Execute();
          pgConn.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.");
    }
    Module Module1
    
      Friend WithEvents pgScript As Devart.Data.PostgreSql.PgSqlScript
    
      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 pgConn As PgSqlConnection = New PgSqlConnection( _
            "host=server;database=test;user id=postgres;")
        pgScript = New PgSqlScript(script, pgConn)
        pgConn.Open()
        pgScript.Execute()
        pgConn.Close()
        Console.ReadLine()
      End Sub
    
      Sub OnProgress(ByVal sender As Object, ByVal e As Devart.Common.ScriptProgressEventArgs) Handles pgScript.Progress
        Console.WriteLine(e.Text)
        Console.WriteLine("  Successfully executed.")
      End Sub
    
      Sub OnError(ByVal sender As Object, ByVal e As Devart.Common.ScriptErrorEventArgs) Handles pgScript.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.PostgreSql.PgSqlScript

    Requirements

    Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

    See Also