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Devart.Data.MySql Namespace / MySqlLoader Class / Delayed Property
Example

Delayed Property
Determines whether to use INSERT DELAYED statement syntax.
Syntax
'Declaration
 
Public Property Delayed As Boolean
 

Property Value

true, if INSERT DELAYED statement syntax is used; otherwise, false. The default value is true.
Remarks

Using this option may result in performance increased. However, in this mode the data may be inaccessible right after the Close method invocation. MySQL does not allow to use both Delayed and Lock options at the same time.

MySQL supports DELAYED keyword only for MyISAM and ISAM storage engines.

Example
The following example creates a MySqlLoader, then populates Columns collection from table description, loads data, flushes the buffer and dispose internal MySqlLoader structures. Performance of the script is improved by using delayed insertion.
public void LoadData(MySqlConnection myConnection)
{
  myConnection.Open();
  myConnection.Database = "Test";
  MySqlLoader loader = new MySqlLoader();
  loader.Connection = myConnection;
  loader.TableName = "load_table";
  loader.Delayed = true;
  try
  {
    loader.CreateColumns();
    loader.Open();
    for (int i = 1; i <= 10000; i++)
    {
      loader.SetValue("id", i);
      loader.SetValue("char_field", "test string");
      loader.SetValue("date_field", DateTime.Now);
      loader.NextRow();
    }
    loader.Close();
  }
  finally
  {
    myConnection.Close();
  }
}
Public Sub LoadData(ByVal myConnection As MySqlConnection)
  myConnection.Open()
  myConnection.Database = "Test"
  Dim loader As MySqlLoader
  loader = New MySqlLoader
  loader.Connection = myConnection
  loader.TableName = "load_table"
  loader.Delayed = True
  Try
    loader.CreateColumns()
    loader.Open()
    Dim i As Integer
    For i = 1 To 10000
      loader.SetValue("id", i)
      loader.SetValue("char_field", "test string")
      loader.SetValue("date_field", DateTime.Now)
      loader.NextRow()
    Next i
    loader.Close()
  Finally
    myConnection.Close()
  End Try
End Sub
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