Rollback;
The Rollback method cancels the changes made within this transaction.
Add links to the Dal system assembly.
Sub UserProc;
Var
Driver: IDalDriver;
Connect: IDalConnection;
Command: IDalCommand;
ConnectDesc: IDalConnectionDescriptor;
ConnectDescParams: IDalConnectionDescriptorParams;
Begin
Driver := New DalOrcl8Driver.Create;
ConnectDesc := Driver.CreateDescriptor;
//Connection parameters
ConnectDescParams := ConnectDesc.Params;
ConnectDescParams.Find("User Name").Value := "User";
ConnectDescParams.Find("Password").Value := "Password";
ConnectDescParams.Find("Host BSTR").Value := "OrclServer";
ConnectDescParams.Find("Schema").Value := "Repository";
//Create a connection
Connect := ConnectDesc.CreateConnection;
Command := Connect.CreateCommand;
//Command
Command.SQL := "Insert Into DataTable Values ('AA','BB',11,22,'12.12.2008')";
Connect.StartTransaction;
//Execute command
Command.Execute;
//Finish transaction with rollback of changes
Connect.Rollback;
Command.Close;
Connect.Close;
End Sub UserProc;
On executing the example the repository connection is established with specified location parameters. After that the transaction is initialized, and the SQL query is executed, a new record is added to the DataTable table. Then made changes are canceled.
See also: