Begins a new user transaction against the database server.
procedure StartTransaction(IsolationLevel: TOraIsolationLevel; const RollbackSegment: string = ''; const Name: string = ''); reintroduce; overload;
Specify the RollbackSegment parameter to assign the current transaction to the specified rollback segment. This clause also implicitly establishes the transaction as a read/write transaction.
The Name parameter is useful in distributed database environments when you must identify and resolve in-doubt transactions. The text string is limited to 255 bytes.