MDAC 2.5 SDK - OLE DB Providers
OLE DB Provider for Microsoft Jet
This section describes Jet-specific information about the IAccessor interface.
Optimization
Microsoft Jet does not have an internal row cache; therefore, it is not capable of optimization as described in the OLE DB Programmer's Reference. All accessors are equally optimized. Do not try to optimize accessors in the OLE DB Provider for Microsoft Jet.