Please try ODAC 5.50 Beta version that is available for download now at http://www.crlab.com/odac/download.html.
New features:
- Support for Delphi 2005 added
- Performance of Net option improved
- Ability to change the current schema of the session with TOraSession.Schema property added
- Ability to connect middle-tier application clients with TOraSession.ProxySession property added
http://www.crlab.com/odac