@Dixon It is never to late to join conversation;) Thanks for your suggestions, I've found some interesting methods in my client's library.

@Doychin: I am using Delphi and FIBPlus. I am not sure if we mean the same thing by "batch script". Some guys at my company prefer to generate a long script file: for example instead of making 10000 inserts one by one they generate a text which consists all inserts. All values for inserts are converted to string so there are no parameters. It might be faster to send one big script to the server instead of 10000 insert commands even if they are prepared. But I am not sure about that, this is something that needs to be checked.

I am always sending a prepared statement:)

Regards,

Martin