> Then tell me please, what is the callstack ?

The callstack is what you get when debugging in Delphi so that you know what
all functions and methods have been called to get you to where you are in
execution. Tracing this tells me what was called and why it is fetching
records.

Look at it from the Debugging menu of Delphi. Consult the help files to know
more details.

NOTE: This is an essential thing to know if you are a Delphi programmer.
Time spent learning to use the full array of debugging resources is very
well spent.

Regards,
Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com