Asynch queries and cancel

[coppola]

Hi folks,

I need to know if there is any way to execute a SELECT asynchronously
and if a long time consuming query can be canceled. I have an application
that stores Dlls in a PostgresSQL 8.1 database and have to download
then when necessary to the user's machine. This operation can take
a long time to complete and sometimes the users complain about not been
able to cancel it. I'm using ZEOS 6.5.1 alpha CVS as of 13/10/2005.

TIA,

Coppola.