Fetch zero result rows when executing a query?

I'm working on the Npgsql, the .NET driver for PostgreSQL, and am trying to find a way to execute a query but without fetching any rows. The Execute message has a maximum result-row count, but zero is documented to mean "fetch all rows".

The use case would be sending a query which might modify or might not (e.g. UPDATE), but we know that the user is uninterested in any result row.

My current workaround is to specify maxrows=1, was wondering if I missed a better alternative.

Thanks,

Shay