Question about PostgreSQL from Delphi newsgroups

Hi,
Someone asked me a question about PostgreSQL on the Delphi newsgroups
and I was not sure how to answer them:

"Do you know if using PostgreSQL a query or connection can have a
priority set, so it can run quicker than other queries?
For example, in a POS system the reporting queries should have lower
priority than the generated invoices insert queries. "

Thanks,

Tony