Flow Field Performance on page

samantha73

Hi All
I normally create flow fields for various calculated fields required for pages and reporting. My understanding is that the flow fields are triggered for only the records displayed on a page rather than the whole table. For example, say we have a flow field on posted sales invoices and the underlying table contains 1000 records. Now when we open the posted sales invoice list page it shows 20 records. Is it right to assume the system only calculates flow fields for the 20 records? A related question/assumption is there is no expressly defined table locking functions so assume it's being taking of when running a p[age or a report. When used to create reports in SQL server with stored procs I'd use NOLOCK to ensure write operations aren't affected (whether that actually happen or not is another question)