On Jun 20, 2005, at 4:16 PM, David Pradier wrote:
This is maybe a newbie question, but what is the difference with a materialized view ?
As I understand it (and that understanding may be wrong) a materialized view is a table that holds the values of a view from some point in time. A view is a "saved" subselect. Everything you call a view, the PostgreSQL backend re-evaluates the definition of the view. A materialized view is only as accurate as the last time it was updated. Things such as triggers can be used to keep the materialized view updated. The key issue with materialized views is to make sure it's always up-to-date with the evaluation of the view.
Michael Glaesemann grzm myrealbox com ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
