On Sep 25, 2011, at 9:19, pasman pasmański <pasman.p@xxxxxxxxx> wrote: > Hi. > > I propose to add "accumulative" flag to a function definition. This > flag would be set for function f(x) which is accumulative and > immutable. > > This flag allows to use an index on x for clauses containing f(x): > > where f(x) = const > where f(x) > const > > and so on. > > We can term it a Schrodinger function :) I don't understand how it can have mutable state (accumulator) and still be called immutable. Can explain further and give an example (or better yet, real life) use-case? David J. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
