> On 16 September 2013 at 11:03 Heikki Linnakangas <hlinnakan...@vmware.com> > wrote:
> > Something like this seems completely sensible to me: > > create index i_accounts on accounts using minmax (ts) where valid = true; > > The situation where that would be useful is if 'valid' accounts are > fairly well clustered, but invalid ones are scattered all over the > table. The minimum and maximum stoed in the index would only concern > valid accounts. Here's one that occurs to me: CREATE INDEX i_billing_id_mm ON billing(id) WHERE paid_in_full IS NOT TRUE; Note that this would be a frequently moving target and over years of billing, the subset would be quite small compared to the full system (imagine, say, 50k rows out of 20M). Best Wises, Chris Travers > > - Heikki > > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers Best Wishes, Chris Travers http://www.2ndquadrant.com PostgreSQL Services, Training, and Support
