On Thu, Aug 4, 2016 at 01:16:20AM +0100, Simon Riggs wrote: > > Would you only add a LITE index entry when there isn't an > > existing index entry for the same values and heap page? That seems > > quite complicated. > > The insertion algorithm is described. Doesn't seem complicated to me.
Ah, I see it now: As UPDATEs occur we request inserts into the index. If a lossy index pointer already exists that covers the new linepointer then we skip the index insert, optimizing writes to the index. I thought you meant "already exists" just means it matches the existing range. I was unclear that was the entire page. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription + -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers