Claudio Freire wrote: > Unique indexes still need to scan all duplicates to check visibility > and will become O(N^2) there.
That scenario doesn't matter, because on unique indexes there aren't many duplicate values anyway -- only one can be a live tuple. -- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
