Hi, Craig just mentioned in an internal chat that there's no btree or even hash opclass for the new pg_lsn type. That restricts what you can do with it quite severely. Imo this should be fixed for 9.4 - after all it was possible unto now to index a table with lsns returned by system functions or have queries with grouping on them without casting.
Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, 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