>>>>> "Jeff" == Jeff Janes <jeff.ja...@gmail.com> writes:
Jeff> From: https://www.postgresql.org/docs/9.4/static/sql-createtable.html Jeff> "The access method must support amgettuple (see Chapter 55); at Jeff> present this means GIN cannot be used. Although it's allowed, there is Jeff> little point in using B-tree or hash indexes with an exclusion Jeff> constraint, because this does nothing that an ordinary unique Jeff> constraint doesn't do better. So in practice the access method will Jeff> always be GiST or SP-GiST." I also recently found a case where using btree exclusion constraints was useful: a unique index on an expression can't be marked deferrable, but the equivalent exclusion constraint can be. -- Andrew (irc:RhodiumToad) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
