Sven R. Kunze schrieb am 26.02.2015 um 12:04: > I just thought about btree indexes here mainly because they well-known and well-used in ORM frameworks. If your ORM framework needs to know about the internals of an index definition or even requires a certain index type, then you should ditch that ORM framework. Apart from indexes supporting business constraints (e.g. a unique index) neither the application nor the the ORM framework should care about indexes at all. > does PostgreSQL support the concept of reverse key indexing as described here? The real question is: why do you think you need such an index? Do you have any performance problems with the existing BTree index? If yes, which problem exactly? Thomas -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance