Grzegorz Jaskiewicz <gj@pointblue.com.pl> writes:
> I have all operators required for b-tree, gist up here, and gist
> index defined. But still "order by custom_type" won't work.
Define "won't work" ... what happens?
> I have kind of wild card masks in my type definition, so b-tree won't
> work. But still, do I need to define b-tree index as such for "order
> by" to work ?
You don't need an index, but a b-tree operator class is a good idea.
Still, it should be possible to sort with only a "<" operator --- at
the moment anyway. (I've been thinking about some ideas that would
effectively require a b-tree opclass to do sorting, so this might not
still be true in 8.2 ...)
regards, tom lane
