Hans-Juergen Schoenig wrote:
> this kind of indexing makes sense if you visit the same data over and
> over again. WITH-queries would be an example for that and self joins
> could benefit from the this feature too.
Yes, for joins it is useful. We have hash joins, which are kind of ad hoc
hash indexes. If anyone wants to implement a btree join, that might work. :)
But I think we essentially support what the OP is asking for, it is just
under different labels.
--
Peter Eisentraut
http://developer.postgresql.org/~petere/
