"Edwin Grubbs" <edwin.grubbs@gmail.com> writes:
> Under postgres 8.1, the "<<=" comparison yields very slow queries with large
> tables.
<<= isn't optimizable within joins, and really isn't very suited to
btree indexes at all. Sometime somebody should try to build a GiST
opclass that supports network sub/sup comparisons ... seems like it
should be pretty easy ...
regards, tom lane