"Edwin Grubbs" <[EMAIL PROTECTED]> 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

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