> Peter Eisentraut <peter_e@gmx.net> writes:
> > I would like to re-table my proposal from many moons ago to allow
> > pattern-matching operations to use indexes under any locale.
Wouldn't existing b-trees be sufficient, if they could be 'scanned' starting
with the operator >= ? Thus a LIKE 'ABC%' could be done by stepping an (ascending)
index fom x >= 'ABC' up to the first key that does not have 'ABC' as first
characters ?
Seems this would be of more general use, than an extra index for LIKE, no ?
Some upper bound would still be needed for a selectivity estimate, but for
estimation purposes it would not really need to be watertight.
Andreas
