Bruce Momjian <pgman@candle.pha.pa.us> writes:
> So, my understanding is that you would create something such as:
> CREATE INDEX iix ON tab (LIKE col)
> and that does LIKE lookups and knows how to do col LIKE 'abc%', but it
> can't be used for >= or ORDER BY, but it can be used for equality tests?
Hm. Right at the moment, it wouldn't be used for equality tests unless
you spelled equality as "a ~=~ b". I wonder whether that's necessary
though; couldn't we dispense with that operator and use ordinary
equality as the BTEqual member of these opclasses? Are there any
locales that claim that not-physically-identical strings are equal?
regards, tom lane
