Re: Minimum selectivity estimate for LIKE 'prefix%'

Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> Am Donnerstag, 6. Mrz 2008 schrieb Tom Lane:
>> I attach a proposed patch against HEAD for this. It's a bit long
>> but most of the bulk is refactoring eqsel() to make it easy to use from
>> prefix_selectivity(). The intellectual content is just in the last
>> diff hunk.

> Looking at the patch as committed here
> <http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/selfuncs.c.diff?r1=1.243;r2=1.244>,
> I am confused by one hunk:

Ack, that's a bug --- I was looking at the use of opproc by
ineq_histogram_selectivity and failed to notice make_greater_string
using it too. Will fix.

regards, tom lane