"Mark Hollomon" <mhh@nortelnetworks.com> writes:
> Tom Lane wrote:
>> pg_statistic to cope with long
>> min/max/common values (not sure about this).
> I would think pg_statistic would be a 'must'.
Well, it's not a "must" because the code copes fine now (there's a test
in there that simply drops pg_statistic tuples that won't fit).
Question is whether we need good selectivity estimation on columns where
the min/max/common values exceed 8K total (when represented in text form).
Or for that matter whether the estimates we derive from such values are
really useful ...
regards, tom lane