Re: pg_class -> reltuples?

On Thu, 2002-03-07 at 17:51, Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Neil Conway wrote:
> >> Is there a reason why the reltuples column of pg_class is stored as a
> >> "real", rather than one of the integer data types?
> 
> > That is an excellent question.  I assume it is related to having > 4
> > billion rows, but we have int8 for that.
> 
> 1. We support tables > 4G rows.

I agree we should try to support very large tables -- so why waste space
on storing floating point? And am I missing something, or is a "real"
only 4 bytes?

> 2. int8 is not available on all platforms.

I have no problem making restrictions on data types for portability, but
at least we should be consistent:

% grep -rI 'long long' * | wc -l    37
% grep -rI 'int64' * | wc -l   191

On all the platforms I tested (x86, SPARC, PPC, PA-RISC, Alpha), a 'long
long' is supported, and is 8 bytes. Which platforms don't have this, and
are we actively supporting them?

Cheers,

Neil

-- 
Neil Conway <neilconway@rogers.com>
PGP Key ID: DB3C29FC