Re: HASH index method not correctly handling NULL text - Mailing list pgsql-general

On Sat, 2002-02-02 at 19:58, Tom Lane wrote:
> David Madore <david.madore@ens.fr> writes:
> > table has 345442 rows, of which 344339 have a non NULL value in the
> > column in question.  The index creation proceeded without trouble, but
> > a subsequent "VACUUM VERBOSE ANALYZE" command gave the following
> > warning: "NUMBER OF INDEX' TUPLES (344339) IS NOT THE SAME AS HEAP'
> > (345442)" with the advice to recreate the index.  Essentially, my
> > question is: is the warning incorrect or is the index so?
>
> The warning should be suppressed for hash indexes, since they don't
> include nulls.  I believe this is fixed in 7.2.

Is there a reason why hash indexes don't include NULLs?

Cheers,

Neil

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