Re: Indexing null dates

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > +    <literal>NULL</> values are not indexed by default.
>
> This is quite incorrect.  The nulls *are* indexed (at least in btree
> indexes); the issue is whether there is any way to use the index to
> search for them.  I do not think it helps anyone for the documentation
> to get this basic point wrong, even if the distinction is subtle.

OK, docs updated with:

   Indexes can not be used with <literal>IS NULL</> clauses by default.
   The best way to use indexes in such cases is to create a partial index
   using an <literal>IS NULL</> comparison.

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