On Mon, May 11, 2020 at 6:23 PM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> OK, I was able to add some of it cleanly:
>
> This allows efficient btree indexing of low cardinality columns by
> storing duplicate keys only once. Users upgrading with pg_upgrade
> will need to use REINDEX to make use of this feature.
That seems like a reasonable compromise. Thanks!
--
Peter Geoghegan