On Wed, Feb 12, 2014 at 2:58 AM, Bruce Momjian <bruce@momjian.us> wrote:
On Sun, Feb 9, 2014 at 02:17:12PM +0400, Alexander Korotkov wrote: > On Thu, Feb 6, 2014 at 8:31 PM, PostgreSQL - Hans-J rgen Sch nig <
> postgres@cybertec.at> wrote: > > i think there is one more thing which would be really good in GIN and which > would solve a ton of issues. > atm GIN entries are sorted by item pointer. > if we could sort them by a "column" it would fix a couple of real work > issues such as ... > > SELECT ... FROM foo WHERE "tsearch_query" ORDER BY price DESC LIMIT > 10 > > ... or so. > it many cases you want to search for a, say, product and find the cheapest > / most expensive one. > if the tsearch_query yields a high number of rows (which it often does) the > subsequent sort will kill you. > > > This is not intended to be a small change. However, some solution might be > possible in post 9.4 gin improvements or in new secret indexing project which > will be presented at PGCon :-)
Would any of the listed changes cause backward-incompatible changes to the on-disk format, causing problems for pg_upgrade?
