On Wed, Jun 13, 2012 at 03:21:17PM -0500, Merlin Moncure wrote: > On Wed, Jun 13, 2012 at 3:18 PM, Bruce Momjian <br...@momjian.us> wrote: > > On Wed, Jun 13, 2012 at 03:15:14PM -0500, Merlin Moncure wrote: > >> yeah -- and I think it's a great thing to want to be able to do. it > >> could be used in parallelizing tricks for example: divide up a table > >> into N approximately equal parts and hand each one off to a work > >> thread. > > > > Can we add this as a TODO? It would basically be adding > > less/greater-than comparisons for the 'tid' data type. > > IMNSHO, it's a no-brainer for the todo (but I think it's more > complicated than adding some comparisons -- which are working now): > > postgres=# explain select ctid from foo where ctid >= '(3786,67)'::tid limit > 1; > QUERY PLAN > ------------------------------------------------------------------ > Limit (cost=0.00..0.05 rows=1 width=6) > -> Seq Scan on foo (cost=0.00..16422.00 rows=333333 width=6) > Filter: (ctid >= '(3786,67)'::tid) > (3 rows)
I see. Seems we have to add index smarts to those comparisons. That might be complicated. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
