On Thu, Oct 9, 2014 at 12:14 PM, Heikki Linnakangas
<hlinnakangas@vmware.com> wrote:
> B-tree index build uses tuplesort.c. What's missing?
I don't think that all that much is missing. Tuplesort expects to work
with an index scankey when sorting B-Tree tuples. There needs to be
something like a reverse lookup of the sortsupport function. It looks
like a historical oversight, that would take time to fix, but wouldn't
be particularly challenging. You'd need to pick out the operators from
the scankey, so you'd have something like what tuplesort_begin_heap()
starts off with with tuplesort_begin_index_btree().
copytup_index() would then later need to be modifed to make
abbreviation occur there too, but that's no big deal.
--
Peter Geoghegan