On Thu, Oct 9, 2014 at 12:14 PM, Heikki Linnakangas <hlinnakan...@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 -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
