In a previous discussion thread, Oleg suggested that ts_rank is unable to use GIN indices: http://archives.postgresql.org/pgsql-general/2011-07/msg00351.php
This is the only information I have about this. On Wed, Mar 7, 2012 at 18:59, Andrey Chursin <an...@danasoft.ws> wrote: > Is there any way to sort by ranking, avoiding seq scan? > The only way i see now is to use pg_trgm instead of ts_rank, but we > did not check yet how applicable is it for our purposes. >
