Re: Calculating selectivity for the query-planner on ts_vector colums.

Jesper Krogh <jesper@krogh.cc> writes:
> It seems to me that the row estimates on a ts_vector search is a bit on
> the low side for terms that is not in th MCV-list in pg_stats:

tsvector has its own selectivity estimator that's not like plain scalar
equality.  Look into src/backend/tsearch/ts_selfuncs.c if you want to
see the rules.

            regards, tom lane