On Fri, Nov 15, 2019 at 1:31 AM Javier Ayres <jay...@sophilabs.com> wrote:
> Hi everybody.
>
> I'm implementing a solution that uses PostgreSQL's full text search
> capabilities and I have come across a particular set of results for ts_rank
> that don't seem to make sense according to the documentation.
>
While the documentation doesn't come out and say, my interpretation is that
ts_rank assumes there is a match in the first place, and by implication is
undefined/unspecified if there is no match.
select to_tsvector('search for a text box') @@ to_tsquery('circle | lot <->
box');
?column?
----------
f
(1 row)
Cheers,
Jeff
