to_tsvector() chopping off trailing 's' characters

Wells Oliver <[email protected]> Fri, 1 Nov 2019 11:28:17 -0700
Newsgroups gmane.comp.db.postgresql.admin
Message-ID <CAOC+FBWAsQy7Gb57xqx8NVo3A5xq_zdrF6FuXXZ_AgmiSfMBeQ@mail.gmail.com>
I don't understand this behavior in 12 (worked in 9.6), but:

select 'Thames', to_tsvector('John Thames');

Gives you a vector of: 'john':1 'thame':2

And searching for the full 'Thames' returns no results.

What's happening here?

-- 
Wells Oliver
[email protected] <[email protected]>