Re: How to switch off Snowball stemmer for tsearch2?

>
> write your own dictionary, which implements any logic you need. In your
> case it's just a wrapper around ispell, which will returns original string
> not stem. See example
> http://www.sai.msu.su/~megera/postgres/fts/doc/fts-intdict-xmp.html
> and russian article
> http://www.sai.msu.su/~megera/postgres/talks/fts_pgsql_intro.html#ftsdict

Ah, I understand you!
You offer to write a small Postgres contrib module (new dictionary) in C and
implement all logic in it.
Seems it's a bit complex solution for such a simple task (exclude surnames
for lexization), but - it could be implemented, of course.

> > Of course I can create all word-forms of all Russian names using ispell
> and
> > then - subtract this full list from Ispell dictionary (so I will remove
> > "Ivan", "Ivanami" etc. from it). But possily tsearch2 has this
> subtraction
> > algorythm already.
> >
>
> don't do that ! Just go plain way.
>

Another method is to generate a singular ** synonym dictionary based on all
Russian names word-forms using ispell (we will get all suspicous surnames in
this set) and add it before ispell. This solution does not need to write
anything in C.