Обсуждение: TSearch: Need debug help
SELECT ts_debug('durst');
(default_german,lword,"Latin word",durst,"{de_ispell,de}","'dur' 'sen'")
SELECT ts_debug('höchsten');
(default_german,word,Word,höchsten,"{de_ispell,de}","'sen' 'höch'
'höchst' 'höchsten'")
For some reason both produce the lexem 'sen'. That leads to strange
results. Search for `durst' will highlight `höchsten' with headline().
Server is PG 8.0.4,
german snowball stemmer,
dictionary used is http://hannes.imos.net/german_iso.med
(From OpenOffice)
What causes some words to result in `sen', though they don't contain
that lexem?
Thanks!
--
Regards,
Hannes Dorbath
Hannes,
I don't know german, sorry, but does 'dursten' is a some form of 'durst' ?
Probably, here we have false hit from compound word support. I'd suggest
to use exclusion dictionary (on the base of synonym dictionary)
before ispell. It could be very simple:
durst : durst
Oleg
On Thu, 3 Aug 2006, Hannes Dorbath wrote:
> SELECT ts_debug('durst');
> (default_german,lword,"Latin word",durst,"{de_ispell,de}","'dur' 'sen'")
>
> SELECT ts_debug('h?chsten');
> (default_german,word,Word,h?chsten,"{de_ispell,de}","'sen' 'h?ch' 'h?chst'
> 'h?chsten'")
>
> For some reason both produce the lexem 'sen'. That leads to strange results.
> Search for `durst' will highlight `h?chsten' with headline().
>
> Server is PG 8.0.4,
> german snowball stemmer,
> dictionary used is http://hannes.imos.net/german_iso.med
> (From OpenOffice)
>
> What causes some words to result in `sen', though they don't contain that
> lexem?
>
> Thanks!
>
>
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
> but does 'dursten' is a some form of 'durst' ?
Yes it is.
Hm, even when I remove `dursten' and `durst' all together from the dict
I still get `sen'.
How can I update a tsvector column stripping the `sen' lexem?
Thanks!
On 03.08.2006 12:54, Oleg Bartunov wrote:
> Hannes,
>
> I don't know german, sorry, but does 'dursten' is a some form of 'durst' ?
> Probably, here we have false hit from compound word support. I'd suggest
> to use exclusion dictionary (on the base of synonym dictionary) before
> ispell. It could be very simple:
> durst : durst
>
>
> Oleg
>
> On Thu, 3 Aug 2006, Hannes Dorbath wrote:
>
>> SELECT ts_debug('durst');
>> (default_german,lword,"Latin word",durst,"{de_ispell,de}","'dur' 'sen'")
>>
>> SELECT ts_debug('h?chsten');
>> (default_german,word,Word,h?chsten,"{de_ispell,de}","'sen' 'h?ch'
>> 'h?chst' 'h?chsten'")
>>
>> For some reason both produce the lexem 'sen'. That leads to strange
>> results. Search for `durst' will highlight `h?chsten' with headline().
>>
>> Server is PG 8.0.4,
>> german snowball stemmer,
>> dictionary used is http://hannes.imos.net/german_iso.med
>> (From OpenOffice)
>>
>> What causes some words to result in `sen', though they don't contain
>> that lexem?
>>
>> Thanks!
>>
>>
>
> Regards,
> Oleg
> _____________________________________________________________
> Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
> Sternberg Astronomical Institute, Moscow University, Russia
> Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
> phone: +007(495)939-16-83, +007(495)939-23-83
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: Have you checked our extensive FAQ?
>
> http://www.postgresql.org/docs/faq
>
--
Regards,
Hannes Dorbath
> hmm, I don't like this. Why not create synonym dictionary as written on http://www.sai.msu.su/~megera/wiki/Tsearch_V2_Notes Because I found some more words with the same problem, and I have no idea how much there are in total :/ > you need to reindex when you change dictionaries. I just tested with ts_debug() in a new session (dict was reloaded).. On 03.08.2006 13:22, Oleg Bartunov wrote: > On Thu, 3 Aug 2006, Hannes Dorbath wrote: > >>> but does 'dursten' is a some form of 'durst' ? >> >> Yes it is. >> >> Hm, even when I remove `dursten' and `durst' all together from the >> dict I still get `sen'. > > hmm, I don't like this. Why not create synonym dictionary as written on > http://www.sai.msu.su/~megera/wiki/Tsearch_V2_Notes > > >> >> How can I update a tsvector column stripping the `sen' lexem? > > you need to reindex when you change dictionaries. > >> >> Thanks! >> >> On 03.08.2006 12:54, Oleg Bartunov wrote: >>> Hannes, >>> >>> I don't know german, sorry, but does 'dursten' is a some form of >>> 'durst' ? >>> Probably, here we have false hit from compound word support. I'd suggest >>> to use exclusion dictionary (on the base of synonym dictionary) >>> before ispell. It could be very simple: >>> durst : durst >>> >>> >>> Oleg >>> >>> On Thu, 3 Aug 2006, Hannes Dorbath wrote: >>> >>>> SELECT ts_debug('durst'); >>>> (default_german,lword,"Latin word",durst,"{de_ispell,de}","'dur' >>>> 'sen'") >>>> >>>> SELECT ts_debug('h?chsten'); >>>> (default_german,word,Word,h?chsten,"{de_ispell,de}","'sen' 'h?ch' >>>> 'h?chst' 'h?chsten'") >>>> >>>> For some reason both produce the lexem 'sen'. That leads to strange >>>> results. Search for `durst' will highlight `h?chsten' with headline(). >>>> >>>> Server is PG 8.0.4, >>>> german snowball stemmer, >>>> dictionary used is http://hannes.imos.net/german_iso.med >>>> (From OpenOffice) >>>> >>>> What causes some words to result in `sen', though they don't contain >>>> that lexem? >>>> >>>> Thanks! >>>> >>>> >>> >>> Regards, >>> Oleg >>> _____________________________________________________________ >>> Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru), >>> Sternberg Astronomical Institute, Moscow University, Russia >>> Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/ >>> phone: +007(495)939-16-83, +007(495)939-23-83 >>> >>> ---------------------------(end of broadcast)--------------------------- >>> TIP 3: Have you checked our extensive FAQ? >>> >>> http://www.postgresql.org/docs/faq >>> >> >> >> > > Regards, > Oleg > _____________________________________________________________ > Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru), > Sternberg Astronomical Institute, Moscow University, Russia > Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/ > phone: +007(495)939-16-83, +007(495)939-23-83 -- imos Gesellschaft fuer Internet-Marketing und Online-Services mbH Alfons-Feifel-Str. 9 // D-73037 Goeppingen // Stauferpark Ost Tel: 07161 93339-14 // Fax: 07161 93339-99 // Internet: www.imos.net