Inconsistency with stemming/stop words in Tsearch2
| От | Yishai Lerner |
|---|---|
| Тема | Inconsistency with stemming/stop words in Tsearch2 |
| Дата | |
| Msg-id | E18D9633-0692-4D9D-A11D-0C0303FAC508@alum.mit.edu обсуждение исходный текст |
| Ответы |
Re: Inconsistency with stemming/stop words in Tsearch2
|
| Список | pgsql-general |
Hi, having an issue with Tsearch2 and how stop words lexemes are sometimes being utilized and sometimes not. I would expect the behavior for to_tsquery for the three variations of "what", "what's" and "whats" to be consistent (using 'en_stem') and for all variations to be ignored since they all result in a stop word of "what". However, this is not the case as to_tsquery("whats") returns the stop word "what" as a result. Even more confusing is that if one were to look at the lexize results below, they are inconsistent with the to_tsquery results below. This seems like a bug to me.
goodrec_2=# select lexize('en_stem', 'what''s');
lexize
--------
{what}
goodrec_2=# select lexize('en_stem', 'whats');
lexize
--------
{what}
goodrec_2=# select lexize('en_stem', 'what');
lexize
--------
{}
goodrec_2=# select to_tsquery('what''s');
NOTICE: query contains only stopword(s) or doesn't contain lexeme(s), ignored
to_tsquery
goodrec_2=# select to_tsquery('whats');
to_tsquery
------------
'what'
goodrec_2=# select to_tsquery('what');
NOTICE: query contains only stopword(s) or doesn't contain lexeme(s), ignored
В списке pgsql-general по дате отправления: