Hi Tri,
Thank you so much for your message!
Yes, it looks like the negation terms have indeed been filtered out;
when I query on "no" or "not", I get no results. I am just using
StandardAnalyzer and the classic QueryParser:
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_47);
QueryParser parser = new QueryParser(Version.LUCENE_47, field, analyzer);
Which analyzer/parser would you recommend?
Thank you again,
Natalia
On Mon, Mar 17, 2014 at 3:35 PM, Tri Cao <tm...@me.com> wrote:
> Natalia,
>
> First make sure that your analyzers (both index and query analyzers) do
> not filter out these as stop words. I think the standard StopFilter list
> has "no" and "not". You can try to see if you index have these terms by
> querying for "no" as a TermQuery. If there is not match for that query,
> then you know for sure they have been filtered out.
>
> The next thing is to check is your query parser. What query parser are you
> using? Some parser actually understands the "not" term and rewrite to a
> negation query.
>
> Hope this helps,
> Tri
>
>
> On Mar 17, 2014, at 12:02 PM, Natalia Connolly <
> natalia.v.conno...@gmail.com> wrote:
>
> Hi All,
>
> Is there any way I could construct a query that would not automatically
> exclude negation terms (such as "no", "not", etc)? For example, I need to
> find strings like "not happy", "no idea", "never available". I tried
> using a simple analyzer with combinations such as "not AND happy", and
> similar patterns, but it does not work.
>
> Any help would be appreciated!
>
> Natalia
>
>
