Rudi,
I agree, this does not seem like how it should behave. Probably
something that could be fixed in edismax, not something lower-level
(Lucene)?
Michael
On Fri, Feb 10, 2023 at 9:38 AM Mikhail Khludnev <m...@apache.org> wrote:
>
> Hello, Rudi.
> Well, it doesn't seem perfect. Probably it's can be fixed
> via
> foo bar,zzz,foo,bar
> And in some sort of sense this behavior is reasonable.
> Also you can experiment with sow and pf params (the later param is
> described in dismax page only).
>
> On Thu, Feb 9, 2023 at 8:19 PM Rudi Seitz <r...@rudiseitz.com> wrote:
>
> > Is this known behavior or is it worth a JIRA ticket?
> >
> > Searching against a text_general field in Solr 9.1, if my edismax query is
> > "foo bar" I should be able to get matches for "foo" without "bar" and vice
> > versa. However, if there happens to be a synonym rule applied at query
> > time, like "foo bar,zzz" I can no longer get single-term matches against
> > "foo" or "bar." Both terms are now required, but can occur in either order.
> > If we change the text_general analysis chain to apply synonyms at index
> > time instead of query time, this behavior goes away and single-term matches
> > are again possible.
> >
> > To reproduce, use the _default configset with "foo bar,zzz" added to
> > synonyms.txt. Index these four docs:
> >
> > {"id":"1", "title_txt":"foo"}
> > {"id":"2", "title_txt":"bar"}
> > {"id":"3", "title_txt":"foo bar"}
> > {"id":"4", "title_txt":"bar foo"}
> >
> > Issue a query for "foo bar" (i.e.
> > defType=edismax&q.op=OR&qf=title_txt&q=foo bar)
> > Result: Only docs 3 and 4 come back
> >
> > Issue a query for "bar foo"
> > Result: All four docs come back; the synonym rule is not invoked
> >
> > Looking at the explain output for "foo bar" we see:
> >
> > +((title_txt:zzz (+title_txt:foo +title_txt:bar)))
> >
> >
> > Looking at the explain output for "bar foo" we see:
> >
> > +((title_txt:bar) (title_txt:foo))
> >
> > So, the observed behavior makes sense according to the low-level query
> > structure. But -- is this how it's "supposed" to work?
> >
> > Why not expand the "foo bar" query like this instead?
> >
> > +((title_txt:zzz (title_txt:foo title_txt:bar)))
> >
> > Rudi
> >
>
>
> --
> Sincerely yours
> Mikhail Khludnev
> https://t.me/MUST_SEARCH
> A caveat: Cyrillic!
