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!
