Niklas,
On Wed, Oct 10, 2012 at 9:44 AM, Niklas Saers <[email protected]> wrote:
>
>
> When I do a search, I receive a responseHeader that has a maxScore. That's
> great, but the score for the individual documents doesn't show. How do I
> get the score for the individual documents listed in my search? I want to
> use this to display to my users 1-5 stars of how well they matched.
>
This is a bug in the Solr-like interface to Riak Search. It discards the
score when building the response.
>
> Secondly, if I add a postfix * to any of my search terms, it searches
> fine, but maxScore says 0.00000e+0. Why is this?
>
This is because a single prefix query, e.g. motor*, will use a range op. A
range op doesn't affect scoring [1]. Since no non-suffix query was given
along with it there is no scoring information and it defaults to 0.
>
> And finally, if I add a weight after my postfix *, i.e. ^5, I get "Unable
> to parse request: {badmatch, {error, { lucene_parse, "syntax error before:
> 5.0" } } } Why is this? As far as I can understand from the docs, a query
> such as "title:listening*^5" should be fine?
>
The parser doesn't understand this query. Even if it did it wouldn't
matter because the range op doesn't respect boosting.
For the last few months I've been working on a new search solution for Riak
that uses Solr directly [2]. That is, unlike Riak Search which pretends to
look like Solr it actually is Solr underneath. Queries like the above,
plus many more, are supported. I know that doesn't help your current
situation but if you want to learn more feel free to contact me on a
backchannel.
-Z
[1]:
https://github.com/basho/riak_search/blob/1.2.1/src/riak_search_op_range_sized.erl#L20
[2]: https://github.com/rzezeski/yokozuna
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