Hi Darius,
This seems to me like misuse/misunderstanding of Solr. As you probably noticed,
Solr score is not normalised - you cannot compare scores of two queries and
tell if one result match better query than the other. There are some techniques
to achieve something close, but that is not that straight forward and might
depend on your case.
In your case, you are trying to use function to query score, and depending on
your index size, it might not perform well. You should probably be better with
custom scorer.
Back to your question: What do you try to achieve? When do you consider two
names to match? Or you expect to calculate score for each document in the index
and return top scored ones? Such solution will not scale.
IMO, it would be the best if you rethink your requirement about score (or use
reranking query parser
https://cwiki.apache.org/confluence/display/solr/Query+Re-Ranking
<https://cwiki.apache.org/confluence/display/solr/Query+Re-Ranking>) and set
proper field analysis and edismax query parser.
Otherwise good luck if you have a large index.
Regards,
Emir
> On 19 Sep 2017, at 00:01, Dariusz Wojtas <dwoj...@gmail.com> wrote:
>
> Hi,
> I am working on an application that searches for entries that may be
> queried by multiple parameters.
> These parameters may be sent to SOLR in different sets, each parameter with
> it's own weight.
>
> Values for the example below might be as follows:
> firstName=John&
> firstName.weight=0.2&
> id=Aw34563456WWA&
> id.weight=0.5&
> fullName=John Adreew Jr. Doe and Partners&
> fullName.weight=0.3
>
>
> There is one very important requirement.
> No marther how many parameters are out there, the total result score cannot
> exceed 1 (100%).
> In every case I multiply param weight and result of string comparison.
> A field may be used in comparison if it's weight is greater than 0 (in fact
> greater than 0.0001).
>
> <str name="q">{!func v=$global_search_function}</str>
> <str name="global_search_function">sum(
> product($firstName.weight, strdist(literal($firstName),
> firstName, edit)),
> map($id.weight, 0.0001, 1000, product($id.weight,
> strdist(literal($id), id, edit)), 0),
> map($fullName.weight, 0.0001, 1000,
> product($fullName.weight, strdist(literal($fullName), fullName, ngram,10)),
> 0),
> )</str>
>
> The question is about comparing fullName above.
> What function should I use for comparison working on the fullName field the
> same way as:
> "John Adreew Jr. Doe and Partners"~10^0.3
> ?
>
> What are the functions that compare strings, other than strdist?
> How do I create function similar to the "John Andrew ..." example above?
>
>
> Best regards,
> Dariusz Wojtas
