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From Adrien Grand <jpou...@gmail.com>
Subject Re: access to joined documents
Date Wed, 14 Nov 2018 14:10:10 GMT
Hi Mike,

The best approach would be to run the query again indeed since the
join is performed in a lossy way: we record score contributions but
not which documents contributed to the score. For instance this is
what the inner_hits feature of Elasticsearch does when used with
query-time joins.
On Fri, Nov 2, 2018 at 6:17 PM Michael Sokolov <msokolov@gmail.com> wrote:
>
> Hi List, I have a question about query-time joins as provided by
> JoinUtil in the join package. As I understand it, the main documents
> returned by the query will be those having a value in the to-field
> that matches the value in the from-field of some documents returned by
> the fromQuery.
>
> My question is whether it is possible to retrieve the docids of the
> from-document(s) that contributed to the match of a given result
> (to-document). The only way I can see how to do it is effectively to
> re-run the fromQuery with the added constraint that the fromField
> matches the values pulled from the result document's toField. But this
> seems messy given that the work was already done in some sense while
> executing the original query. I looked around but didn't see anything
> that would be keeping track of these matches - did I miss it? Is there
> a better approach than what I described?
>
> -Mike
>
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-- 
Adrien

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