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From "Chris Male (JIRA)" <>
Subject [jira] [Commented] (SOLR-2533) Improve API of ValueSource & FunctionQuery SortField weighting
Date Sun, 22 May 2011 10:27:47 GMT


Chris Male commented on SOLR-2533:

bq. So, this 'weighting' is more like Query.rewrite than Query.weight, right?
bq. Except I wonder if we should rename "weight" to "rewrite"

Yeah I totally agree.  The fact that ValueSources use to weight inner Queries is actually
an implementation detail and even then it does a rewrite too.  I think for consistency with
Query, we should go with rewrite.  I'll regenerate the patch.

> Improve API of ValueSource & FunctionQuery SortField weighting
> --------------------------------------------------------------
>                 Key: SOLR-2533
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: search
>            Reporter: Chris Male
>         Attachments: SOLR-2533.patch
> Started from LUCENE-2883: Support for sorting by ValueSource and FunctionQueries is done
through ValueSource#getSort and the ValueSourceSortField.  In order to support VSs containing
other Queries, its necessary to allow the Querys to be weighted by an IndexSearcher.  Currently
this is handled by having ValueSourceSortField implement SolrSortField.  In Solr's SolrIndexSearcher,
SortFields implementing SolrSortField are then weighted before the Sort is used.
> Sorting by FunctionQuery and ValueSource are invaluable and will become available to
all Lucene users in LUCENE-2883.  But in order to do so, we need to remove the coupling of
this functionality to Solr, and make it more standard.
> Any and all thoughts about how to do this are appreciated.

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