Hi Stephen,

On Wed, Oct 23, 2013 at 9:29 AM, Stephen GRAY <stephen.g...@immi.gov.au> wrote:
> UNOFFICIAL
> Hi everyone,
>
> I have a question about how to retrieve the values in a 
> NumericDocValuesField. I understand how to do this in situations where you 
> have an AtomicReaderContext available 
> (context.reader().getNumericDocValues(field)). However in a situation where I 
> have just done a search and only have a searcher available, and I want to get 
> the NumericDocValue in each document returned by the search, is there a way 
> to do this?

The purpose of doc values is usually scoring, sorting or faceting but
here you are willing to actually use them as stored fields. I would
recommend storing this numeric field value twice, once as a
NumericDocValuesField and once as a StoredField.

Otherwise, what you want to do is still possible (but a bad
trade-off), for every document, you can find its AtomicReader by
calling ReaderUtil.subIndex on the IndexReader.leaves() of your index
reader (that you can get from the IndexSearcher by calling
IndexSearcher.getIndexReader).

-- 
Adrien

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