Hi Shalin,
Thanks for your answer. Forgot to mention that we are using 4.10 solr.
Also, I tried using docValues and the performance was worse than getting it
from stored values. Time taken to retrieve data for 2000 docs for 2 fields
was 120 ms vs 230 ms previously and for docValues respectively.
May be there is something wrong in my code.
The code used for retrieving docValues is:
*public* *static* *long* getSingleLong(*SolrIndexSearcher* searcher, *int*
docId,
*String* field) *throws* IOException {
*NumericDocValues* sdv = *DocValues*.*getNumeric*
(searcher.getAtomicReader(),
field);
*return* sdv.get(docId);
}
and
*public* *static* *List<Long>* getMultiLong(*SolrIndexSearcher* searcher,
*int* docId, *String* field) *throws* IOException {
*SortedSetDocValues* ssdv = *DocValues*.*getSortedSet*(
searcher.getAtomicReader(), field);
ssdv.setDocument(docId);
*long* l;
*List<Long>* retval = *new* *ArrayList<Long>*(40);
*while* ((l = ssdv.nextOrd()) != *SortedSetDocValues*.*NO_MORE_ORDS*) {
*BytesRef* bytes = ssdv.lookupOrd(l);
retval.add(*NumericUtils*.*prefixCodedToLong*(bytes));
}
*return* retval;
}
Parvesh Garg
On Wed, May 13, 2015 at 11:36 AM, Shalin Shekhar Mangar <
shalinman...@gmail.com> wrote:
> In Solr 5.0+ you can use Lucene's DocValues API to read the indexed
> information. This is a unifying API over field cache and doc values so it
> can be used on all indexed fields.
>
> e.g. for single-valued field use
> searcher.getLeafReader().getSortedDocValues(fieldName);
> and for multi-valued fields
> use searcher.getLeafReader().getSortedSetDocValues(fieldName);
>
> On Wed, May 13, 2015 at 11:11 AM, Parvesh Garg <parv...@zettata.com>
> wrote:
>
> > Hi All,
> >
> > Was wondering if there is any class in Solr that provides utility methods
> > to fetch indexed field values for documents using docId. Something simple
> > like
> >
> > getMultiLong(String field, int docId)
> >
> > getLong(String field, int docId)
> >
> > We have written a solr component to return group level stats like avg
> > score, max score etc over a large number of documents (say 5000+)
> against a
> > query executed using edismax. Need to get the group id fields value to do
> > that, this is a single valued long field.
> >
> > This component also looks at one more field that is a multivalued long
> > field for each document and compute a score based on frequency + document
> > score for each value.
> >
> > Currently we are using stored fields and was wondering if this approach
> > would be faster.
> >
> > Apologies if this is too much to ask for.
> >
> > Parvesh Garg,
> >
>
>
>
> --
> Regards,
> Shalin Shekhar Mangar.
>
