Ok, I've studied the documentation. First of all what I needed for most of my fields (StringField, TextField) is the:
MultiFields.getTerms(reader, field.name).size(); which counts the distinct terms for the field. For PointFields the hint was right: PointValues.size() is what i need. For DocValues my question doesn't make sense, since there is no inverted index for those fields. Another edge case is the stored only field. Also for this one I think no count could be provided by lucene. Riccardo 2018-03-01 19:52 GMT+01:00 Riccardo Tasso <riccardo.ta...@gmail.com>: > Thanks, probably for DocValues I can use DocValuesStatsCollector > and DocValuesStats. > > 2018-03-01 2:13 GMT+01:00 Adrien Grand <jpou...@gmail.com>: > >> You probably want to look at PointValues.size(), which gives you the >> number >> of indexed points. Doc values do not support index statistics however. >> >> Le mer. 28 févr. 2018 à 21:47, Riccardo Tasso <riccardo.ta...@gmail.com> >> a >> écrit : >> >> > Hello, >> > I'm porting an application from lucene 4 to lucene 7. >> > >> > I've converted a field from IntField to IntPoint and at query or >> indexing >> > time everything is ok. >> > >> > When I call the method: >> > >> > reader.getSumTotalTermFreq(field); >> > >> > it returns zero for my IntPoint field. I understand that IntPoint is >> stored >> > in specific data structure (the block k-d tree), but how could I obtain >> the >> > same result as in the previous version? >> > >> > Which is the best way to count the "number of terms" also for IntPoint? >> > >> > Can I also find the equivalent of "top terms", i.e. the list of more >> > frequent values for a given field with their count? >> > >> > It would be the same if I will use the NumericDocValuesField? >> > >> > Thanks, >> > Riccardo >> > >> > >
