Hi, we are using some of the latest features of lucene for sorting which are very cool but we are facing some issues with the numerical sort:
We need two kinds of sort: numerical and lexical. For the lexical we are using SortedDocValuesField and for the numerical we use NumericDocValuesField. The codec is set to use the DiskDocValuesFormat for all our DV. Since we can return some very large result set, we use the searchAfter method for efficient 'deep-paging', like mentioned in the documentation. When sorting numerically, the search seems to take a bit of a while compared to the lexically sorted search. Also when sorting numerically the result is sorted within each page but no globally as opposed to the lexical sorted search. >From my understanding, a SortedDocValuesField is sorted while indexing but not the NumericDocValuesField which is why we are facing those issues in our implementation. Is that correct ? What would be the best approach in our case for the numerical sorting and is there anything we are missing? Thanks, Nicolas
