Hi, I see there are few ways in Solr which can "almost" be used for my use case, but all of them appear to fall short eventually.
Here is what I am trying to do: consider the following document structure (there are many more fields in play, but this is enough for example): Manufacturer ProductType Color Size Price CountAvailableItems Based on user parameters (search string, some filters), I would fetch a set of documents. What I need is to group resulting documents by different attribute combinations (say "Manufacturer + Color" or "ProductType + Color + Size" or ...) and get stats (Max Price, Avg Price, Num of available items) for those groups. Possible solutions in Solr: 1) StatsComponent - provides all stats I would need, but its grouping functionality is basic - it can group on a single field (stats.field + stats.facet) while I need field combinations. There is an issue https://issues.apache.org/jira/browse/SOLR-2472 which tried to deal with that, but it looks like it got stuck in the past. 2) Pivot Faceting - seems like it would provide all the grouping logic I need and in combination with https://issues.apache.org/jira/browse/SOLR-3583"Percentiles for facets, pivot facets, and distributed pivot facets" would bring percentiles and averages. However, I would still miss things like Max/Min/Sum and the issue is not committed yet anyway. I would also depend on another yet to be committed issue https://issues.apache.org/jira/browse/SOLR-2894 for distributed support. 3) Configurable Collectors - https://issues.apache.org/jira/browse/SOLR-4465- seems promissing, but it allows grouping by just one field and, probably a bigger problem, seem it was just a POC and will need overhauling before it is anywhere near being ready for commit Are there any other options I missed? Thanks, Bojan
