Hi,I have a special case of grouping multivalued fields and I wonder if this is possible with SOLR.
I have a field "foo" that is generally multivalued. But for a restricted set of documents this field has one value or is not present. So normally grouping should work.
Sadly SOLR is failing fast and I wonder if there is some way to specify "group by first|any|last|min|max (means all the same here) value of foo".
regards, Thomas
