On Thu, Jan 14, 2016 at 2:43 PM, Lewin Joy (TMS) <lewin....@toyota.com> wrote:
> Thanks for the reply.
> But, the grouping on multivalued is working for me even with multiple data in
> the multivalued field.
> I also tested this on the tutorial collection from the later solr version
> 5.3.1 , which works as well.
Older versions of Solr would happily populate a FieldCache entry with
a multi-valued field by overwriting old values with new values while
uninverting. Thus the FieldCache entry (used for sorting, faceting,
grouping, function queries, etc) would contain just the last/highest
value for any document.
So that sort-of explains how it was working in the past I think...
probably not how you intended.
If it works sometimes, but not other times, it may be due to details
of the request that cause one code path to be executed vs another, and
you hit a path were the check is done vs not. The check checks the
schema only.
For example, in StrField.java:
@Override
public ValueSource getValueSource(SchemaField field, QParser parser) {
field.checkFieldCacheSource(parser);
return new StrFieldSource(field.getName());
}
There are different implementations of grouping... and only some go
through a ValueSource I believe... and those are the only ones that
would check to see if the field was single valued. The grouping code
started in Solr, but was refactored and moved to Lucene, and I'm no
longer that familiar with it.
-Yonik
