I know that I can use the SignatureUpdateProcessorFactory to remove
duplicates but I would like the duplicates in the index but remove them
conditionally at query time.

Is there any easy way I could accomplish this?

> I know that I can use the
> SignatureUpdateProcessorFactory to remove duplicates but I
> would like the duplicates in the index but remove them
> conditionally at query time.
>
> Is there any easy way I could accomplish this?
Closest thing can be group documents by signature field.
http://wiki.apache.org/solr/FieldCollapsing