to get the count of multi valued field in solr

问题

In solr i have a multiValued field called animal and it has the values {cat,dog} is it possible to get the number of values inside the multiValued field in solr(in my example 2)?

回答1:

If you want to count the items in a multivalued field use CountFieldValuesUpdateProcessorFactory

回答2:

There is no direct way to get the count of items in a multivalued field.
You can always maintain the field count during indexing and use it.

If not using during query time, you can always count the list size.

来源：https://stackoverflow.com/questions/13838235/to-get-the-count-of-multi-valued-field-in-solr