Solr 构面和过滤器查询之间的计数不匹配

Question

I am running solr 7.7.2 and I am trying to apply facet on a particular field "display-classification_en_string_mv" (type="string" indexed="true" stored="false" multiValued="true"). The problem is when i try to apply facets on this field, with acet=true&facet.field={.ex%3Dfkdisplay-classification}display-classification_en_string_mv&facet.mincount=1&facet.limit=10&facet,sort=count,

The actual facet count i get for a variant of this field "maxi dress" is 100 as shown below.

facet count for value "maxi dress" under field is 100

Now when i try to add a filterquery (fq) like this fq={:tag%3Dfkdisplay-classification}+display-classification_en_string_mv,"Maxi+Dress". the actual count increases to 101.

after filter query count increases to 101

One thing to note is i am using a collapse query to group documents having same value in a field of type="string" indexed="true" stored="true".

This count mismatch happens only when the collapse query is applied, and without the collapsing in place, the count remains same in both cases.

Please let me know if i am missing something or any error in implementation which might lead to this.

Thanks in advance

Answer 1

Apparently, the collapse query selects one of the documents in the group as a leader and selects it for counting facets, and in one of the group, the leader which was getting selected didn't have the field considered for facets.