Hi, in Elasticsearch 2.x, the filter argument was added to the bool query. I've noticed that should does not enforce the "1 or more" match if filter is also included as an option. The documentation (https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-query.html) states that should only matches 1 or more if no must is present. So essentially, the question is whether filter is also considered to be the same as must (except it does not contribute to the score)? If so, perhaps we should clarify this in the reference guide?
Thanks.