ES禁用_source不会影响聚合
From Elasticsearch's website: The _source field contains the original JSON document body that was passed at index time. The _source field itself is not indexed (and thus is not searchable), but it is stored so that it can be returned when executing fetch requests, like get or search Disabling the source will prevent Elasticsearch from displaying it in the resultset. However, filtering, querying and aggregations will not be affected. So these two queries will not generate any results in terms of ...
