6.6 Elasticsearch-聚合流水线:AggregationBuilder → Aggregator → LeafBucketCollector
6.6 Elasticsearch-聚合流水线:AggregationBuilder → Aggregator → LeafBucketCollector
1. 引言聚合(Aggregation)是 Elasticsearch 除搜索之外的第二引擎。一条 GET /sales/_search 请求在 "aggs" 节点里写下的 JSON&

