es聚合后求count的总和

使用sum_bucket聚合

{
	"size": 0,
	"query": {
		"match_all": {}
	},
	"aggregations": {
		"questionRecommendAgg": {
			"nested": {
				"path": "messages"
			},
			"aggregations": {
				"messagesAgg": {
					"terms": {
						"field": "messages.cards",
						"size": 100
					}
				},
				"sumMessagesAgg": {
					"sum_bucket": {
						"buckets_path": ["messagesAgg._count"]
					}
				}
			}
		}
	}
}

标签：count,messagesAgg,后求,bucket,aggregations,path,sum,es,size
来源： https://blog.csdn.net/qq_35249342/article/details/119325081