Elasticsearch 桶统计数据聚合
桶总数聚合（stats bucket aggregation）
桶总数聚合用于计算兄弟聚合中所有桶指定度量值的各类统计数据。被指定的度量必须是数字并且兄弟聚合必须为多桶聚合。
语法
{
"stats_bucket": {
"buckets_path": "the_sum"
}
}
| 参数名称 | 描述 | 必需 | 默认值 |
|---|---|---|---|
| buckets_path | 通向期望计算统计数据的桶的路径 | 必需 | |
| gap_policy | 当数据出现间隙时采用的策略 | 可选 | skip |
| format | 应用于聚合输出值的格式 | 可选 | null |
POST /bank/_search
{
"size": 0,
"aggs": {
"per_state":{
"terms": { "field": "state.keyword"}
},
"per_state_stats": {
"stats_bucket": {
"buckets_path": "per_state>_count"
}
}
}
}
note：buckets_path用于指示桶统计数据聚合计算per_state聚合中terms聚合中的doc_count的统计数据。
{
"took" : 2,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 1000,
"max_score" : 0.0,
"hits" : [ ]
},
"aggregations" : {
"per_state" : {
"doc_count_error_upper_bound" : 20,
"sum_other_doc_count" : 770,
"buckets" : [
{
"key" : "ID",
"doc_count" : 27
},
{
"key" : "TX",
"doc_count" : 27
},
{
"key" : "AL",
"doc_count" : 25
},
{
"key" : "MD",
"doc_count" : 25
},
{
"key" : "TN",
"doc_count" : 23
},
{
"key" : "MA",
"doc_count" : 21
},
{
"key" : "NC",
"doc_count" : 21
},
{
"key" : "ND",
"doc_count" : 21
},
{
"key" : "ME",
"doc_count" : 20
},
{
"key" : "MO",
"doc_count" : 20
}
]
},
"per_state_stats" : {
"count" : 10,
"min" : 20.0,
"max" : 27.0,
"avg" : 23.0,
"sum" : 230.0
}
}
}