ES实战-高级聚合

多桶型聚合
1.词条聚合–terms
2.范围聚合–range
3,直方图聚合–histogram/日期直方图
4.嵌套聚合
5.地理距离聚合
include(包含)exclude(不包含)

GET /get-together/_search?pretty
{"size": 0,"aggs": {"tags": {"terms": {"field": "tags.verbatim","include": ".*search.*"}}}
}

range范围聚合统计

GET /get-together/_search
{"aggs": {"attendees_breakdown": {"range": {"script": {"source": "doc['attendees'].size()"},"ranges": [{"to": 4},{"from": 4,"to": 6},{"from": 6}]}}}
}

histogram定义一个固定间距,es会自动构建范围.

#ES会构建从最小值开始的范围,并不断加入interval,
#直到包含最大值
GET /get-together/_search
{"aggs": {"attendees_histogram": {"histogram": {"script": {"source": "doc['attendees'].size()"},"interval": 1}}}
}

通过嵌套聚合获得结果分组