percolator接口里的agg怎么用？

agg和highlight等操作都是作用于『percolator』存储的JSON，除了query，你还可以自己定义其他字段，所以和正常的agg操作一样，你可以对percolator的对象进行统计和高亮之类

PUT /medcl/.percolator/1

{

    "query" : {

        "match" : {

            "message" : "bonsai tree"

        }

    },

    "tag":"bonsai_tree"

}

PUT /medcl/.percolator/bonsai

{

    "query" : {

        "match" : {

            "message" : "bonsai"

        }

    },"tag":"bonsai"

}



GET /medcl/type/_percolate

{

    "doc" : {

        "message" : "bonsai tree"

    },

    "aggs": {

      "query" : {

            "terms" : { "field" : "tag" }

        }

    }

    ,"highlight" : {

        "pre_tags" : ["<pre>"],

        "post_tags" : ["</pre>"],

        "fields" : {

            "message" : {}

        }

    },"size":10

}

{

  "took": 44,

  "_shards": {

    "total": 5,

    "successful": 5,

    "failed": 0

  },

  "total": 2,

  "matches": [

    {

      "_index": "medcl",

      "_id": "bonsai",

      "highlight": {

        "message": [

          "<pre>bonsai</pre> tree"

        ]

      }

    },

    {

      "_index": "medcl",

      "_id": "1",

      "highlight": {

        "message": [

          "<pre>bonsai</pre> <pre>tree</pre>"

        ]

      }

    }

  ],

  "aggregations": {

    "query": {

      "doc_count_error_upper_bound": 0,

      "sum_other_doc_count": 0,

      "buckets": [

        {

          "key": "bonsai",

          "doc_count": 1

        },

        {

          "key": "bonsai_tree",

          "doc_count": 1

        }

      ]

    }

  }

}