在 ElasticSearch 中，有没有办法获取 ES 为 term 查询请求返回的每个匹配项的匹配项数？

Question

For a given term query search request, will i be able to find the number terms matched for each of the value returned by ElasticSearch?

If suppose i have a input as -

{
    "query": {
        "match" : {
            "message" : "this is a test"
        }
    }
}

and for this if suppose i get matched values as - 'this man' and 'this man test'.

here the number of terms matched wrt the request for 'this man' is 1 and for 'this man test' is 2.

Is there a way to directly get this number in the response?

Answer 1

You can do a terms aggregation to count exact sentences :

  "query": {
    "match": {
      "message": "this is a test"
    }
  },
  "aggs": {
    "genres": {
      "terms": {
        "field": "message.keyword"
      }
    }
  }

Note that will need a mapping with a text (for the match query) and a keyword (for the agg). This is the default mapping in ElasticSearch.

Depends of your need Significant text aggregation may also interest you