[Elastic][Elasticsearch] Query와 Filter의 차이

Query

• score를 계산

Filter

• score를 계산하지 않음
• 상황에 따라 성능 향상 가능

예제

• 데이터

   POST test/_bulk
   {"index":{"_id":"1"}}
   {"text":"aaa"}
   {"index":{"_id":"2"}}
   {"text":"aaa bbb "}
  

• Query
  • 요청

     GET test/_search
     {
     "query": {
       "match": {
         "text": "aaa"
       }
     }
     }
    

  • 응답

     {
     "took" : 0,
     "timed_out" : false,
     "_shards" : {
       "total" : 1,
       "successful" : 1,
       "skipped" : 0,
       "failed" : 0
     },
     "hits" : {
       "total" : {
         "value" : 2,
         "relation" : "eq"
       },
       "max_score" : 0.21110919,
       "hits" : [
         {
           "_index" : "test",
           "_type" : "_doc",
           "_id" : "1",
           "_score" : 0.21110919,
           "_source" : {
             "text" : "aaa"
           }
         },
         {
           "_index" : "test",
           "_type" : "_doc",
           "_id" : "2",
           "_score" : 0.160443,
           "_source" : {
             "text" : "aaa bbb "
           }
         }
       ]
     }
     }
    

• Filter
  • 요청

     GET test/_search
     {
     "query": {
       "bool": {
         "filter": [
       {
             "match": {
               "text": "aaa"
             }
           }
         ]
       }
     }
     }
    

  • 응답

     {
     "took" : 0,
     "timed_out" : false,
     "_shards" : {
       "total" : 1,
       "successful" : 1,
       "skipped" : 0,
       "failed" : 0
     },
     "hits" : {
       "total" : {
         "value" : 2,
         "relation" : "eq"
       },
       "max_score" : 0.0,
       "hits" : [
         {
           "_index" : "test",
           "_type" : "_doc",
           "_id" : "1",
           "_score" : 0.0,
           "_source" : {
             "text" : "aaa"
           }
         },
         {
           "_index" : "test",
           "_type" : "_doc",
           "_id" : "2",
           "_score" : 0.0,
           "_source" : {
             "text" : "aaa bbb "
           }
         }
       ]
     }
     }