为什么 DSL 的查询字符串搜索得分为 1.0

Question

我在一个索引中有数据

下面是前3个文件，我有111个文件。我只削减前 3 个

q = {"size":3,"query":{ "match_all":{}}}

{'took': 1, 'timed_out': False, '_shards': {'total': 1, 'successful': 1, 'skipped': 0, 'failed': 0}, 'hits': {'total': {'value': 111, 'relation': 'eq'}, 'max_score': 1.0, 'hits': [{'_index': 'movie_data_01_03', '_type': '_doc', '_id': '0', '_score': 1.0, '_source': {'id': 0, 'Title': 'The Land Girls', 'US Gross': 146083, 'Worldwide Gross': 146083, 'US DVD Sales': None, 'Production Budget': 8000000, 'Release Date': 'Jun 12 1998', 'MPAA Rating': 'R', 'Running Time min': None, 'Distributor': 'Gramercy', 'Source': None, 'Major Genre': None, 'Creative Type': None, 'Director': None, 'Rotten Tomatoes Rating': None, 'IMDB Rating': 6.1, 'IMDB Votes': 1071}}, {'_index': 'movie_data_01_03', '_type': '_doc', '_id': '1', '_score': 1.0, '_source': {'id': 1, 'Title': 'First Love, Last Rites', 'US Gross': 10876, 'Worldwide Gross': 10876, 'US DVD Sales': None, 'Production Budget': 300000, 'Release Date': 'Aug 07 1998', 'MPAA Rating': 'R', 'Running Time min': None, 'Distributor': 'Strand', 'Source': None, 'Major Genre': 'Drama', 'Creative Type': None, 'Director': None, 'Rotten Tomatoes Rating': None, 'IMDB Rating': 6.9, 'IMDB Votes': 207}}, {'_index': 'movie_data_01_03', '_type': '_doc', '_id': '2', '_score': 1.0, '_source': {'id': 2, 'Title': 'I Married a Strange Person', 'US Gross': 203134, 'Worldwide Gross': 203134, 'US DVD Sales': None, 'Production Budget': 250000, 'Release Date': 'Aug 28 1998', 'MPAA Rating': None, 'Running Time min': None, 'Distributor': 'Lionsgate', 'Source': None, 'Major Genre': 'Comedy', 'Creative Type': None, 'Director': None, 'Rotten Tomatoes Rating': None, 'IMDB Rating': 6.8, 'IMDB Votes': 865}}]}}

下面的查询是否为每个文档提供 _score 1.0？为什么

我正在 elasticsearch 中搜索 Live

query = {'from': 0, 'size': 30, 'query': {'bool': {'must': {'query_string': {'query': '**Live**'}}}}}

我的输出如下

{'took': 23, 'timed_out': False, '_shards': {'total': 1, 'successful': 1, 'skipped': 0, 'failed': 0}, 'hits': {'total': {'value': 3, 'relation': 'eq'}, 'max_score': 1.0, 'hits': [{'_index': 'movie_data_01_03', '_type': '_doc', '_id': '11', '_score': 1.0, '_source': {'id': 11, 'Title': 'Oliver!', 'US Gross': 37402877, 'Worldwide Gross': 37402877, 'US DVD Sales': None, 'Production Budget': 10000000, 'Release Date': 'Dec 11 1968', 'MPAA Rating': None, 'Running Time min': None, 'Distributor': 'Sony Pictures', 'Source': None, 'Major Genre': 'Musical', 'Creative Type': None, 'Director': None, 'Rotten Tomatoes Rating': 84, 'IMDB Rating': 7.5, 'IMDB Votes': 9111}}, {'_index': 'movie_data_01_03', '_type': '_doc', '_id': '52', '_score': 1.0, '_source': {'id': 52, 'Title': 'Alive', 'US Gross': 36299670, 'Worldwide Gross': 36299670, 'US DVD Sales': None, 'Production Budget': 32000000, 'Release Date': 'Jan 15 1993', 'MPAA Rating': 'R', 'Running Time min': None, 'Distributor': 'Walt Disney Pictures', 'Source': 'Based on Book/Short Story', 'Major Genre': 'Adventure', 'Creative Type': 'Dramatization', 'Director': 'Frank Marshall', 'Rotten Tomatoes Rating': 71, 'IMDB Rating': 3.2, 'IMDB Votes': 124}}, {'_index': 'movie_data_01_03', '_type': '_doc', '_id': '90', '_score': 1.0, '_source': {'id': 90, 'Title': 'The Best Years of Our Lives', 'US Gross': 23600000, 'Worldwide Gross': 23600000, 'US DVD Sales': None, 'Production Budget': 2100000, 'Release Date': 'Nov 21 2046', 'MPAA Rating': None, 'Running Time min': None, 'Distributor': 'RKO Radio Pictures', 'Source': 'Based on Book/Short Story', 'Major Genre': 'Drama', 'Creative Type': None, 'Director': 'William Wyler', 'Rotten Tomatoes Rating': 97, 'IMDB Rating': 8.2, 'IMDB Votes': 17338}}]}}

Answer 1

当您搜索 **Live**（即进行通配符搜索）时，默认情况下会应用常量分数，因此您得到的分数为 1.0

您需要添加 rewrite parameter，这将决定相关性得分的计算方式。将您的搜索查询修改为

{
  "from": 0,
  "size": 30,
  "query": {
    "bool": {
      "must": {
        "query_string": {
          "query": "**live**",
          "rewrite": "scoring_boolean"
        }
      }
    }
  }
}

搜索结果将是

"hits": [
      {
        "_index": "66684902",
        "_type": "_doc",
        "_id": "1",
        "_score": 1.3177552,
        "_source": {
          "id": 11,
          "Title": "Oliver!",
          "US Gross": 37402877,
          "Worldwide Gross": 37402877,
          "US DVD Sales": "None",
          "Production Budget": 10000000,
          "Release Date": "Dec 11 1968",
          "MPAA Rating": "None",
          "Running Time min": "None",
          "Distributor": "Sony Pictures",
          "Source": "None",
          "Major Genre": "Musical",
          "Creative Type": "None",
          "Director": "None",
          "Rotten Tomatoes Rating": 84,
          "IMDB Rating": 7.5,
          "IMDB Votes": 9111
        }
      },
      {
        "_index": "66684902",
        "_type": "_doc",
        "_id": "2",
        "_score": 1.3177552,
        "_source": {
          "id": 52,
          "Title": "Alive",
          "US Gross": 36299670,
          "Worldwide Gross": 36299670,
          "US DVD Sales": "None",
          "Production Budget": 32000000,
          "Release Date": "Jan 15 1993",
          "MPAA Rating": "R",
          "Running Time min": "None",
          "Distributor": "Walt Disney Pictures",
          "Source": "Based on Book/Short Story",
          "Major Genre": "Adventure",
          "Creative Type": "Dramatization",
          "Director": "Frank Marshall",
          "Rotten Tomatoes Rating": 71,
          "IMDB Rating": 3.2,
          "IMDB Votes": 124
        }
      },
      {
        "_index": "66684902",
        "_type": "_doc",
        "_id": "3",
        "_score": 0.64896965,
        "_source": {
          "id": 90,
          "Title": "The Best Years of Our Lives",
          "US Gross": 23600000,
          "Worldwide Gross": 23600000,
          "US DVD Sales": "None",
          "Production Budget": 2100000,
          "Release Date": "Nov 21 2046",
          "MPAA Rating": "None",
          "Running Time min": "None",
          "Distributor": "RKO Radio Pictures",
          "Source": "Based on Book/Short Story",
          "Major Genre": "Drama",
          "Creative Type": "None",
          "Director": "William Wyler",
          "Rotten Tomatoes Rating": 97,
          "IMDB Rating": 8.2,
          "IMDB Votes": 17338
        }
      }
    ]

为什么 DSL 的查询字符串搜索得分为 1.0

Why DSL is giving score of 1.0 for query string search

dsl

elasticsearch