elasticsearch query_string 使用或运算符的关键字搜索不起作用

Question

我已经为这个问题创建了一个简单的复制器，如下所示：

PUT trial
{
  "settings": {
    "analysis": {
      "analyzer": {
        "default": {
          "type": "custom",
          "tokenizer": "whitespace",
          "filter": [ "lowercase" ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "status": {
        "type": "keyword"
      }
    }
  }
}
PUT trial/_doc/2
{
  "status": "not_installed"
}

PUT trial/_doc/1
{
  "status": "installed"
}
POST trial/_search
{
  "from": 0,
  "size": 20,
  "query": {
    "bool": {
      "filter": [
        {
          "query_string": {
            "query": "not_installed installed",
            "default_operator": "or"
          }
        }
      ]
    }
  }
}

如果我从上到下一条一条地执行这些命令，我希望得到 doc 1,2 作为结果。但它没有被获取。我的理解有什么问题？有人可以帮忙吗？使用 ES 版本 7.4

Answer 1

试试下面的搜索查询（采用相同的索引映射和数据）

{
  "from": 0,
  "size": 20,
  "query": {
    "bool": {
      "filter": [
        {
          "query_string": {
            "query": "not_installed OR installed"
          }
        }
      ]
    }
  }
}

以上查询给出了预期的结果。要了解有关 query_string 的更多信息，请参阅此 documentation。

更新 1：

Elasticsearch relies on the analyzer to split everything that is in-between query operators into terms. And the analyzer on keyword fields is a keyword analyzer.

So there has to be a way to configure keyword fields so that text would be split on whitespace at query time. Therefore, split_queries_on_whitespace parameter is added to the field that sets a whitespace analyzer as a search analyzer when set to true. By adding this parameter and setting it to true full-text queries (match, multi_match, query_string,..) that target the field will split the input on whitespace to build the query terms.

请参阅这些 GitHub 问题以了解更多信息：

https://github.com/elastic/elasticsearch/issues/29148 https://github.com/elastic/elasticsearch/issues/30131 https://github.com/elastic/elasticsearch/issues/30393 https://github.com/elastic/elasticsearch/pull/30691

在您的情况下，您需要将 split_queries_on_whitespace 参数添加到关键字字段，以便在为字段 status 构建查询时拆分空格输入。要了解更多信息，请参阅 Keyword datatype.

上的官方文档

索引映射：

修改后的映射将如下所示：

{
  "settings": {
    "analysis": {
      "analyzer": {
        "default": {
          "type": "custom",
          "tokenizer": "whitespace",
          "filter": [ "lowercase" ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "status": {
        "type": "keyword",
        "split_queries_on_whitespace": true   --> note this
      }
    }
  }
}

搜索查询：

{
  "from": 0,
  "size": 20,
  "query": {
    "bool": {
      "filter": [
        {
          "query_string": {
            "query": "installed not_installed",
            "default_operator":"OR"
          }
        }
      ]
    }
  }
}

搜索结果：

"hits": [
      {
        "_index": "my_index",
        "_type": "_doc",
        "_id": "1",
        "_score": 0.0,
        "_source": {
          "status": "not_installed"
        }
      },
      {
        "_index": "my_index",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.0,
        "_source": {
          "status": "installed"
        }
      }
    ]

elasticsearch query_string 使用或运算符的关键字搜索不起作用

elasticsearch query_string keyword search with or operator not working

elasticsearch

query-string