ES基礎五 多個索引精確命中個數 查詢

POST /forum/article/_bulk
{ "update": { "_id": "1"} }
{ "doc" : {"title" : "this is java and elasticsearch blog"} }
{ "update": { "_id": "2"} }
{ "doc" : {"title" : "this is java blog"} }
{ "update": { "_id": "3"} }
{ "doc" : {"title" : "this is elasticsearch blog"} }
{ "update": { "_id": "4"} }
{ "doc" : {"title" : "this is java, elasticsearch, hadoop blog"} }

 


GET /forum/article/_search
{"query": {"match_all": {}}}

/java或elasticsearch
GET /forum/article/_search
{"query": {"match": {
  "title": "java elasticsearch"
}}
}

/java和elasticsearch
GET /forum/article/_search
{
  "query": {
    "constant_score": {
      "filter": {
        "match": {
          "title": {
            "query": "java elasticsearch",
            "operator": "and"
          }
        }
      }
    }
  }
}

/java 和elasticsearch
GET /forum/article/_search
{
  "query": {
    "match": {
      "title": {
        "query": " elasticsearch java",
        "operator": "and"
      }
    }
  }
}

/至少包含三個
GET /forum/article/_search
{
  "query": {
    "match": {
      "title": {
        "query": "java elasticsearch spark hadoop",
        "minimum_should_match":"75%" 
        
      }
    }
  }
}
  
 
/bool查詢時，如果有must，should中可以不包含任何單詞，但是should匹配會提高score
GET /forum/article/_search
{
  "query": {
    "bool": {
      "must":     { "match": { "title": "java" }},
      "must_not": { "match": { "title": "spark"  }},
      "should": [
                  { "match": { "title": "hadoop" }},
                  { "match": { "title": "elasticsearch"   }}
      ]
    }
  }
}

/精確到分詞命中具體個數
GET /forum/article/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "match": {
            "title": "java"
          }
        },
        {
          "match": {
            "title": "elasticsearch"
          }
        },
        {
          "match": {
            "title": "hadoop"
          }
        },
        {
          "match": {
            "title": "spark"
          }
        }
      ],
      "minimum_should_match":3
    }
  }
}

 多個條件如何轉為bool查詢

1、普通match如何轉換為term+should

{
    "match": { "title": "java elasticsearch"}
}

使用諸如上面的match query進行多值搜索的時候，es會在底層自動將這個match query轉換為bool的語法
bool should，指定多個搜索詞，同時使用term query

{
  "bool": {
    "should": [
      { "term": { "title": "java" }},
      { "term": { "title": "elasticsearch"   }}
    ]
  }
}

2、and match如何轉換為term+must

{
    "match": {
        "title": {
            "query":    "java elasticsearch",
            "operator": "and"
        }
    }
}

{
  "bool": {
    "must": [
      { "term": { "title": "java" }},
      { "term": { "title": "elasticsearch"   }}
    ]
  }
}

3、minimum_should_match如何轉換

{
    "match": {
        "title": {
            "query":                "java elasticsearch hadoop spark",
            "minimum_should_match": "75%"
        }
    }
}

{
  "bool": {
    "should": [
      { "term": { "title": "java" }},
      { "term": { "title": "elasticsearch"   }},
      { "term": { "title": "hadoop" }},
      { "term": { "title": "spark" }}
    ],
    "minimum_should_match": 3 
  }
}

 boost，可以將某個搜索條件的權重加大,下面的搜索可以看出elasticsearch 的score比較大。

GET /forum/article/_search 
{
  "query": {
    "bool": {
      "must": [
        {
          "match": {
            "title": "blog"
          }
        }
      ],
      "should": [
        {
          "match": {
            "title": {
              "query": "java"
            }
          }
        },
        {
          "match": {
            "title": {
              "query": "hadoop"
            }
          }
        },
        {
          "match": {
            "title": {
              "query": "elasticsearch",
              "boost":5
            }
          }
        } 
      ]
    }
  }
}