簡體   English   中英

如何在Elasticsearch 2.x的過濾查詢中使用OR

[英]How to use OR in a filtered query with Elasticsearch 2.x

我正在使用Elasticsearch 2.4,並且嘗試獲取行為類似於以下SQL語句的查詢:

SELECT * FROM countries WHERE continent='Europe' and (country='Andorra' OR cities in ['Madrid'])

在Elasticsearch 1.5中,我使用以下查詢使其工作:

{  
   "query": {
     "filtered": {
       "filter": {
         "term": {
           "continent": "Europe"
        }
     },
      "query": {
        "bool": {
          "should": [
            {
              "nested": {
                "path": "cities",
                "query": {
                  "match": {
                    "cities.name": "Madrid"
                  }
                }
              }
            },
            {
              "match": {
                "country": "Andorra"
              }
            }
          ]
        }
      }
    }
  }
}

但是似乎在2.x版本中, 不推薦使用 “過濾”參數。 我嘗試使用使用filter的新方法來構建查詢,但是它找不到正確的嵌套值 這是結果查詢:

{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "continent": "Europe"
          }
        }
      ],
      "should": [
        {
          "nested": {
            "path": "cities",
            "query": {
              "match": {
                "cities.name": "Madrid"
              }
            }
          }
        },
        {
          "match": {
            "country": "Andorra"
          }
        }
      ]
    }
  }
}

這是我要獲取的數據:

{
    "_index":"countries",
    "_type":"item", 
    "_id":"123",
    "_version":1,
    "found":true,
    "_source":{
        "country": "Spain",
        "cities": [
                    {
                        "id_city": 2133, 
                        "name": "Madrid"
                    }, 
                    {
                        "id_city": 8382, 
                        "name": "Barcelona"
                    }
                  ] 
    }
}

有人知道實現此目標的正確方法嗎?

查看是否可行:

 {
        "query" : {
            "bool" : {
                "should" : [{
                        "nested" : {
                            "path" : "cities",
                            "query" : {
                                "match" : {
                                    "cities.name" : "Madrid"
                                }
                            }
                        }
                    }, {
                        "match" : {
                            "country" : "Spain"
                        }
                    }
                ],
                "filter" :
                [{
                        "term" : {
                            "continent" : "Europe"
                        }
                    }
                ]
            }
        }
    }

其實我是這樣工作的:

{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "continent": "Europe"
          }
        }
      ],
      "must": [
        {
          "bool": {
            "should": [
              {
                "nested": {
                  "path": "cities",
                  "query": {
                    "match": {
                      "cities.name": "Madrid"
                    }
                  }
                }
              },
              {
                "match": {
                  "country": "Andorra"
                }
              }
            ]
          }
        }
      ]
    }
  }
}

我知道..很奇怪,但是如果查詢與主查詢中使用“應該”而不是“必須”的任何術語都不匹配,則會從Europe返回很多隨機結果。

如果您的bool查詢具有filtermust子句,則should子句不需要具有任何匹配項即可獲取結果。 如果是獨立的,則需要具有1個匹配項。 在文檔中, 網址為: https : //www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-query.html

因此,嘗試一下,並使用"minimum_should_match": 1強制至少匹配"minimum_should_match": 1

{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "continent": "Europe"
          }
        }
      ],
      "should": [
        {
          "nested": {
            "path": "cities",
            "query": {
              "match": {
                "cities.name": "Madrid"
              }
            }
          }
        },
        {
          "match": {
            "country": "Andorra"
          }
        }
      ],
      "minimum_should_match": 1
    }
  }
}

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM