ElasticSearch 查询：查询必须至少匹配多个值之一

Question

我需要 ElasticSearch 查询的帮助，我需要将 SHOULD 和 MUST 结合起来，但我不知道该怎么做：

这是我想做的查询示例：

    ap_code= ["ta", "All"] (OR condition)

    AND

    ra_code= ["ph", "All"] (OR condition)

    AND

    city = ["London"] 

这是查询，但它从 ES 获取所有结果

"bool" : {
    "must" : [
      {
        "match_phrase" : {
          "city" : {
            "query" : "London",
            "slop" : 0,
            "zero_terms_query" : "NONE",
            "boost" : 1.0
          }
        }
      }
    ],
    "should" : [
      {
        "match_phrase" : {
          "ra_code" : {
            "query" : "ph",
            "slop" : 0,
            "zero_terms_query" : "NONE",
            "boost" : 1.0
          }
        }
      },
      {
        "match_phrase" : {
          "ra_code" : {
            "query" : "All",
            "slop" : 0,
            "zero_terms_query" : "NONE",
            "boost" : 1.0
          }
        }
      },
      {
        "match_phrase" : {
          "ap_code" : {
            "query" : "All",
            "slop" : 0,
            "zero_terms_query" : "NONE",
            "boost" : 1.0
          }
        }
      },
      {
        "match_phrase" : {
          "ap_code" : {
            "query" : "ta",
            "slop" : 0,
            "zero_terms_query" : "NONE",
            "boost" : 1.0
          }
        }
      }
    ],
    "adjust_pure_negative" : true,
    "boost" : 1.0
  }
}

我使用 Java API 创建查询（JDK 11）

请问有什么帮助吗？ 提前致谢

Answer 1

您可以在如下所示的 must 子句中使用 should 查询。

{
  "query": {
    "bool": {
      "must": [
        {
          "match_phrase": {
            "city": {
              "query": "London",
              "slop": 0,
              "zero_terms_query": "NONE",
              "boost": 1
            }
          }
        },
        {
          "bool": {
            "should": [
              {
                "match_phrase": {
                  "ra_code": {
                    "query": "ph",
                    "slop": 0,
                    "zero_terms_query": "NONE",
                    "boost": 1
                  }
                }
              },
              {
                "match_phrase": {
                  "ra_code": {
                    "query": "All",
                    "slop": 0,
                    "zero_terms_query": "NONE",
                    "boost": 1
                  }
                }
              }
            ],
            "minimum_should_match": 1
          }
        },
        {
          "bool": {
            "should": [
              {
                "match_phrase": {
                  "ap_code": {
                    "query": "ta",
                    "slop": 0,
                    "zero_terms_query": "NONE",
                    "boost": 1
                  }
                }
              },
              {
                "match_phrase": {
                  "ap_code": {
                    "query": "All",
                    "slop": 0,
                    "zero_terms_query": "NONE",
                    "boost": 1
                  }
                }
              }
            ],
            "minimum_should_match": 1
          }
        }
      ]
    }
  }
}

对于 Java api，您可以尝试以下操作

BoolQueryBuilder first = QueryBuilders.boolQuery()
    .should(QueryBuilders.matchQuery(field1, value1))
    .should(QueryBuilders.matchQuery(field2, value2));

BoolQueryBuilder second= QueryBuilders.boolQuery()
    .should(QueryBuilders.matchQuery(field1, value1))
    .should(QueryBuilders.matchQuery(field2, value2));


BoolQueryBuilder filter = new BoolQueryBuilder()
    .must(first)
    .must(second);