Elasticsearch 相当于具有多个字段的 SQL In Query

Question

我正在寻找 Elasticsearch 等效的 SQL In 查询，如下所示

SELECT * from table
WHERE (section , class) in (('a','1'), ('b', '2'))

我知道如何在elasticsearch中使用In query来查询单个字段

SELECT * FROM table WHERE class IN ('1', '2');

Elasticsearch 查询 -

{
  "query" : {
    "bool" : {
      "filter" : {
        "terms" : {
          "class" : ['1', '2']
        }
      }
    }
  }
}

我的实际问题陈述 -

索引数据示例:

[
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "41",
    "_score" : 1.0,
    "_source" : {
      "class" : "1",
      "section" : "a",
      "attribute_3" : "hello world"
},
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "42",
    "_score" : 1.0,
    "_source" : {
      "class" : "2",
      "section" : "a",
      "attribute_3" : "hello world"
},
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "43",
    "_score" : 1.0,
    "_source" : {
      "class" : "1",
      "section" : "b",
      "attribute_3" : "hello world"
},
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "44",
    "_score" : 1.0,
    "_source" : {
      "class" : "2",
      "section" : "b",
      "attribute_3" : "hello world"
},
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "45",
    "_score" : 1.0,
    "_source" : {
      "class" : "3",
      "section" : "b",
      "attribute_3" : "hello world"
}
]

我想对数据使用过滤器，其中(类为 1 AND 部分为 a)OR(类为 2 AND 部分为 b) 注意:我正在动态准备这个“OR”组合，并且它将是两个以上的组合。

我预期的搜索结果应该是 -

[{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "41",
    "_score" : 1.0,
    "_source" : {
      "class" : "1",
      "section" : "a",
      "attribute_3" : "hello world"
},
{
    "_index" : "some_index",
    "_type" : "_doc",
    "_id" : "44",
    "_score" : 1.0,
    "_source" : {
      "class" : "2",
      "section" : "b",
      "attribute_3" : "hello world"
}]

Answer 1

这将转化为:

{
  "query": {
    "bool": {
      "should": [
        {
          "bool": {
            "must": [
              {
                "term": {
                  "a": 0
                }
              },
              {
                "term": {
                  "b": 9
                }
              }
            ]
          }
        },
        {
          "bool": {
            "must": [
              {
                "term": {
                  "a": 0
                }
              },
              {
                "term": {
                  "b": 4
                }
              }
            ]
          }
        }
      ]
    }
  }
}

但如果 a 始终为 0，如您在示例中提到的，则查询可以改写为:

{
  "query": {
    "bool": {
      "must": [
        {
          "term": {
            "a": 0
          }
        },
        {
          "terms": {
            "b": [
              9,
              4
            ]
          }
        }
      ]
    }
  }
}