在Elasticsearch中match和bool必须匹配查询有什么区别 [英] What is difference between match and bool must match query in Elasticsearch

问题描述

在ES中，仅 match和bool必须匹配查询有什么区别？

What is the difference between Only match and bool must match query in ES?

首先，仅使用匹配查询

{
   "query":{
      "match":{
         "address":"mill"
      }
   }
}

第二，使用复合查询

{
  "query": {
    "bool": {
      "must": [
        { "match": { "address": "mill" } }
      ]
     }
   }
}

你能告诉我一切吗？
它们之间有什么区别？

Can you tell me everything? What is difference between them?

推荐答案

仅使用一次匹配项布尔必须子句中的c $ c>则没有区别，当您要组合多个（布尔）条件时，布尔子句很有用，有关官方ES文档。它支持以下条件。

When you use only one match inside a bool must clause then there is no difference, the bool clause is useful when you want to combine multiple(boolean) criteria, more info on official ES doc. It supports below criteria.

1. 必须


2. 必须不


3. 过滤器


4. 应该

1. must
2. must_not
3. filter
4. should

让我以您的问题中的一个小例子为例。

Let me show by taking a small example from your question.

{
    "mappings": {
        "properties": {
            "address": {
                "type": "text"
            },
            "first_name" :{
                "type" : "text"
            }
        }
    }
}

索引3文档，都具有相同的地址工厂，但具有不同的 first_name

Index 3 docs, all having same address mill, but different first_name

{
   "address" : "mill",
   "first_name" : "Johnson"
}

{
   "address" : "mill",
   "first_name" : "Parker"
}

{
   "address" : "mill",
   "first_name" : "opster"
}

搜索查询以显示所有工厂的地址，但必须不包含名字为 parker

Search query to show all adresses of mill but must_not contain first_name as parker

{
    "query": {
        "bool": {
            "must": [
                {
                    "match": {
                        "address": "mill"
                    }
                },
                {
                    "must_not": {
                        "first_name": "parker"
                    }
                }
            ]
        }
    }
}

仅结果2个地址

Result only 2 address

"hits": [
         {
            "_index": "so-60620921-bool",
            "_type": "_doc",
            "_id": "2",
            "_score": 0.13353139,
            "_source": {
               "address": "mill",
               "first_name": "opster"
            }
         },
         {
            "_index": "so-60620921-bool",
            "_type": "_doc",
            "_id": "3",
            "_score": 0.13353139,
            "_source": {
               "address": "mill",
               "first_name": "Johnson"
            }
         }
      ]

基于OP注释，提供查询和过滤器上下文，以详细了解性能方面。

Based on the OP comments, providing the query and filter context, to understand the performance aspects in details.

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