ElasticSearch中关键字和文本的区别 [英] Difference between keyword and text in ElasticSearch

问题描述

谁能用一个例子解释一下 ElasticSearch 中关键字和文本的区别?

Can someone explain the difference between keyword and text in ElasticSearch with an example?

推荐答案

关键字 type:如果您将字段定义为这样的关键字类型.

keyword type: if you define a field to be of type keyword like this.

 PUT products
{
  "mappings": {
    "_doc": {
      "properties": {
        "name": {
          "type": "keyword"
        }
      }
    }
  }
}

然后，当您对该字段进行搜索查询时，您必须插入整个值(关键字搜索)，因此关键字字段.

Then when you make a search query on this field you have to insert the whole value (keyword search) so keyword field.

 POST products/_doc
{
  "name": "washing machine"
}

当你像这样执行搜索时:

when you execute search like this:

 GET products/_search
{
  "query": {
    "match": {
      "name": "washing"
    }
  }
}

它不会匹配任何文档.你必须用洗衣机"这个词来搜索.

it will not match any docs. You have to search with the whole word "washing machine".

text 类型被分析，您可以使用字段值中的标记进行搜索.在整个值中进行全文搜索:

text type on the other hand is analyzed and you can search using tokens from the field value. a full text search in the whole value:

    PUT products
{
  "mappings": {
    "_doc": {
      "properties": {
        "name": {
          "type": "text"
        }
      }
    }
  }
}

和搜索:

 GET products/_search
{
  "query": {
    "match": {
      "name": "washing"
    }
  }
}

将返回一个匹配的文件.

will return a matching documents.

您可以查看更多详细信息关键字 Vs.文字

You can check this to more details keyword Vs. text

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