首页手记 Elastic Stack从入门到实践之Mapping

Elastic Stack从入门到实践之Mapping

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PHP Java Python

What‘s is Mapping?

自定义mapping

Mapping中的字段类型一旦设定后，禁止直接修改，原因如下：
Lucene实现的倒排索引生成后不允许修改
重新建立新的索引，然后做reindex操作
无法对新增字段进行查询操作

PUT my_index
{
  "mappings": {
    "doc" : {
      "dynamic" : false,
      "properties": {
        "title" : {
          "type":"text"
        },
        "name": {
          "type":"keyword"
        },
        "age": {
          "type": "integer"
        }
      }
    }
  }
}

GET my_index/_mapping

copy_to

DELETE my_index
PUT my_index 
{
  "mappings": {
    "doc": {
      "properties": {
        "first_name": {
          "type": "text",
          "copy_to": "full_name"
        },
        "last_name": {
          "type": "text",
          "copy_to": "full_name"
        },
        "full_name":{
          "type": "text"
        }
      }
    }
  }
}

PUT my_index/doc/1
{
  "first_name": "John",
  "last_name": "Smith"
}

GET my_index/_search
{
  "query": {
    "match": {
      "full_name" : {
        "query": "John",
        "operator": "and"
      }
    }
  }
}