One . mapping Index attribute

Two . Operation of index library

1. Create index library

example ：

# Create index library 
PUT /heima
{
  "mappings": {
    "properties": {
      "info": {
        "type": "text",
        "analyzer": "ik_smart"
      },
      "email": {
        "type": "keyword",
        "index": false
      },
      "name": {
        "type": "object",
        "properties": {
          "firstname": {
            "type": "keyword"
          },
          "lastname": {
            "type": "keyword"
          }
        }
      }
    }
  }
}

2. Other operations of the index library （ see , Delete , modify （ Only new fields can be added ））：

ps: After the index library is created

         Theoretically, it can be modified

         But in actual development , yes No modification Of the original field （ But you can add new fields ）, Because the revision will The impact on performance is great Of , It may make the whole library unavailable

（ example ） Code ：

#  Inquire about 
GET /heima

#  Modify the index library , Add new fields 
PUT /heima/_mapping
{
  "properties": {
    "age": {
      "type": "integer"
    }
  }
}

#  Delete 
DELETE /heima