dynamic

true：插入值的字段没在mappings中定义，会新增字段
false：插入值的字段没在mappings中定义，不会新增字段，但也不会报错
strict：插入值的字段没在mappings中定义，会报错

PUT my_index
{
  "mappings": {
    "doc": {
      "dynamic": false,
      "properties": {
        "title": {
          "type": "text"
        },
        "name": {
          "type": "keyword"
        },
        "age": {
          "type": "integer"
        }
      }
    }
  }
}
GET my_index/_mapping
PUT my_index/doc/1
{
  "title": "hello baozi",
  "desc": "nothing"
}
GET my_index/doc/_search
{
  "query": {
    "match": {
      "title": "hello"
    }
  }
}
GET my_index/doc/_search
{
  "query": {
    "match": {
      "desc": "nothing"
    }
  }
}

copy_to

copy_to的字段不会被存储

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": "B",
  "last_name": "aozi"
}
GET my_index/doc/_search
{
  "query": {
    "match": {
      "full_name": {
        "query": "B aozi",
        "operator": "and"
      }
    }
  }
}

index

运行之后会保存，因为index设置为false

PUT my_index
{
  "mappings": {
    "doc": {
      "properties": {
        "cookie": {
          "type": "text",
          "index": false
        }
      }
    }
  }
}
PUT my_index/doc/1
{
  "cookie": "name=baozi"
}
GET my_index/doc/_search
{
  "query": {
    "match": {
      "cookie": "name"
    }
  }
}

index_options

用于控制倒排索引记录的内容，text类型默认为position

• docs 记录doc id
• freqs 记录doc id、term frequencies
• positions 记录doc id、term frequencies、term position
• offsets 记录doc id、term frequencies、term position和character offsets

null_value

遇到null值时怎么处理