elasticsearch中field属性（数据类型）

field相当于mysql中的每个列，因此具备数据类型：整数、浮点、字符串、date等等

官网文档，https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html

字符串类型：string¶

text：文本类型，一般用于全文检索，可以被分词器拆分
keyword：被当做一个单词，不能被分词器拆分

数值类型：number¶

long	A signed 64-bit integer with a minimum value of
integer	A signed 32-bit integer with a minimum value of
short	A signed 16-bit integer with a minimum value of
byte	A signed 8-bit integer with a minimum value of
double	A double-precision 64-bit IEEE 754 floating point number, restricted to finite values.
float	A single-precision 32-bit IEEE 754 floating point number, restricted to finite values.
half_float	A half-precision 16-bit IEEE 754 floating point number, restricted to finite values.
scaled_float	A floating point number that is backed by a
unsigned_long	An unsigned 64-bit integer with a minimum value of 0 and a maximum value of

时间类型：date¶

可以指定具体的输入制定格式

PUT my-index-000001
{
  "mappings": {
    "properties": {
      "date": {
        "type":   "date",
        "format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
      }
    }
  }
}

布尔类型：boolean¶

false和true

二进制类型：Binary¶

暂时仅支持将二进制转换为base64编号的字符串

范围数据类型：range¶

long_range：赋值时，仅需存储范围即可，gt、lt、gte、lte
integer_rang：同上
double_range：同上
float_range：同上
date_range：同上
ip_range：同上

经纬度类型：geo¶

geo_point:存储经纬度

ip类型：¶

ip：可以存储ipv4或ipv6