【Elasticsearch】Mapping APIs

https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html

1、Field datatypes：

2、Meta-Fields：

_index	The index to which the document belongs
_uid	A composite field consisting of the _type and the _id
_type	The document's mapping type
_id	The document's id
_source	The original JSON representing the body of the document
_size	The size of the _source field in bytes,provided by the mapper-size plugin
_all	A catch-all field that indexes the values of all other fields
_field_names
_timestamp
_ttl
_parent	Used to create a parent-child relationship between two mapping types
_routing	A custom routing value which routes a document to a particular shard
_meta	Applicationg specific metadata

3、Mapping parameters

fields:

It is often useful to Index the same filed in different ways for different purposes.This is the purpose of multi-fileds.For instance,a string field could be indexed as an analyzed field for full-text search, and as a not_analyzed field for sorting or aggregations

curl -XPUT 'http://localhost:9200/my_index/_mapping/my_type' -d '{
  "properties": {
    "city": {
      "type": "string",
      "fields": {
        "raw": {                    =>city.raw field is a not_analyzed version of city field
          "type": "string",
          "index": "not_analyzed"
        }
      }
    }
  }
}'

curl -XPUT 'http://localhost:9200/my_index//my_type/1' -d '{
    "city":"New York"
}'

curl -XPUT 'http://localhost:9200/my_index//my_type/2' -d '{
    "city":"York"
}'

curl -XGET 'http://10.224.246.146:9200/my_index/my_type/_search'