Elasticsearch Getting Started with (ii) Mapping + field type

Elasticsearch Reference [6.2]? Mapping
Refer to the official English document Https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html

Mapping is the process of defining how a document and the fields it contains are stored and indexed, each with a mapping type that determines how the document will be indexed.

Meta-fields
Include _index,_type,_id and _source fields for documents

es field data type :
Https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-types.html

2. String type
   Text, keyword
4. Numeric type
   Long, integer, short, Byte, double, float, half_float, scaled_float
6. Date type
   Date
8. Boolean value type
   Boolean
10. Binary type
    Binary
12. Range type
    Integer_range, Float_range, Long_range, Double_range, Date_range

14. Array data type (array does not need to define a special type)

    "one","two"1,2 ][{"name":"Mary","age":12},{"name":"John","age":10}]

16. Object data type (JSON nested)

    {   "region":"US",  "manager":{"age":     30,"name":{   "first":"John",  "last":  "Smith"}  }}

18. Geographic data types
    Geo-point,geo-shape (more complex, refer to official website documents, generally with geo-point on it)

20. Special data types
    IP (IPV4 and IPV6 addresses)
    Completion (auto-complete/search)
    Token_count (numeric type, parsing string, number of indexes)
    MURMUR3 (the ability to calculate the hash of field values at index time and store them in the index.) Very helpful when running cardinality aggregations on high cardinality and large string fields)
    Join (Create parent/child relationships in documents of the same index)

The following is a common parameter type definition & Assignment Demo

type	parameter Definition	Assign Value
Text	' name ': {' type ': ' Text '}	"Name": "Zhangsan"
Keyword	"Tags": {"type": "Keyword"}	"Tags": "abc"
Date	"Date": {"type": "Date"}	"Date": "2015-01-01t12:10:30z"
Long	"Age": {"type": "Long"}	"Age": 28
Double	"Score": {"type": "Double"}	"Score": 98.8
Boolean	"Isgirl": {"type": "Boolean"}	"Isgirl": True
Ip	"Ip_addr": {"type": "IP"}	"Ip_addr": "192.168.1.1"
Geo_point	"Location": {"type": "Geo_point"}	"Location": {"lat": 40.12, "lon":-71.34}

Mapping parameters

Https://www.elastic.co/guide/en/elasticsearch/reference/6.2/mapping-params.html

Mapping Parameters	Notes
Analyzer
Normalizer
Boost
Coerce
Copy_to
Doc_values
Dynamic
Enabled
Fielddata
Eager_global_ordinals
Format
Ignore_above
Ignore_malformed
Index_options
Index
Fields
Norms
Null_value
Position_increment_gap
Properties
Search_analyzer
Similarity
Store
Term_vector

Elasticsearch Getting Started with (ii) Mapping + field type