【Elasticsearch系列】索引的mappings映射

index：默认true，设置为false的话，那么这个字段就不会被索引
引用官文：
https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping-index.html

index

The index option controls whether field values are indexed. It accepts true or false and defaults to true. Fields that are not indexed are not queryable.

PUT     /index_str
{
    "mappings": {
        "properties": {
            "realname": {
            	"type": "text",
            	"index": true
            },
            "username": {
            	"type": "keyword",
            	"index": false
            }
        }
    }
}

GET         /index_mapping/_analyze
{
	"field": "realname",
	"text": "imooc is good"
}

POST        /index_str/_mapping
{
    "properties": {
        "name": {
        	   "type": "long"
        }
    }
}

POST        /index_str/_mapping
{
    "properties": {
        "id": {
        	"type": "long"
        },
        "age": {
        	"type": "integer"
        },
        "nickname": {
            "type": "keyword"
        },
        "money1": {
            "type": "float"
        },
        "money2": {
            "type": "double"
        },
        "sex": {
            "type": "byte"
        },
        "score": {
            "type": "short"
        },
        "is_teenager": {
            "type": "boolean"
        },
        "birthday": {
            "type": "date"
        },
        "relationship": {
            "type": "object"
        }
    }
}

注：某个属性一旦被建立，就不能修改了，但是可以新增额外属性

• text, keyword, string
• long, integer, short, byte
• double, float
• boolean
• date
• object
• 数组不能混，类型一致

text：文字类需要被分词被倒排索引的内容
keyword：不会被分词，不会被倒排索引，直接匹配搜索