ElasticSearch5.x实践_day05_02_Mapping的写入、查看与修改

首先建立一个索引:html

POST http://192.168.20.46:9200/my_index/my_type/1
{"name":"zhangsan"}

如今只建立了一个索引,并无设置mapping,查看一下索引mapping的内容:json

GET http://192.168.20.46:9200/my_index/_mapping?pretty
{
    "my_index": {
        "mappings": {
            "my_type": {
                "properties": {
                    "name": {
                        "type": "text",
                        "fields": {
                            "keyword": {
                                "type": "keyword",
                                "ignore_above": 256
                            }
                        }
                    }
                }
            }
        }
    }
}

下面给productindex这个索引加一个type,type name为 product 并设置mapping:app

PUT http://192.168.20.46:9200/my_index
{
	"mappings":{
		"product":{
			"properties":{
				"title":{
					"type":"text",
					"store":"yes"
				},
				"description":{
					"type":"keyword",
					"index":"not_analyzed"
				},
				"price":{
					"type":"double"
				},
				"onSale":{
					"type":"boolean"
				},
				"type":{
					"type":"integer"
				},
				"createDate":{
					"type":"date"
				}
			}
		}
	}
}

查看一下索引mapping的内容:code

ttp://192.168.20.46:9200/my_index/_mapping?pretty

{
    "my_index": {
        "mappings": {
            "product": {
                "properties": {
                    "createDate": {
                        "type": "date"
                    },
                    "description": {
                        "type": "keyword"
                    },
                    "onSale": {
                        "type": "boolean"
                    },
                    "price": {
                        "type": "double"
                    },
                    "title": {
                        "type": "text",
                        "store": true
                    },
                    "type": {
                        "type": "integer"
                    }
                }
            }
        }
    }
}

上面的操做中,咱们给productindex加了一个type,并写入了product的mapping信息,再次查看:htm

PUT http://192.168.20.46:9200/my_index/_mapping/product
{
    "product": {
        "properties": {
            "english_title": {
                "type":     "string",
                "analyzer": "english"
            }
        }
    }
}

 

GET http://192.168.20.46:9200/my_index/_mapping?pretty
{
    "my_index": {
        "mappings": {
            "product": {
                "properties": {
                    "createDate": {
                        "type": "date"
                    },
                    "description": {
                        "type": "keyword"
                    },
                    "english_title": {
                        "type": "text",
                        "analyzer": "english"
                    },
                    "onSale": {
                        "type": "boolean"
                    },
                    "price": {
                        "type": "double"
                    },
                    "title": {
                        "type": "text",
                        "store": true
                    },
                    "type": {
                        "type": "integer"
                    }
                }
            }
        }
    }
}

字段的type类型是不能修改的,为何不能修改一个字段的type?缘由是一个字段的类型修改之后,那么该字段的全部数据都须要从新索引。Elasticsearch底层使用的是lucene库,字段类型修改之后索引和搜索要涉及分词方式等操做,不容许修改类型看来是符合lucene机制的。
这里有一篇关于修改mapping字段的博客,叙述的比较清楚:Elasticsearch 的坑爹事——记录一次mapping field修改过程,能够参考.blog

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