Elastic Stack从入门到实践之Mapping

Mapping中的字段类型一旦设定后，禁止直接修改，原因如下：
Lucene实现的倒排索引生成后不允许修改
重新建立新的索引，然后做reindex操作
无法对新增字段进行查询操作

PUT my_index
{
  "mappings": {
    "doc" : {
      "dynamic" : false,
      "properties": {
 "title" : {
   "type":"text"
 },
 "name": {
   "type":"keyword"
 },
 "age": {
   "type": "integer"
 }
      }
    }
  }
}

GET my_index/_mapping

DELETE my_index
PUT my_index 
{
  "mappings": {
    "doc": {
      "properties": {
 "first_name": {
   "type": "text",
   "copy_to": "full_name"
 },
 "last_name": {
   "type": "text",
   "copy_to": "full_name"
 },
 "full_name":{
   "type": "text"
 }
      }
    }
  }
}

PUT my_index/doc/1
{
  "first_name": "John",
  "last_name": "Smith"
}

GET my_index/_search
{
  "query": {
    "match": {
      "full_name" : {
 "query": "John",
 "operator": "and"
      }
    }
  }
}

私密信息，节省空间（因为该字段不再使用倒排索引搜索）

• text分词,keyword不分词

ES有一些自带的模板，小心和自定义模板引起冲突