es使用reindex"修改"字段类型

    当使用空间（geo_point）查询或时间（date）查询时，字段类型错误，使用reindex“修改”字段类型，ES不支持支持修改字段类型。

 

思路：

1. 新建索引，执行字段类型
2. 使用reindex将原有数据复制到新索引中

 

设置：

    old_index = users

    old_type = user

    new_index = users_temp

    new_type = user

 

birth_date不是时间类型，location不是geo_point类型 

1. 查询原索引数据

   GET /users/_search

   

2. 查询索引

   GET /users/_mapping

   

3. 新建索引

   PUT /users_temp
   {
   	"mappings": {
   		"user": {
   			"properties": {
   				"age": {
   					"type": "long"
   				},
   				"birth_date": {
   					"type": "date",
   					"format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
   				},
   				"lat": {
   					"type": "float"
   				},
   				"location": {
   					"type": "geo_point"
   				},
   				"lon": {
   					"type": "float"
   				},
   				"sex": {
   					"type": "long"
   				},
   				"user_age": {
   					"type": "integer"
   				},
   				"user_id": {
   					"type": "long"
   				},
   				"user_name": {
   					"type": "text"
   				},
   				"user_sex": {
   					"type": "integer"
   				}
   			}
   		}
   	}
   }

   

4. 使用reindex复制数据

   POST /_reindex
   {
     "source": {
       "index": "users",
       "query": {
         "match_all": {}
       }
     }, 
     "dest": {
       "index": "users_temp"
     }
   }

   

5. 删除原有索引

   DELETE /users

   

6. 创建索引，索引名为原来的索引名

   PUT /users
   {
   	"mappings": {
   		"user": {
   			"properties": {
   				"age": {
   					"type": "long"
   				},
   				"birth_date": {
   					"type": "date",
   					"format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
   				},
   				"lat": {
   					"type": "float"
   				},
   				"location": {
   					"type": "geo_point"
   				},
   				"lon": {
   					"type": "float"
   				},
   				"sex": {
   					"type": "long"
   				},
   				"user_age": {
   					"type": "integer"
   				},
   				"user_id": {
   					"type": "long"
   				},
   				"user_name": {
   					"type": "text"
   				},
   				"user_sex": {
   					"type": "integer"
   				}
   			}
   		}
   	}
   }

   

7. reindex将数据复制回去

   POST /_reindex
   {
     "source": {
       "index": "users_temp",
       "query": {
         "match_all": {}
       }
     }, 
     "dest": {
       "index": "users"
     }
   }

   

8. 删除那个创建的临时索引

   DELETE /users_temp

   

 

查看索引类型

GET /users/_mapping

 

 

数据查询

GET /users/_search

 

 

 

备注：

1. 使用reindex的时候不要修改 type
2. 跨域

   修改${ES_HOME}/config/elasticsearch.yml，加入或修改以下配置 

   1. 修改ES配置

      reindex.remote.whitelist: ["192.168.121.128:9200"]

      ":" 后面有个空格。 

      elasticsearch.yml是在当前机器，白名单指向的是数据来源的机器 

   2. _reindex

      POST /_reindex
      {
        "source": {
          "index": "users",
          "remote": {
            "host": "http://192.168.121.128:9200"
          }
        },
        "dest": {
          "index": "users_temp"
        }
      }