Elasticsearch 更新字段映射 mapping

朱雀 2023-06-16 13:59 24阅读 0赞

**Elasticsearch 不支持现有字段映射更新。可以通过正确创建映射一个新的索引，然后将原索引上的数据复制到新的索引上，再将 alias 指向新 indices。然后再删除原索引。**

1.  ###### 将原索引 test 添加 alias ######
    
        curl -X POST "http://192.168.1.101:9200/_aliases?pretty" -H 'Content-Type: application/json' -d' { "actions": [ { "add": { "index": "test_source", "alias": "test" } } ] } '
    
    或
    
        curl -X PUT "http://192.168.1.101:9200/test_source/_alias/test?pretty"
2.  ###### 创建新索引 test\_new ######
    
        curl -X PUT "http://192.168.1.101:9200/test_new?pretty"
        curl -X POST "http://192.168.1.101:9200/test_new/_mapping?pretty" -H 'Content-Type: application/json' -d' { "properties": { "title": { "type": "text", "analyzer":"ik_max_word", "search_analyzer":"ik_smart" }, "content": { "type": "text", "analyzer":"ik_max_word", "search_analyzer":"ik_smart" }, "author": { "type": "keyword" }, "category": { "type": "keyword" } } } '
    
    查看原索引 mapping
    
        curl -X GET "http://192.168.1.101:9200/test_source/_mapping?pretty"
        { 
          "test_source" : { 
            "mappings" : { 
              "properties" : { 
                "author" : { 
                  "type" : "keyword"
                },
                "category" : { 
                  "type" : "keyword"
                },
                "content" : { 
                  "type" : "text"
                },
                "title" : { 
                  "type" : "text"
                }
              }
            }
          }
        }
3.  ###### 从原索引复制数据到新索引 ######
    
    **注意:** 不宜用于复制数据量过大的索引
    
        curl -X POST "http://192.168.1.101:9200/_reindex?pretty" -H 'Content-Type: application/json' -d' { "source": { "index": "test_source" }, "dest": { "index": "test_new" } } '
4.  ###### 修改别名 ######
    
        curl -X POST "http://192.168.1.101:9200/_aliases?pretty" -H 'Content-Type: application/json' -d' { "actions": [ { "remove" : { "index" : "test_source", "alias" : "test" } }, { "add": { "index": "test_new", "alias": "test" } } ] } '
5.  ###### 删除旧索引 test\_source ######
    
        curl -X DELETE "http://192.168.1.101:9200/test_source?pretty"