es修改字段类型

概述

首先说明es中索引的字段类型是不可修改的，只能是重新创建一个索引并设置好mapping，然后再将老索引的数据复制过去。

操作步骤

1、创建索引，并指定mapping

PUT /web-log
{
    "mappings" : {
      "properties" : {
        "classMethod" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "consumeTime" : {
          "type" : "long"
        },
        "consumeTimeType" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "date" : {
          "type" : "date",
          "format": "yyyy-M-d"
        },
        "day" : {
          "type" : "long"
        },
        "hour" : {
          "type" : "long"
        },
        "ip" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "minute" : {
          "type" : "long"
        },
        "month" : {
          "type" : "long"
        },
        "requestArgs" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "requestId" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "requestMethod" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "second" : {
          "type" : "long"
        },
        "threadID" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "timestamp" : {
          "type" : "long"
        },
        "userName" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "year" : {
          "type" : "long"
        }
      }
    }
  }

2. 将老的索引中的数据复制到新的索引中：

POST _reindex
{
  "source": {
    "index": "web_log"
  },
  "dest": {
    "index": "web-log"
  }
}

最后成功了

最后

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