[Elasticsearch] ES修改字段类型
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参考：https://blog.csdn.net/weixin_41228362/article/details/107382647
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"
- 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
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