环境:
es版本:6.5.0
es创建好了mapping后是不允许修改字段类型的,要是我们想修改字段类型怎么办呢,我们可以采用reindex的方法实现,就是创建一个新的mapping,里面的字段类型按照新的类型定义,然后使用reindex的方法把原来的数据拷贝到新的index下面。
1.查看原来的mapping
[esuser@localhost ~]$ curl -u elastic:elastic -H "Content-Type: application/json" -XGET "http://192.168.1.85:9200/db_customer/_mappings?pretty=true" { "db_customer" : { "mappings" : { "tb_test" : { "properties" : { "name" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } } } } } } }
可以看到tb_test的字段name为text类型,我想将其修改成keyword类型
2.创建新的index和mapping
创建一个新的index curl -u elastic:elastic -H 'Content-Type: application/json' -XPUT "http://192.168.1.85:9200/copy01_db_customer" 创建一个mapping curl -u elastic:elastic -H 'Content-Type: application/json' -XPOST "http://192.168.1.85:9200/copy01_db_customer/tb_test/_mapping?pretty" -d ' { "tb_test": { "properties": { "name": { "type": "keyword", "store": "true" } } } } '
这里创建了一个新的index叫做opy01_db_customer,相应的tb_test mapping 字段name 为keyword类型
3.数据同步
curl -u elastic:elastic -X POST "192.168.1.85:9200/_reindex" -H 'Content-Type: application/json' -d' { "source": { "index": "db_customer" }, "dest": { "index": "copy01_db_customer" } }'
4.再次查看新index结构
[esuser@localhost ~]$ curl -u elastic:elastic -H "Content-Type: application/json" -XGET "http://192.168.1.85:9200/copy01_db_customer/_mappings?pretty=true" { "copy01_db_customer" : { "mappings" : { "tb_test" : { "properties" : { "name" : { "type" : "keyword", "store" : true } } } } } }
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