es修改数据类型

时间:2023-03-09 19:11:48
es修改数据类型

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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