1、document的全量替换
(1)语法与创建文档是一样的,如果document id不存在,那么就是创建;如果document id已经存在,那么就是全量替换操作,替换document的json串内容
(2)document是不可变的,如果要修改document的内容,第一种方式就是全量替换,直接对document重新建立索引,替换里面所有的内容
(3)es会将老的document标记为deleted,然后新增我们给定的一个document,当我们创建越来越多的document的时候,es会在适当的时机在后台自动删除标记为deleted的document
创建:
PUT /shop/_doc/2
{
"name" : "huawei Mate30",
"price" : "7890",
"system" : "hongmeng 1.0",
"CPU" : "qinglin 990"
}
{
"_index" : "shop",
"_type" : "_doc",
"_id" : "2",
"_version" : 1,
"result" : "created",
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"_seq_no" : 1,
"_primary_term" : 1
}
全量替换:
PUT /shop/_doc/2
{
"name" : "huawei Mate30",
"price" : "9890",
"system" : "hongmeng 3.0",
"CPU" : "qinglin 990"
}
{
"_index" : "shop",
"_type" : "_doc",
"_id" : "2",
"_version" : 2, # 版本号改变了
"result" : "updated", # result update
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"_seq_no" : 2,
"_primary_term" : 1
}
最开始创建的 document 不会被物理删除, 只是做了 delete 标识,只有当 ES 中的数据量很多的时候 ES 才会真正的物理删除
2、document的强制创建
(1)创建文档与全量替换的语法是一样的,有时我们只是想新建文档,不想替换文档,如果强制进行创建呢?
(2)PUT /index/_doc/id?op_type=create,PUT /index/_doc/id/_create
强制创建:
PUT /shop/_doc/2/_create
{
"name" : "huawei Mate30",
"price" : "9890",
"system" : "hongmeng 4.0",
"CPU" : "qinglin 990"
}
{
"error": {
"root_cause": [
{
"type": "version_conflict_engine_exception",
"reason": "[2]: version conflict, document already exists (current version [2])",
"index_uuid": "vh1E-Q14Tb2htCPsd9B32g",
"shard": "0",
"index": "shop"
}
],
"type": "version_conflict_engine_exception",
"reason": "[2]: version conflict, document already exists (current version [2])",
"index_uuid": "vh1E-Q14Tb2htCPsd9B32g",
"shard": "0",
"index": "shop"
},
"status": 409
}
3、document的删除
(1)DELETE /index/_doc/id
(2)不会直接物理删除,只会将其标记为deleted,当数据越来越多的时候,在后台自动删除