es基本用法(三)——文档相关_es每条doc是什么意思-优快云博客

本文链接：https://blog.youkuaiyun.com/MengDiL_yl/article/details/103983776

本文档介绍了Elasticsearch中关于文档的增删改查操作。从创建文档开始，展示了如何查询、更新和删除单个文档，以及如何批量删除一系列文档。通过对version版本的提及，强调了版本控制在更新过程中的作用。

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es的文档相当于mysql中的一张表，索引相当于一个数据库，在es基本用法(二)——索引相关中我们了解了创建索引相关，接下来了解一下文档的增删改查。

创建文档

PUT luoyunlong/user/1
{
  "username":"lyl(测试es)",
  "level":"INFO"
}

结果

{
  "_index": "luoyunlong",
  "_type": "user",
  "_id": "1",
  "_version": 1,
  "result": "created",
  "_shards": {
    "total": 3,
    "successful": 2,
    "failed": 0
  },
  "_seq_no": 0,
  "_primary_term": 1
}

查询刚刚创建的文档

GET luoyunlong/user/1

结果(括号里面通俗地理解)

{
  //索引(数据库)
  "_index": "luoyunlong",
  //类型(表)
  "_type": "user",
  //id
  "_id": "1",
  "_version": 1,
  "found": true,
  //文档源(具体数据)
  "_source": {
    "username": "lyl(测试es)",
    "level": "INFO"
  }
}

修改文档

POST luoyunlong/user/1
{
  "username": "lyl(测试es)(修改)",
  "level": "INFO"
}

结果(version版本已变更)

{
  "_index": "luoyunlong",
  "_type": "user",
  "_id": "1",
  "_version": 2,
  "result": "updated",
  "_shards": {
    "total": 3,
    "successful": 2,
    "failed": 0
  },
  "_seq_no": 1,
  "_primary_term": 1
}

查询

GET luoyunlong/user/1

{
  "_index": "luoyunlong",
  "_type": "user",
  "_id": "1",
  "_version": 2,
  "found": true,
  "_source": {
    "username": "lyl(测试es)(修改)",
    "level": "INFO"
  }
}

删除文档

DELETE luoyunlong/user/1

结果

{
  "_index": "luoyunlong",
  "_type": "user",
  "_id": "1",
  "_version": 3,
  "result": "deleted",
  "_shards": {
    "total": 3,
    "successful": 2,
    "failed": 0
  },
  "_seq_no": 2,
  "_primary_term": 1
}

批量删除(删除id从2到29的文档)

POST argus/_delete_by_query
{
  "query": {
    "range": {
      "id": {
        "gte": 2,
        "lte": 29
      }
    }
  }
}

结果

{
  "took": 57,
  "timed_out": false,
  "total": 28,
  "deleted": 28,
  "batches": 1,
  "version_conflicts": 0,
  "noops": 0,
  "retries": {
    "bulk": 0,
    "search": 0
  },
  "throttled_millis": 0,
  "requests_per_second": -1,
  "throttled_until_millis": 0,
  "failures": []
}

查询

GET argus/_search

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 1,
    "hits": [
      {
        "_index": "argus",
        "_type": "event",
        "_id": "1",
        "_score": 1,
        "_source": {
          "id": 1,
          "type": 0,
          "level": 4,
          "projectName": 1,
          "instanceId": "1",
          "projectType": 1,
          "instanceName": "测试project",
          "eventTime": 1578968455089,
          "message": "测试message",
          "gmtCreate": 1578968455089,
          "gmtModified": 1578968455089
        }
      }
    ]
  }
}