es 批量查询，修改，删除，增加操作

1、ES批量查询

• 批量查询采用的是_mget的语法操作。例子：

GET /_mget
{
  "docs":[{
  "_index":"test_index",
  "_type":"test_type",
  "_id":"12"},
  {
  "_index":"test_index",
  "_type":"test_type",
  "_id":"13"}
  ]
}
结果：
{
  "docs": [
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "12",
      "_version": 4,
      "found": true,
      "_source": {
        "test_filed1": "xxx my test",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    },
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "13",
      "_version": 1,
      "found": true,
      "_source": {
        "test_filed1": "my test1",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    }
  ]
}

• 当然，如果是index都相同的情况，那么可以采用如下方式：

GET /test_index/_mget
{
  "docs":[
        {
            "_type":"test_type",
            "_id":"12"
        },
        {
            "_type":"test_type",
            "_id":"13"
        }
    ]
}
结果：
{
  "docs": [
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "12",
      "_version": 4,
      "found": true,
      "_source": {
        "test_filed1": "xxx my test",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    },
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "13",
      "_version": 1,
      "found": true,
      "_source": {
        "test_filed1": "my test1",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    }
  ]
}

• 同样，当index和type都一致的情况下，可以这样查询，如下：

GET /test_index/test_type/_mget
{
  "docs":[
        {
            "_id":"12"
        },
        {
            "_id":"13"
        }
    ]
}   or
GET /test_index/test_type/_mget
{
  "ids":[12,13]
}
结果：
{
  "docs": [
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "12",
      "_version": 4,
      "found": true,
      "_source": {
        "test_filed1": "xxx my test",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    },
    {
      "_index": "test_index",
      "_type": "test_type",
      "_id": "13",
      "_version": 1,
      "found": true,
      "_source": {
        "test_filed1": "my test1",
        "test_filed2": "my test2",
        "test_filed3": "my test3"
      }
    }
  ]
}

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2、ES批量修改

• 使用bulk的api来进行批量的修改操作，里面涉及的操作和批量查询有点区别，但是原理都是一样的。可以使用update或者index

POST /test_index/test_type/_bulk
{"update":{"_id":12}}
{"doc":{"test_filed1":"test update bulk12"}}
{"update":{"_id":13}}
{"doc":{"test_filed1":"test update bulk13"}}

---

3、ES批量删除

• 同样是使用bulk的api来进行批量删除，但是删除有一个特性，就是只需要一行就够了。

POST /_bulk
{"delete":{"_index":"test_index","_type":"test_type","_id":10}}
{"delete":{"_index":"test_index","_type":"test_type","_id":11}}

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4、ES批量增加

• 增加有2种方式，一种是create,一种是index,create方式类似于我们的put操作

POST /_bulk
{"create":{"_index":"test_index","_type":"test_type","_id":3}}
{"test_filed1":"test bulk create test3"}
{"create":{"_index":"test_index","_type":"test_type","_id":2}}
{"test_filed1":"test bulk create test2"}

---