IoTDB Website

2023年7月10日大约 8 分钟

RESTful 服务

IoTDB 的 RESTful 服务可用于查询、写入和管理操作，它使用 OpenAPI 标准来定义接口并生成框架。

开启RESTful 服务

RESTful 服务默认情况是关闭的

找到IoTDB安装目录下面的conf/iotdb.properties文件，将 enable_rest_service 设置为 true 以启用该模块。

 enable_rest_service=true
 ```

### 鉴权
除了检活接口 `/ping`，RESTful 服务使用了基础（basic）鉴权，每次 URL 请求都需要在 header 中携带 `'Authorization': 'Basic ' + base64.encode(username + ':' + password)`。

示例中使用的用户名为：`root`，密码为：`root`，对应的 Basic 鉴权 Header 格式为

Authorization: Basic cm9vdDpyb290


- 若用户名密码认证失败，则返回如下信息：

    HTTP 状态码：`401`

    返回结构体如下
    ```json
    {
      "code": 600,
      "message": "WRONG_LOGIN_PASSWORD_ERROR"
    }
    ```

- 若未设置 `Authorization`，则返回如下信息：

  HTTP 状态码：`401`

  返回结构体如下
    ```json
    {
      "code": 603,
      "message": "UNINITIALIZED_AUTH_ERROR"
    }
    ```

### 接口

#### ping

ping 接口可以用于线上服务检活。

请求方式：`GET`

请求路径：http://ip:port/ping

请求示例：

```shell
$ curl http://127.0.0.1:18080/ping

返回的 HTTP 状态码：

200：当前服务工作正常，可以接收外部请求。
503：当前服务出现异常，不能接收外部请求。

响应参数：

参数名称	参数类型	参数描述
code	integer	状态码
message	string	信息提示

响应示例：

HTTP 状态码为 200 时：

{
  "code": 200,
  "message": "SUCCESS_STATUS"
}

HTTP 状态码为 503 时：

{
  "code": 500,
  "message": "thrift service is unavailable"
}

/ping 接口访问不需要鉴权。

query

query 接口可以用于处理数据查询和元数据查询。

请求方式：POST

请求头：application/json

请求路径：http://ip:port/rest/v1/query

参数说明:

参数名称	参数类型	是否必填	参数描述
sql	string	是
rowLimit	integer	否	一次查询能返回的结果集的最大行数。如果不设置该参数，将使用配置文件的 `rest_query_default_row_size_limit` 作为默认值。当返回结果集的行数超出限制时，将返回状态码 `411`。

响应参数:

参数名称	参数类型	参数描述
expressions	array	用于数据查询时结果集列名的数组，用于元数据查询时为`null`
columnNames	array	用于元数据查询结果集列名数组，用于数据查询时为`null`
timestamps	array	时间戳列，用于元数据查询时为`null`
values	array	二维数组，第一维与结果集列名数组的长度相同，第二维数组代表结果集的一列

请求示例如下所示：

提示:为了避免OOM问题，不推荐使用select * from root.xx.** 这种查找方式。

请求示例表达式查询:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select s3, s4, s3 + 1 from root.sg27 limit 2"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": [
    "root.sg27.s3",
    "root.sg27.s4",
    "root.sg27.s3 + 1"
  ],
  "columnNames": null,
  "timestamps": [
    1635232143960,
    1635232153960
  ],
  "values": [
    [
      11,
      null
    ],
    [
      false,
      true
    ],
    [
      12.0,
      null
    ]
  ]
}

请求示例 show child paths:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show child paths root"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "child paths"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27",
      "root.sg28"
    ]
  ]
}

请求示例 show child nodes:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show child nodes root"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "child nodes"
  ],
  "timestamps": null,
  "values": [
    [
      "sg27",
      "sg28"
    ]
  ]
}

请求示例 show all ttl:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show all ttl"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "storage group",
    "ttl"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27",
      "root.sg28"
    ],
    [
      null,
      null
    ]
  ]
}

请求示例 show ttl:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show ttl on root.sg27"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "storage group",
    "ttl"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27"
    ],
    [
      null
    ]
  ]
}

请求示例 show functions:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show functions"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "function name",
    "function type",
    "class name (UDF)"
  ],
  "timestamps": null,
  "values": [
    [
      "ABS",
      "ACOS",
      "ASIN",
       ...
    ],
    [
      "built-in UDTF",
      "built-in UDTF",
      "built-in UDTF",
      ...
    ],
    [
      "org.apache.iotdb.db.query.udf.builtin.UDTFAbs",
      "org.apache.iotdb.db.query.udf.builtin.UDTFAcos",
      "org.apache.iotdb.db.query.udf.builtin.UDTFAsin",
      ...
    ]
  ]
}

请求示例 show timeseries:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show timeseries"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "timeseries",
    "alias",
    "storage group",
    "dataType",
    "encoding",
    "compression",
    "tags",
    "attributes"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27.s3",
      "root.sg27.s4",
      "root.sg28.s3",
      "root.sg28.s4"
    ],
    [
      null,
      null,
      null,
      null
    ],
    [
      "root.sg27",
      "root.sg27",
      "root.sg28",
      "root.sg28"
    ],
    [
      "INT32",
      "BOOLEAN",
      "INT32",
      "BOOLEAN"
    ],
    [
      "RLE",
      "RLE",
      "RLE",
      "RLE"
    ],
    [
      "SNAPPY",
      "SNAPPY",
      "SNAPPY",
      "SNAPPY"
    ],
    [
      null,
      null,
      null,
      null
    ],
    [
      null,
      null,
      null,
      null
    ]
  ]
}

请求示例 show latest timeseries:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show latest timeseries"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "timeseries",
    "alias",
    "storage group",
    "dataType",
    "encoding",
    "compression",
    "tags",
    "attributes"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg28.s4",
      "root.sg27.s4",
      "root.sg28.s3",
      "root.sg27.s3"
    ],
    [
      null,
      null,
      null,
      null
    ],
    [
      "root.sg28",
      "root.sg27",
      "root.sg28",
      "root.sg27"
    ],
    [
      "BOOLEAN",
      "BOOLEAN",
      "INT32",
      "INT32"
    ],
    [
      "RLE",
      "RLE",
      "RLE",
      "RLE"
    ],
    [
      "SNAPPY",
      "SNAPPY",
      "SNAPPY",
      "SNAPPY"
    ],
    [
      null,
      null,
      null,
      null
    ],
    [
      null,
      null,
      null,
      null
    ]
  ]
}

请求示例 count timeseries:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"count timeseries root.**"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "count"
  ],
  "timestamps": null,
  "values": [
    [
      4
    ]
  ]
}

请求示例 count nodes:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"count nodes root.** level=2"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "count"
  ],
  "timestamps": null,
  "values": [
    [
      4
    ]
  ]
}

请求示例 show devices:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show devices"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "devices",
    "isAligned"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27",
      "root.sg28"
    ],
    [
      "false",
      "false"
    ]
  ]
}

请求示例 show devices with storage group:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"show devices with storage group"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "devices",
    "storage group",
    "isAligned"
  ],
  "timestamps": null,
  "values": [
    [
      "root.sg27",
      "root.sg28"
    ],
    [
      "root.sg27",
      "root.sg28"
    ],
    [
      "false",
      "false"
    ]
  ]
}

请求示例 list user:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"list user"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "user"
  ],
  "timestamps": null,
  "values": [
    [
      "root"
    ]
  ]
}

请求示例原始聚合查询:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select count(*) from root.sg27"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": [
    "count(root.sg27.s3)",
    "count(root.sg27.s4)"
  ],
  "columnNames": null,
  "timestamps": [
    0
  ],
  "values": [
    [
      1
    ],
    [
      2
    ]
  ]
}

请求示例 group by level:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select count(*) from root.** group by level = 1"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "count(root.sg27.*)",
    "count(root.sg28.*)"
  ],
  "timestamps": null,
  "values": [
    [
      3
    ],
    [
      3
    ]
  ]
}

请求示例 group by:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select count(*) from root.sg27 group by([1635232143960,1635232153960),1s)"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": [
    "count(root.sg27.s3)",
    "count(root.sg27.s4)"
  ],
  "columnNames": null,
  "timestamps": [
    1635232143960,
    1635232144960,
    1635232145960,
    1635232146960,
    1635232147960,
    1635232148960,
    1635232149960,
    1635232150960,
    1635232151960,
    1635232152960
  ],
  "values": [
    [
      1,
      0,
      0,
      0,
      0,
      0,
      0,
      0,
      0,
      0
    ],
    [
      1,
      0,
      0,
      0,
      0,
      0,
      0,
      0,
      0,
      0
    ]
  ]
}

请求示例 last:

curl -H "Content-Type:application/json"  -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select last s3 from root.sg27"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "expressions": null,
  "columnNames": [
    "timeseries",
    "value",
    "dataType"
  ],
  "timestamps": [
    1635232143960
  ],
  "values": [
    [
      "root.sg27.s3"
    ],
    [
      "11"
    ],
    [
      "INT32"
    ]
  ]
}

请求示例 disable align:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select * from root.sg27 disable align"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "code": 407,
  "message": "disable align clauses are not supported."
}

请求示例 align by device:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select count(s3) from root.sg27 align by device"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "code": 407,
  "message": "align by device clauses are not supported."
}

请求示例 select into:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"select s3, s4 into root.sg29.s1, root.sg29.s2 from root.sg27"}' http://127.0.0.1:18080/rest/v1/query

响应示例:

{
  "code": 407,
  "message": "select into clauses are not supported."
}

nonQuery

请求方式：POST

请求头：application/json

请求路径：http://ip:port/rest/v1/nonQuery

参数说明:

参数名称	参数类型	是否必填	参数描述
sql	string	是

请求示例:

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"sql":"set storage group to root.ln"}' http://127.0.0.1:18080/rest/v1/nonQuery

响应参数:

参数名称	参数类型	参数描述
code	integer	状态码
message	string	信息提示

响应示例：

{
  "code": 200,
  "message": "SUCCESS_STATUS"
}

insertTablet

请求方式：POST

请求头：application/json

请求路径：http://ip:port/rest/v1/insertTablet

参数说明:

参数名称	参数类型	是否必填	参数描述
timestamps	array	是	时间列
measurements	array	是	测点名称
dataTypes	array	是	数据类型
values	array	是	值列，每一列中的值可以为 `null`
isAligned	boolean	是	是否是对齐时间序列
deviceId	boolean	是	设备名称

请求示例：

curl -H "Content-Type:application/json" -H "Authorization:Basic cm9vdDpyb290" -X POST --data '{"timestamps":[1635232143960,1635232153960],"measurements":["s3","s4"],"dataTypes":["INT32","BOOLEAN"],"values":[[11,null],[false,true]],"isAligned":false,"deviceId":"root.sg27"}' http://127.0.0.1:18080/rest/v1/insertTablet

响应参数：

参数名称	参数类型	参数描述
code	integer	状态码
message	string	信息提示

响应示例：

{
  "code": 200,
  "message": "SUCCESS_STATUS"
}

配置

配置位于 iotdb-rest.properties 中。

将 enable_rest_service 设置为 true 以启用该模块，而将 false 设置为禁用该模块。默认情况下，该值为 false。

enable_rest_service=true

仅在 enable_rest_service=true 时生效。将 rest_service_port 设置为数字（1025~65535），以自定义REST服务套接字端口。默认情况下，值为 18080。

rest_service_port=18080

一次查询能返回的结果集最大行数。当返回结果集的行数超出参数限制时，您只会得到在行数范围内的结果集，且将得到状态码411。

rest_query_default_row_size_limit=10000

缓存客户登录信息的过期时间（用于加速用户鉴权的速度，单位为秒，默认是8个小时）

cache_expire=28800

缓存中存储的最大用户数量（默认是100）

cache_max_num=100

缓存初始容量（默认是10）

cache_init_num=10

REST Service 是否开启 SSL 配置，将 enable_https 设置为 true 以启用该模块，而将 false 设置为禁用该模块。默认情况下，该值为 false。

enable_https=false

keyStore 所在路径（非必填）

key_store_path=

keyStore 密码（非必填）

key_store_pwd=

trustStore 所在路径（非必填）

trust_store_path=

trustStore 密码（非必填）

trust_store_pwd=

SSL 超时时间，单位为秒

idle_timeout=5000