Query Device List Flexibly
Function
API description
This API is used by an application to query a desired device list using SQL statements.
Constraints
-
This API is supported only by Standard and Enterprise editions.
-
The maximum TPS for an account to call this API is 1 (one request per second).
SQL-like syntax description
SQL-like statements include select, from, where (optional), order by (optional), and limit clauses (optional). The maximum length is 400 characters. The content in the clause is case sensitive, but keywords in SQL statements are case insensitive.
Example:
select * from device where device_id = 'as********' limit 0,5
SELECT clause
select [field]/[count(*)/count(1)] from device
field indicates the parameter to be obtained. Replace it with the response parameter name. You can also enter an asterisk (*) to obtain all parameters.
To obtain the number of queried devices, use count(*) or count(1).
FROM clause
from device
The parameter following from indicates the name of the resource to be queried. Currently, device is supported.
WHERE clause (optional)
WHERE [condition1] AND [condition2]
Up to five conditions are supported. Conditions cannot be nested. For details about the parameters that support query, see Description of query condition parameters and Supported operators.
AND and OR are supported. For details about the priority, see the standard SQL syntax. By default, the priority of AND is higher than that of OR.
LIMIT clause (optional)
limit [offset,] rows
offset indicates the query offset. rows indicates the maximum number of rows in the query result. Examples:
-
limit n ; Example: (select * from device limit 10)
Up to n records can be returned.
-
limit m,n; Example: (select * from device limit 20,10) The query offset is m. Up to n records can be returned.
Constraints
The maximum value of offset is 500, and the maximum value of rows is 50. If the limit clause is not specified, limit 10 is used by default.
ORDER BY clause (optional)
This clause is used for customizing sorting. Currently, the marker parameter supports custom sorting.
order by marker [asc]/[desc]
If the clause is not specified, random sorting is used by default.
Description of query condition parameters
Parameter | Type | Description | Value Range |
---|---|---|---|
app_id | string | Resource space ID. | The value can contain a maximum of 36 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed. |
device_id | string | Device ID. | The value can contain a maximum of 128 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed. |
gateway_id | string | Gateway ID. | The value can contain a maximum of 128 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed. |
product_id | string | ID of the product associated with the device. | The value can contain a maximum of 36 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed. |
device_name | string | Device name. | The value can contain a maximum of 256 characters. Only letters, digits, and special characters (_?'#(),&%@!-) are allowed. |
node_id | string | Node ID. | The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed. |
status | string | Device status. | ONLINE, OFFLINE, ABNORMAL, INACTIVE, and FROZEN |
node_type | string | Device node type. | GATEWAY (directly connected device or gateway) and ENDPOINT (indirectly connected device) |
tag_key | string | Tag key. | The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed. |
tag_value | string | Tag value. | The value can contain a maximum of 128 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed. |
sw_version | string | Software version. | The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed. |
fw_version | string | Firmware version. | The value can contain a maximum of 64 characters. Only letters, digits, underscores (_), periods (.), and hyphens (-) are allowed. |
group_id | string | Group ID. | The value can contain a maximum of 36 characters. Only hexadecimal characters and hyphens (-) are allowed. |
create_time | string | Device registration time. | Format: yyyy-MM-dd'T'HH:mm:ss.SSS'Z'. Example: 2015-06-06T12:10:10.000Z |
marker | string | Result record ID. | The value is a string of 24 hexadecimal characters. Example: ffffffffffffffffffffffff |
Supported operators
Operator | Parameter that Support the Operator |
---|---|
= | All |
!= | All |
> | create_time and marker |
< | create_time and marker |
like | device_name, node_id, tag_key, and tag_value |
in | Fields except tag_key and tag_value |
not in | Fields except tag_key and tag_value |
SQL restrictions
-
like: Only prefix match is supported. Suffix match or wildcard match is not supported. At least four characters must be contained for prefix match. Special characters cannot be contained. Only letters, digits, underscores (_), and hyphens (-) are allowed. The prefix must end with %.
-
Only count(*) or count(1) is supported.
-
Other SQL statements, such as nested SQL statements, union, join, and alias, are not supported.
-
The SQL statement can contain up to 400 characters. Up to five request conditions are supported.
-
The condition value cannot be null or an empty string.
Debugging
You can debug this API through automatic authentication in API Explorer or use the SDK sample code generated by API Explorer.
URI
POST /v5/iot/{project_id}/search/query-devices
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Parameter description: project ID. For details about how to obtain the project ID, see Obtaining a Project ID. |
Request Parameters
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
X-Auth-Token |
No |
String |
Parameter description: user token. You can obtain the token by calling the IAM API Obtaining a User Token Through Password Authentication. X-Subject-Token in the response header returned by the API is the desired user token. For details about how to obtain the token, see Token Authentication. |
Instance-Id |
No |
String |
Parameter description: instance ID. Unique identifier of each instance in the physical multi-tenant scenario. Mandatory for professional editions and recommended in other cases. Log in to the IoTDA console and choose Overview in the navigation pane to view the instance ID. For details, see Viewing Instance Details. |
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
sql |
Yes |
String |
SQL statement. For details, see the SQL-like syntax description. Minimum: 1 Maximum: 400 |
Response Parameters
Status code: 200
Parameter |
Type |
Description |
---|---|---|
devices |
Array of SearchDevice objects |
Device query result list. |
count |
Long |
Total number of records that meet query conditions. This parameter is returned only when select count(*)/count(1) is used. |
Parameter |
Type |
Description |
---|---|---|
app_id |
String |
Resource space ID. Maximum: 36 |
app_name |
String |
Resource space name. |
device_id |
String |
Device ID, used to uniquely identify a device. The value of this parameter is specified during device registration or allocated by the platform. If the value is allocated by the platform, the value is in the format of [product_id]_[node_id]. Maximum: 256 |
node_id |
String |
Device identifier. This parameter is set to the IMEI, MAC address, or serial number. Maximum: 64 |
gateway_id |
String |
Gateway ID, which is the device ID of the parent device. The gateway ID is the same as the device ID if the device is a directly connected device. If the device is an indirectly connected device, the gateway ID is the device ID of the directly connected device with which it associates. Maximum: 256 |
device_name |
String |
Device name. Maximum: 256 |
node_type |
String |
Device node type.
|
fw_version |
String |
Firmware version of the device. Maximum: 256 |
sw_version |
String |
Software version of the device. Maximum: 256 |
device_sdk_version |
String |
Device SDK information. Maximum: 256 |
product_id |
String |
Unique ID of the product associated with the device. |
product_name |
String |
Name of the product associated with the device. |
groups |
Object |
Device group list. |
status |
String |
Device status.
|
tags |
Object |
List of device tags. |
marker |
String |
Query result record ID. |
Example Requests
Runs the SQL statement to query all devices.
POST https://{endpoint}/v5/iot/{project_id}/search/query-devices { "sql" : "select * from device" }
Example Responses
Status code: 200
OK
{ "devices" : [ { "app_id" : "jeQDJQZltU8iKgFFoW060F5SGZka", "marker" : "5c8f3d2d3df1f10d803adbda", "device_id" : "d4922d8a-6c8e-4396-852c-164aefa6638f", "node_id" : "ABC123456789", "gateway_id" : "d4922d8a-6c8e-4396-852c-164aefa6638f", "device_name" : "dianadevice", "node_type" : "ENDPOINT", "fw_version" : "1.1.0", "sw_version" : "1.1.0", "device_sdk_version" : "1.1.0", "product_id" : "b640f4c203b7910fc3cbd446ed437cbd", "status" : "INACTIVE", "tags" : [ { "tag_key" : "testTagName", "tag_value" : "testTagValue" } ] } ] }
Status Codes
Status Code |
Description |
---|---|
200 |
OK |
400 |
Bad Request |
401 |
Unauthorized |
403 |
Forbidden |
500 |
Internal Server Error |
Error Codes
See Error Codes.
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