QueryDevicesHotStorageData - IoT Platform - Alibaba Cloud Documentation Center

Queries time series data.

Usage notes

The QueryDevicesHotStorageData operation is available only for Standard and Exclusive Enterprise Edition instances.

Limits

The volume of data that you can read per second from the time series data storage of an Enterprise Edition instance by calling this operation varies based on the value that you specified for the Time-series Data Storage IOPS parameter when you purchased the instance. For more information, see Purchase Enterprise Edition instances.
You can call the QueryDevicesHotStorageData operation to query the data that has not expired.
Note
The retention period of the data of a field starts from the day of the timestamp of the field value.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter	Type	Required	Example	Description
Action	String	Yes	QueryDevicesHotStorageData	The operation that you want to perform. Set the value to QueryDevicesHotStorageData.
Asc	Integer	Yes	0	The order in which you want to sort the returned data records. Valid values: 0: reverse chronological order. 1: chronological order.
EndTime	Long	Yes	1579249499000	The end of the time range to query. The end time must be later than the start time. Specify a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC. Example: 1579249499000.
Identifier	String	Yes	temperature	The identifier of the field that is stored in time series data storage. The identifier is specified by Items when you call the WriteDevicesHotStorageData operation to write data to time series data storage.
IotInstanceId	String	Yes	iot-2w****	The instance ID. You can view the instance ID on the Overview page in the IoT Platform console.
PageSize	Integer	Yes	10	The number of entries per page. Valid values: 1 to 100. The number of data records returned for a field cannot exceed this value.
StartTime	Long	Yes	1579249499000	The beginning of the time range to query. The start time must be earlier than the end time. Specify a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC. Example: 1579249499000.
UserTopic	String	Yes	user/a*/b*	The name of the custom topic to which the data that you want to query belongs. Specify other levels that are required by the custom topic after the `user` level. For more information, see Use custom topics.
ProductKey	String	No	a1BwAGV****	The ProductKey of the product to which the device belongs. Important If you specify this parameter, you must also specify DeviceName.
DeviceName	String	No	device1	The DeviceName of the device. Important If you specify this parameter, you must also specify ProductKey.
NextPageToken	String	No	Bo***x44Qx	The pagination token that is used in the next request to retrieve a new page of results. You do not need to specify this parameter for the first request. You must specify the token that is obtained from the previous query as the value of NextPageToken.
IotId	String	No	y4u2weAI********HMle1234	The device ID. Important IotId specifies a GUID for the device. The value of IotId is equivalent to the combination of the values of ProductKey and DeviceName. If you specify this parameter, you do not need to specify ProductKey or DeviceName. If you specify IotId, ProductKey, and DeviceName, the value of IotId takes precedence.

In addition to the preceding operation-specific request parameters, you must specify common request parameters when you call this operation. For more information, see Common parameters.

Response parameters

Parameter	Type	Example	Description
Code	String	iot.system.SystemException	The error code returned if the request failed. For more information, see the Error codes section of this topic.
Data	Struct		The data returned if the request was successful.
List	Array of PropertyInfo		The queried time series data.
PropertyInfo
Time	String	1516541885630	The timestamp of the field value. This value is a UNIX timestamp representing the number of milliseconds that have elapsed since January 1, 1970, 00:00:00 UTC.
Value	String	2	The field value.
NextValid	Boolean	true	Indicates whether the next page exists. Valid values: true false If true is returned for NextValid, you can specify the value of NextPageToken returned in the response as the value of NextPageToken in the next request. This way, you can query the data that is not included in the current query.
nextPageToken	String	Bo***x44Qx	A pagination token. It can be used in the next request to retrieve a new page of results.
ErrorMessage	String	A system exception occurred.	The error message returned if the request failed.
RequestId	String	E55E50B7-40EE-4B6B-8BBE-D3ED55CCF565	The request ID.
Success	Boolean	true	Indicates whether the request was successful. Valid values: true false

Examples

Sample requests

http(s)://iot.cn-shanghai.aliyuncs.com/?Action=QueryDevicesHotStorageData
&Asc=0
&EndTime=1579249499000
&Identifier=temperature
&IotInstanceId=iot-2w****
&PageSize=10
&StartTime=1579249499000
&UserTopic=user/a***/b***
$ProductKey=a1BwAGV****
$DeviceName=device1
&<Common request parameters>

Sample success responses

XML format

<QueryDevicesHotStorageDataResponse>
  <RequestId>E55E50B7-40EE-4B6B-8BBE-D3ED55CCF565</RequestId>
  <Data>
        <NextValid>true</NextValid>
        <nextPageToken>Bo***x44Qx</nextPageToken>
        <List>
              <PropertyInfo>
                    <Value>2</Value>
                    <Time>1516541885630</Time>
              </PropertyInfo>
        </List>
  </Data>
  <Success>true</Success>
</QueryDevicesHotStorageDataResponse>

JSON format

{
    "RequestId": "E55E50B7-40EE-4B6B-8BBE-D3ED55CCF565",
    "Data": {
        "NextValid": true,
        "nextPageToken": "Bo***x44Qx",
        "List": {
            "PropertyInfo": [{
                "Value": 2,
                "Time": 1516541885630
            }]
        }
    },
    "Success": true
}

Error codes

HTTP status code	Error code	Error message	Description
400	iot.device.InvalidTimeBucket	The specified time range is invalid.	The specified time range is invalid.
400	iot.device.NullDeviceName	The DeviceName parameter cannot be empty.	DeviceName is not specified.
400	iot.prod.NullProductKey	The ProductKey parameter cannot be empty.	ProductKey is not specified.
400	iot.common.InvalidPageParams	The specified pagination size or pagination parameter is invalid.	The specified page size or page number is invalid.
400	iot.prod.NotExistedProduct	The specified product does not exist.	The product that you specify does not exist.
400	iot.device.PageTokenIsIllegal	The paging token is invalid.	The value of NextPageToken is invalid.
400	Iot.Device.NotExistedDevice	The device does not exist.	The device does not exist or is not activated.
400	iot.device.InvalidFormattedDeviceName	The DeviceName format is invalid.	The format of DeviceName is invalid.
400	iot.prod.InvalidFormattedProductkey	The ProductKey format is invalid.	The format of ProductKey is invalid.
400	iot.system.IllegalRequest	The request parameter is invalid.	One or more request parameters are invalid.
400	iot.device.InvalidIoTId	The specified device ID is invalid.	The device ID is invalid.
400	iot.storage.HotStorageIopsReadNotEnough	The timeline storage read IOPS is not enough.	The read IOPS of time series data storage is insufficient.

For a list of error codes, see Service error codes.