Delete time series metadata by using Tablestore SDK for Go

You can call the DeleteTimeseriesMeta operation to delete the metadata of multiple time series in a batch.

Prerequisites

A TimeseriesClient is initialized. Initialize a Tablestore client.

Request parameters

Specify the time series identifiers of the time series to delete. You can specify multiple identifiers for batch deletion.

Parameter	Type	Required	Description
timeseriesKey	TimeseriesKey	Yes	The time series identifier. A `timeseriesKey` contains the following components:

TimeseriesKey components

Component	Type	Required	Description
measurementName	string	Yes	The measurement name of the time series.
dataSource	string	No	The data source of the time series. You can leave this parameter empty.
tags	map[string]string	No	The tags of the time series, specified as string key-value pairs.

Sample code

The following example deletes the metadata of 10 time series. Each time series is identified by a measurement name, data source, and tags.

func DeleteTimeseriesMetaSample(tsClient *tablestore.TimeseriesClient, timeseriesTableName string) {
    fmt.Println("[Info]: Begin to delete timeseries meta: ", timeseriesTableName)
    // Construct a request to delete time series metadata.
    deleteTimeseriesMetaRequest := tablestore.NewDeleteTimeseriesMetaRequest(timeseriesTableName)
    for i := 0; i < 10; i++ {
        timeseriesKey := tablestore.NewTimeseriesKey()
        timeseriesKey.SetMeasurementName("cpu")
        timeseriesKey.SetDataSource("host_" + strconv.Itoa(i))
        timeseriesKey.AddTag("region", "hangzhou")
        timeseriesKey.AddTag("os", "Ubuntu16.04")
        deleteTimeseriesMetaRequest.AddTimeseriesKeys(timeseriesKey)
    }
    deleteTimeseriesMetaResponse, err := tsClient.DeleteTimeseriesMeta(deleteTimeseriesMetaRequest)
    if err != nil {
        fmt.Println("[Error]: Failed to delete timeseries meta with error: ", err)
        return
    }
    fmt.Println("[Info]: DeleteTimeseriesMeta finished! RequestId: ", deleteTimeseriesMetaResponse.RequestId)
}

Key steps in the sample code:

Step	Description
Create a request	Call `tablestore.NewDeleteTimeseriesMetaRequest(timeseriesTableName)` to create a delete request for the specified time series table.
Specify time series identifiers	Create `TimeseriesKey` objects by calling `tablestore.NewTimeseriesKey()`, and then set the measurement name, data source, and tags for each time series.
Add identifiers to the request	Call `deleteTimeseriesMetaRequest.AddTimeseriesKeys(timeseriesKey)` to add each time series identifier to the request.
Send the request	Call `tsClient.DeleteTimeseriesMeta(deleteTimeseriesMetaRequest)` to send the request. The response contains the `RequestId`.

References

Initialize a Tablestore client

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