更新表 - Amazon Timestream

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更新表

您可以使用以下代码片段来更新表。

注意

这些代码片段基于上的完整示例应用程序。GitHub有关如何开始使用示例应用程序的更多信息，请参阅示例应用程序。

Java 
    public void updateTable() {
        System.out.println("Updating table");
        UpdateTableRequest updateTableRequest = new UpdateTableRequest();
        updateTableRequest.setDatabaseName(DATABASE_NAME);
        updateTableRequest.setTableName(TABLE_NAME);

        final RetentionProperties retentionProperties = new RetentionProperties()
                .withMemoryStoreRetentionPeriodInHours(HT_TTL_HOURS)
                .withMagneticStoreRetentionPeriodInDays(CT_TTL_DAYS);

        updateTableRequest.setRetentionProperties(retentionProperties);

        amazonTimestreamWrite.updateTable(updateTableRequest);
        System.out.println("Table updated");
    }
Java v2 
    public void updateTable() {
        System.out.println("Updating table");

        final RetentionProperties retentionProperties = RetentionProperties.builder()
                .memoryStoreRetentionPeriodInHours(HT_TTL_HOURS)
                .magneticStoreRetentionPeriodInDays(CT_TTL_DAYS).build();
        final UpdateTableRequest updateTableRequest = UpdateTableRequest.builder()
                .databaseName(DATABASE_NAME).tableName(TABLE_NAME).retentionProperties(retentionProperties).build();

        timestreamWriteClient.updateTable(updateTableRequest);
        System.out.println("Table updated");
    }
Go 
// Update table.
    magneticStoreRetentionPeriodInDays := int64(7 * 365)
    memoryStoreRetentionPeriodInHours := int64(24)

    updateTableInput := &timestreamwrite.UpdateTableInput{
        DatabaseName: aws.String(*databaseName),
        TableName:    aws.String(*tableName),
        RetentionProperties: &timestreamwrite.RetentionProperties{
            MagneticStoreRetentionPeriodInDays: &magneticStoreRetentionPeriodInDays,
            MemoryStoreRetentionPeriodInHours:  &memoryStoreRetentionPeriodInHours,
        },
    }
    updateTableOutput, err := writeSvc.UpdateTable(updateTableInput)

    if err != nil {
        fmt.Println("Error:")
        fmt.Println(err)
    } else {
        fmt.Println("Update table is successful, below is the output:")
        fmt.Println(updateTableOutput)
    }
Python 
    def update_table(self):
        print("Updating table")
        retention_properties = {
            'MemoryStoreRetentionPeriodInHours': Constant.HT_TTL_HOURS,
            'MagneticStoreRetentionPeriodInDays': Constant.CT_TTL_DAYS
        }
        try:
            self.client.update_table(DatabaseName=Constant.DATABASE_NAME, TableName=Constant.TABLE_NAME,
                                     RetentionProperties=retention_properties)
            print("Table updated.")
        except Exception as err:
            print("Update table failed:", err)
Node.js

以下代码段用 AWS SDK于 JavaScript v3。有关如何安装客户端和用法的更多信息，请参阅 Timestream Write Client-f AWS SDK or JavaScript v3。

另请参阅类 UpdateTableCommand和UpdateTable。

import { TimestreamWriteClient, UpdateTableCommand } from "@aws-sdk/client-timestream-write";
const writeClient = new TimestreamWriteClient({ region: "us-east-1" });

const params = {
    DatabaseName: "testDbFromNode",
    TableName: "testTableFromNode",
    RetentionProperties: {
        MemoryStoreRetentionPeriodInHours: 24,
        MagneticStoreRetentionPeriodInDays: 180
    }
};

const command = new UpdateTableCommand(params);

try {
    const data = await writeClient.send(command);
    console.log("Table updated")
} catch (error) {
    console.log("Error updating table. ", error);
}

以下代码段使用了 for AWS SDK JavaScript V2 样式。它基于 Node.js 示例 Amazon Timestream 中的示例 LiveAnalytics 应用程序，供其上使用。 GitHub

async function updateTable() {
    console.log("Updating Table");
    const params = {
        DatabaseName: constants.DATABASE_NAME,
        TableName: constants.TABLE_NAME,
        RetentionProperties: {
            MemoryStoreRetentionPeriodInHours: constants.HT_TTL_HOURS,
            MagneticStoreRetentionPeriodInDays: constants.CT_TTL_DAYS
        }
    };

    const promise = writeClient.updateTable(params).promise();

    await promise.then(
        (data) => {
            console.log("Table updated")
        },
        (err) => {
            console.log("Error updating table. ", err);
            throw err;
        }
    );
}
.NET 
        public async Task UpdateTable()
        {
            Console.WriteLine("Updating Table");

            try
            {
                var updateTableRequest = new UpdateTableRequest
                {
                    DatabaseName = Constants.DATABASE_NAME,
                    TableName = Constants.TABLE_NAME,
                    RetentionProperties = new RetentionProperties
                    {
                        MagneticStoreRetentionPeriodInDays = Constants.CT_TTL_DAYS,
                        MemoryStoreRetentionPeriodInHours = Constants.HT_TTL_HOURS
                    }
                };
                UpdateTableResponse response = await writeClient.UpdateTableAsync(updateTableRequest);
                Console.WriteLine($"Table {Constants.TABLE_NAME} updated");
            }
            catch (ResourceNotFoundException)
            {
                Console.WriteLine("Table does not exist.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Update table failed:" + e.ToString());
            }

        }