Actualizar tabla

Puede utilizar los siguientes fragmentos de código para actualizar una tabla.

nota

Estos fragmentos de código se basan en aplicaciones de ejemplo completas en GitHub. Para obtener más información sobre cómo empezar con las aplicaciones de ejemplo, consulte Aplicación de muestra.

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

El siguiente fragmento utiliza SDK de AWS para JavaScript v3. Para obtener más información sobre cómo instalar el cliente y su uso, consulte Cliente de escritura de Timestream: SDK de AWS para JavaScript v3.

También puede consultar Class UpdateTableCommand y 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);
}

El siguiente fragmento utiliza SDK de AWS para el estilo de JavaScript v2. Se basa en la aplicación de ejemplo Node.js, la aplicación de ejemplo Amazon Timestream para LiveAnalytics en 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());
            }

        }