Per funzionalità simili a Amazon Timestream for, prendi in considerazione Amazon Timestream LiveAnalytics per InfluxDB. Offre un'acquisizione semplificata dei dati e tempi di risposta alle query di una sola cifra di millisecondi per analisi in tempo reale. [Scopri](https://docs.aws.amazon.com//timestream/latest/developerguide/timestream-for-influxdb.html) di più qui.

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# Descrizione del database
<a name="code-samples.describe-db"></a>

È possibile utilizzare i seguenti frammenti di codice per ottenere informazioni sugli attributi del database appena creato.

**Nota**  
Questi frammenti di codice si basano su applicazioni di esempio complete su. [GitHub](https://github.com/awslabs/amazon-timestream-tools/blob/master/sample_apps) Per ulteriori informazioni su come iniziare a utilizzare le applicazioni di esempio, consulta. [Applicazione di esempio](sample-apps.md)

------
#### [  Java  ]

```
    public void describeDatabase() {
        System.out.println("Describing database");
        final DescribeDatabaseRequest describeDatabaseRequest = new DescribeDatabaseRequest();
        describeDatabaseRequest.setDatabaseName(DATABASE_NAME);
        try {
            DescribeDatabaseResult result = amazonTimestreamWrite.describeDatabase(describeDatabaseRequest);
            final Database databaseRecord = result.getDatabase();
            final String databaseId = databaseRecord.getArn();
            System.out.println("Database " + DATABASE_NAME + " has id " + databaseId);
        } catch (final Exception e) {
            System.out.println("Database doesn't exist = " + e);
            throw e;
        }
    }
```

------
#### [  Java v2  ]

```
    public void describeDatabase() {
        System.out.println("Describing database");
        final DescribeDatabaseRequest describeDatabaseRequest = DescribeDatabaseRequest.builder()
                .databaseName(DATABASE_NAME).build();
        try {
            DescribeDatabaseResponse response = timestreamWriteClient.describeDatabase(describeDatabaseRequest);
            final Database databaseRecord = response.database();
            final String databaseId = databaseRecord.arn();
            System.out.println("Database " + DATABASE_NAME + " has id " + databaseId);
        } catch (final Exception e) {
            System.out.println("Database doesn't exist = " + e);
            throw e;
        }
    }
```

------
#### [  Go  ]

```
describeDatabaseOutput, err := writeSvc.DescribeDatabase(describeDatabaseInput)

    if err != nil {
        fmt.Println("Error:")
        fmt.Println(err)
    } else {
        fmt.Println("Describe database is successful, below is the output:")
        fmt.Println(describeDatabaseOutput)
    }
```

------
#### [  Python  ]

```
    def describe_database(self):
        print("Describing database")
        try:
            result = self.client.describe_database(DatabaseName=Constant.DATABASE_NAME)
            print("Database [%s] has id [%s]" % (Constant.DATABASE_NAME, result['Database']['Arn']))
        except self.client.exceptions.ResourceNotFoundException:
            print("Database doesn't exist")
        except Exception as err:
            print("Describe database failed:", err)
```

------
#### [  Node.js  ]

Il seguente frammento utilizza AWS SDK per la versione 3. JavaScript Per ulteriori informazioni su come installare il client e sull'utilizzo, consulta [Timestream Write](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-timestream-write/index.html) Client - SDK per v3. AWS JavaScript 

[Vedi anche Class and. DescribeDatabaseCommand [DescribeDatabase](https://docs.aws.amazon.com/timestream/latest/developerguide/API_DescribeDatabase.html)](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-timestream-write/classes/describedatabasecommand.html)

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

const params = {
    DatabaseName: "testDbFromNode"
};

const command = new DescribeDatabaseCommand(params);

try {
    const data = await writeClient.send(command);
    console.log(`Database ${data.Database.DatabaseName} has id ${data.Database.Arn}`);
} catch (error) {
    if (error.code === 'ResourceNotFoundException') {
        console.log("Database doesn't exist.");
    } else {
        console.log("Describe database failed.", error);
        throw error;
    }
}
```

Il seguente frammento utilizza l' AWS SDK per JavaScript lo stile V2. Si basa sull'applicazione di esempio disponibile in [Node.js, esempio Amazon Timestream LiveAnalytics ](https://github.com/awslabs/amazon-timestream-tools/tree/mainline/sample_apps/js) per l'applicazione su. GitHub

```
async function describeDatabase () {
    console.log("Describing Database");
    const params = {
        DatabaseName: constants.DATABASE_NAME
    };
 
    const promise = writeClient.describeDatabase(params).promise();
 
    await promise.then(
        (data) => {
            console.log(`Database ${data.Database.DatabaseName} has id ${data.Database.Arn}`);
        },
        (err) => {
            if (err.code === 'ResourceNotFoundException') {
                console.log("Database doesn't exist.");
            } else {
                console.log("Describe database failed.", err);
                throw err;
            }
        }
    );
}
```

------
#### [  .NET  ]

```
        public async Task DescribeDatabase()
        {
            Console.WriteLine("Describing Database");

            try
            {
                var describeDatabaseRequest = new DescribeDatabaseRequest
                {
                    DatabaseName = Constants.DATABASE_NAME
                };
                DescribeDatabaseResponse response = await writeClient.DescribeDatabaseAsync(describeDatabaseRequest);
                Console.WriteLine($"Database {Constants.DATABASE_NAME} has id:{response.Database.Arn}");
            }
            catch (ResourceNotFoundException)
            {
                Console.WriteLine("Database does not exist.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Describe database failed:" + e.ToString());
            }

        }
```

------