描述資料庫 - Amazon Timestream

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

描述資料庫

您可以使用下列程式碼片段來取得新建立資料庫屬性的相關資訊。

注意

這些程式碼片段是以 上的完整範例應用程式為基礎GitHub。如需如何開始使用範例應用程式的詳細資訊，請參閱 範例應用程式。

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

下列程式碼片段用於 AWS SDK JavaScript v3。如需如何安裝用戶端和用量的詳細資訊，請參閱 Timestream Write Client - AWS SDK for JavaScript v3。

另請參閱類別 DescribeDatabaseCommand 和 DescribeDatabase。

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;
    }
}

下列程式碼片段使用 AWS SDK JavaScript V2 樣式的 。它以 Node.js 範例應用程式為基礎，適用於 上的 LiveAnalytics 應用程式 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());
            }

        }