DML 쓰기 데이터

DML을 사용하여 데이터를 씁니다.

이 코드 샘플이 포함된 문서 페이지

컨텍스트에서 사용된 코드 샘플을 보려면 다음 문서를 참조하세요.

코드 샘플

C#

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

public static async Task WriteUsingDmlCoreAsync(
    string projectId,
    string instanceId,
    string databaseId)
{
    string connectionString =
        $"Data Source=projects/{projectId}/instances/{instanceId}"
        + $"/databases/{databaseId}";

    // Create connection to Cloud Spanner.
    using (var connection =
        new SpannerConnection(connectionString))
    {
        await connection.OpenAsync();

        SpannerCommand cmd = connection.CreateDmlCommand(
            "INSERT Singers (SingerId, FirstName, LastName) VALUES "
               + "(12, 'Melissa', 'Garcia'), "
               + "(13, 'Russell', 'Morales'), "
               + "(14, 'Jacqueline', 'Long'), "
               + "(15, 'Dylan', 'Shaw')");
        int rowCount = await cmd.ExecuteNonQueryAsync();
        Console.WriteLine($"{rowCount} row(s) inserted...");
    }
}

C++

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

void DmlGettingStartedInsert(google::cloud::spanner::Client client) {
  using ::google::cloud::StatusOr;
  namespace spanner = ::google::cloud::spanner;

  auto commit_result = client.Commit(
      [&client](spanner::Transaction txn) -> StatusOr<spanner::Mutations> {
        auto insert = client.ExecuteDml(
            std::move(txn),
            spanner::SqlStatement(
                "INSERT INTO Singers (SingerId, FirstName, LastName) VALUES"
                " (12, 'Melissa', 'Garcia'),"
                " (13, 'Russell', 'Morales'),"
                " (14, 'Jacqueline', 'Long'),"
                " (15, 'Dylan', 'Shaw')"));
        if (!insert) return insert.status();
        return spanner::Mutations{};
      });
  if (!commit_result) {
    throw std::runtime_error(commit_result.status().message());
  }
  std::cout << "Insert was successful [spanner_dml_getting_started_insert]\n";
}

Go

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.


func writeUsingDML(ctx context.Context, w io.Writer, client *spanner.Client) error {
	_, err := client.ReadWriteTransaction(ctx, func(ctx context.Context, txn *spanner.ReadWriteTransaction) error {
		stmt := spanner.Statement{
			SQL: `INSERT Singers (SingerId, FirstName, LastName) VALUES
				(12, 'Melissa', 'Garcia'),
				(13, 'Russell', 'Morales'),
				(14, 'Jacqueline', 'Long'),
				(15, 'Dylan', 'Shaw')`,
		}
		rowCount, err := txn.Update(ctx, stmt)
		if err != nil {
			return err
		}
		fmt.Fprintf(w, "%d record(s) inserted.\n", rowCount)
		return err
	})
	return err
}

자바

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

static void writeUsingDml(DatabaseClient dbClient) {
  // Insert 4 singer records
  dbClient
      .readWriteTransaction()
      .run(
          new TransactionCallable<Void>() {
            @Override
            public Void run(TransactionContext transaction) throws Exception {
              String sql =
                  "INSERT INTO Singers (SingerId, FirstName, LastName) VALUES "
                      + "(12, 'Melissa', 'Garcia'), "
                      + "(13, 'Russell', 'Morales'), "
                      + "(14, 'Jacqueline', 'Long'), "
                      + "(15, 'Dylan', 'Shaw')";
              long rowCount = transaction.executeUpdate(Statement.of(sql));
              System.out.printf("%d records inserted.\n", rowCount);
              return null;
            }
          });
}

Node.js

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

// Imports the Google Cloud client library
const {Spanner} = require('@google-cloud/spanner');

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'my-project-id';
// const instanceId = 'my-instance';
// const databaseId = 'my-database';

// Creates a client
const spanner = new Spanner({
  projectId: projectId,
});

// Gets a reference to a Cloud Spanner instance and database
const instance = spanner.instance(instanceId);
const database = instance.database(databaseId);

database.runTransaction(async (err, transaction) => {
  if (err) {
    console.error(err);
    return;
  }
  try {
    const [rowCount] = await transaction.runUpdate({
      sql: `INSERT Singers (SingerId, FirstName, LastName) VALUES
      (12, 'Melissa', 'Garcia'),
      (13, 'Russell', 'Morales'),
      (14, 'Jacqueline', 'Long'),
      (15, 'Dylan', 'Shaw')`,
    });
    console.log(`${rowCount} records inserted.`);
    await transaction.commit();
  } catch (err) {
    console.error('ERROR:', err);
  } finally {
    // Close the database when finished.
    database.close();
  }
});

PHP

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

use Google\Cloud\Spanner\SpannerClient;
use Google\Cloud\Spanner\Transaction;

/**
 * Inserts sample data into the given database with a DML statement.
 *
 * The database and table must already exist and can be created using
 * `create_database`.
 * Example:
 * ```
 * insert_data($instanceId, $databaseId);
 * ```
 *
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 */
function write_data_with_dml($instanceId, $databaseId)
{
    $spanner = new SpannerClient();
    $instance = $spanner->instance($instanceId);
    $database = $instance->database($databaseId);

    $database->runTransaction(function (Transaction $t) use ($spanner) {
        $rowCount = $t->executeUpdate(
            "INSERT Singers (SingerId, FirstName, LastName) VALUES "
            . "(12, 'Melissa', 'Garcia'), "
            . "(13, 'Russell', 'Morales'), "
            . "(14, 'Jacqueline', 'Long'), "
            . "(15, 'Dylan', 'Shaw')");
        $t->commit();
        printf('Inserted %d row(s).' . PHP_EOL, $rowCount);
    });
}

Python

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

# instance_id = "your-spanner-instance"
# database_id = "your-spanner-db-id"
spanner_client = spanner.Client()
instance = spanner_client.instance(instance_id)
database = instance.database(database_id)

def insert_singers(transaction):
    row_ct = transaction.execute_update(
        "INSERT Singers (SingerId, FirstName, LastName) VALUES "
        "(12, 'Melissa', 'Garcia'), "
        "(13, 'Russell', 'Morales'), "
        "(14, 'Jacqueline', 'Long'), "
        "(15, 'Dylan', 'Shaw')"
    )
    print("{} record(s) inserted.".format(row_ct))

database.run_in_transaction(insert_singers)

Ruby

Cloud Spanner용 클라이언트 라이브러리를 설치하고 사용하는 방법은 Cloud Spanner 클라이언트 라이브러리를 참조하세요.

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"

require "google/cloud/spanner"

spanner = Google::Cloud::Spanner.new project: project_id
client  = spanner.client instance_id, database_id
row_count = 0

client.transaction do |transaction|
  row_count = transaction.execute_update(
    "INSERT INTO Singers (SingerId, FirstName, LastName) VALUES
     (12, 'Melissa', 'Garcia'),
     (13, 'Russell', 'Morales'),
     (14, 'Jacqueline', 'Long'),
     (15, 'Dylan', 'Shaw'),
     (16, 'Billie', 'Eillish'),
     (17, 'Judy', 'Garland'),
     (18, 'Taylor', 'Swift'),
     (19, 'Miley', 'Cyrus'),
     (20, 'Michael', 'Jackson'),
     (21, 'Ariana', 'Grande'),
     (22, 'Elvis', 'Presley'),
     (23, 'Kanye', 'West'),
     (24, 'Lady', 'Gaga'),
     (25, 'Nick', 'Jonas')"
  )
end

puts "#{row_count} records inserted."

다음 단계

다른 Google Cloud 제품의 코드 샘플을 검색하고 필터링하려면 Google Cloud 샘플 브라우저를 참조하세요.