Create table with TIMESTAMP column

Create a table with a TIMESTAMP column.

Code sample

C++

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

void CreateTableWithTimestamp(  google::cloud::spanner_admin::DatabaseAdminClient client,  std::string const& project_id, std::string const& instance_id,  std::string const& database_id) {  google::cloud::spanner::Database database(project_id, instance_id,  database_id);  auto metadata = client  .UpdateDatabaseDdl(database.FullName(), {R"""(  CREATE TABLE Performances (  SingerId INT64 NOT NULL,  VenueId INT64 NOT NULL,  EventDate Date,  Revenue INT64,  LastUpdateTime TIMESTAMP NOT NULL OPTIONS  (allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers ON DELETE CASCADE)"""})  .get();  google::cloud::spanner_testing::LogUpdateDatabaseDdl( //! TODO(#4758)  client, database, metadata.status()); //! TODO(#4758)  if (!metadata) throw std::move(metadata).status();  std::cout << "`Performances` table created, new DDL:\n"  << metadata->DebugString(); }

C#

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

 using Google.Cloud.Spanner.Data; using System.Threading.Tasks; public class CreateTableWithTimestampColumnAsyncSample {  public async Task CreateTableWithTimestampColumnAsync(string projectId, string instanceId, string databaseId)  {  string connectionString = $"Data Source=projects/{projectId}/instances/{instanceId}/databases/{databaseId}";  using var connection = new SpannerConnection(connectionString);  // Define create table statement for table with commit timestamp column.  string createTableStatement =  @"CREATE TABLE Performances (  SingerId INT64 NOT NULL,  VenueId INT64 NOT NULL,  EventDate Date,  Revenue INT64,  LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers ON DELETE CASCADE";  var cmd = connection.CreateDdlCommand(createTableStatement);  await cmd.ExecuteNonQueryAsync();  } }

Go

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

 import ( "context" "fmt" "io" database "cloud.google.com/go/spanner/admin/database/apiv1" adminpb "cloud.google.com/go/spanner/admin/database/apiv1/databasepb" ) func createTableWithTimestamp(w io.Writer, db string) error { ctx := context.Background() adminClient, err := database.NewDatabaseAdminClient(ctx) if err != nil { return err } defer adminClient.Close() op, err := adminClient.UpdateDatabaseDdl(ctx, &adminpb.UpdateDatabaseDdlRequest{ Database: db, Statements: []string{ `CREATE TABLE Performances ( SingerId INT64 NOT NULL, VenueId INT64 NOT NULL, EventDate Date, Revenue INT64, LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true) ) PRIMARY KEY (SingerId, VenueId, EventDate), INTERLEAVE IN PARENT Singers ON DELETE CASCADE`, }, }) if err != nil { return err } if err := op.Wait(ctx); err != nil { return err } fmt.Fprintf(w, "Created Performances table in database [%s]\n", db) return nil } 

Java

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

static void createTableWithTimestamp(DatabaseAdminClient dbAdminClient, DatabaseId id) {  OperationFuture<Void, UpdateDatabaseDdlMetadata> op =  dbAdminClient.updateDatabaseDdl(  id.getInstanceId().getInstance(),  id.getDatabase(),  Arrays.asList(  "CREATE TABLE Performances ("  + " SingerId INT64 NOT NULL,"  + " VenueId INT64 NOT NULL,"  + " EventDate Date,"  + " Revenue INT64, "  + " LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)"  + ") PRIMARY KEY (SingerId, VenueId, EventDate),"  + " INTERLEAVE IN PARENT Singers ON DELETE CASCADE"),  null);  try {  // Initiate the request which returns an OperationFuture.  op.get();  System.out.println("Created Performances table in database: [" + id + "]");  } catch (ExecutionException e) {  // If the operation failed during execution, expose the cause.  throw (SpannerException) e.getCause();  } catch (InterruptedException e) {  // Throw when a thread is waiting, sleeping, or otherwise occupied,  // and the thread is interrupted, either before or during the activity.  throw SpannerExceptionFactory.propagateInterrupt(e);  } }

Node.js

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// 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 Database Admin Client object const databaseAdminClient = spanner.getDatabaseAdminClient(); // Note: Cloud Spanner interprets Node.js numbers as FLOAT64s, so they // must be converted to strings before being inserted as INT64s const request = [  `CREATE TABLE Performances (  SingerId INT64 NOT NULL,  VenueId INT64 NOT NULL,  EventDate DATE,  Revenue INT64,  LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers ON DELETE CASCADE`, ]; // Creates a table in an existing database const [operation] = await databaseAdminClient.updateDatabaseDdl({  database: databaseAdminClient.databasePath(  projectId,  instanceId,  databaseId,  ),  statements: request, }); console.log(`Waiting for operation on ${databaseId} to complete...`); await operation.promise(); console.log(`Created table Performances in database ${databaseId}.`);

PHP

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

use Google\Cloud\Spanner\Admin\Database\V1\Client\DatabaseAdminClient; use Google\Cloud\Spanner\Admin\Database\V1\UpdateDatabaseDdlRequest; /**  * Creates a table with a commit timestamp column.  * Example:  * ```  * create_table_with_timestamp_column($projectId, $instanceId, $databaseId);  * ```  *  * @param string $projectId The Google Cloud project ID.  * @param string $instanceId The Spanner instance ID.  * @param string $databaseId The Spanner database ID.  */ function create_table_with_timestamp_column(string $projectId, string $instanceId, string $databaseId): void {  $databaseAdminClient = new DatabaseAdminClient();  $databaseName = DatabaseAdminClient::databaseName($projectId, $instanceId, $databaseId);  $statement = 'CREATE TABLE Performances (  SingerId	INT64 NOT NULL,  VenueId	INT64 NOT NULL,  EventDate	DATE,  Revenue	INT64,  LastUpdateTime	TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers on DELETE CASCADE';  $request = new UpdateDatabaseDdlRequest([  'database' => $databaseName,  'statements' => [$statement]  ]);  $operation = $databaseAdminClient->updateDatabaseDdl($request);  print('Waiting for operation to complete...' . PHP_EOL);  $operation->pollUntilComplete();  printf('Created Performances table in database %s on instance %s' . PHP_EOL,  $databaseId, $instanceId); }

Python

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def create_table_with_timestamp(instance_id, database_id):  """Creates a table with a COMMIT_TIMESTAMP column.""" from google.cloud.spanner_admin_database_v1.types import spanner_database_admin spanner_client = spanner.Client() database_admin_api = spanner_client.database_admin_api request = spanner_database_admin.UpdateDatabaseDdlRequest( database=database_admin_api.database_path( spanner_client.project, instance_id, database_id ), statements=[  """CREATE TABLE Performances (  SingerId INT64 NOT NULL,  VenueId INT64 NOT NULL,  EventDate Date,  Revenue INT64,  LastUpdateTime TIMESTAMP NOT NULL  OPTIONS(allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers ON DELETE CASCADE""" ], ) operation = database_admin_api.update_database_ddl(request) print("Waiting for operation to complete...") operation.result(OPERATION_TIMEOUT_SECONDS) print( "Created Performances table on database {} on instance {}".format( database_id, instance_id ) ) 

Ruby

To learn how to install and use the client library for Spanner, see Spanner client libraries.

To authenticate to Spanner, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

# project_id = "Your Google Cloud project ID" # instance_id = "Your Spanner instance ID" # database_id = "Your Spanner database ID" require "google/cloud/spanner" require "google/cloud/spanner/admin/database" database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin db_path = database_admin_client.database_path project: project_id,  instance: instance_id,  database: database_id job = database_admin_client.update_database_ddl database: db_path,  statements: [  "CREATE TABLE Performances (  SingerId INT64 NOT NULL,  VenueId INT64 NOT NULL,  EventDate Date,  Revenue INT64,  LastUpdateTime TIMESTAMP NOT NULL OPTIONS (allow_commit_timestamp=true)  ) PRIMARY KEY (SingerId, VenueId, EventDate),  INTERLEAVE IN PARENT Singers ON DELETE CASCADE"  ] puts "Waiting for update database operation to complete" job.wait_until_done! puts "Created table Performances in #{database_id}"

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