更新表

使用客户管理的加密密钥更新表。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

• 客户管理的 Cloud KMS 密钥

代码示例

Go

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Go 设置说明进行操作。 如需了解详情，请参阅 BigQuery Go API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为客户端库设置身份验证。

import (
	"context"
	"fmt"

	"cloud.google.com/go/bigquery"
)

// updateTableChangeCMEK demonstrates how to change the customer managed encryption key that protects a table.
func updateTableChangeCMEK(projectID, datasetID, tableID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydatasetid"
	// tableID := "mytableid"
	ctx := context.Background()

	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %w", err)
	}
	defer client.Close()

	tableRef := client.Dataset(datasetID).Table(tableID)
	meta, err := tableRef.Metadata(ctx)
	if err != nil {
		return err
	}
	update := bigquery.TableMetadataToUpdate{
		EncryptionConfig: &bigquery.EncryptionConfig{
			// TODO: Replace this key with a key you have created in Cloud KMS.
			KMSKeyName: "projects/cloud-samples-tests/locations/us-central1/keyRings/test/cryptoKeys/otherkey",
		},
	}
	if _, err := tableRef.Update(ctx, update, meta.ETag); err != nil {
		return err
	}
	return nil
}

Java

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Java 设置说明进行操作。 如需了解详情，请参阅 BigQuery Java API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为客户端库设置身份验证。

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.EncryptionConfiguration;
import com.google.cloud.bigquery.Table;
import com.google.cloud.bigquery.TableId;

// Sample to update a cmek table
public class UpdateTableCmek {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String tableName = "MY_TABLE_NAME";
    String kmsKeyName = "MY_KEY_NAME";
    // Set a new encryption key to use for the destination.
    // i.e. projects/{project}/locations/{location}/keyRings/{key_ring}/cryptoKeys/{cryptoKey}
    EncryptionConfiguration encryption =
        EncryptionConfiguration.newBuilder().setKmsKeyName(kmsKeyName).build();
    updateTableCmek(datasetName, tableName, encryption);
  }

  public static void updateTableCmek(
      String datasetName, String tableName, EncryptionConfiguration encryption) {
    try {
      // Initialize client that will be used to send requests. This client only needs to be created
      // once, and can be reused for multiple requests.
      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();

      Table table = bigquery.getTable(TableId.of(datasetName, tableName));
      bigquery.update(table.toBuilder().setEncryptionConfiguration(encryption).build());
      System.out.println("Table cmek updated successfully");
    } catch (BigQueryException e) {
      System.out.println("Table cmek was not updated. \n" + e.toString());
    }
  }
}

Python

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Python 设置说明进行操作。 如需了解详情，请参阅 BigQuery Python API 参考文档。

如需向 BigQuery 进行身份验证，请设置应用默认凭证。如需了解详情，请参阅为客户端库设置身份验证。

# from google.cloud import bigquery
# client = bigquery.Client()

assert table.encryption_configuration.kms_key_name == original_kms_key_name

# Set a new encryption key to use for the destination.
# TODO: Replace this key with a key you have created in KMS.
updated_kms_key_name = (
    "projects/cloud-samples-tests/locations/us/keyRings/test/cryptoKeys/otherkey"
)
table.encryption_configuration = bigquery.EncryptionConfiguration(
    kms_key_name=updated_kms_key_name
)

table = client.update_table(table, ["encryption_configuration"])  # API request

assert table.encryption_configuration.kms_key_name == updated_kms_key_name
assert original_kms_key_name != updated_kms_key_name

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅Google Cloud 示例浏览器。