撤消对数据集的访问权限

移除用户或群组对 BigQuery 数据集的访问权限。

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：

• 使用 IAM 控制对资源的访问权限

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，请设置应用默认凭据。 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"
)

// revokeDatasetAccess updates the access control on a dataset to remove all
// access entries that reference a specific entity.
func revokeDatasetAccess(projectID, datasetID, entity string) error {
	// projectID := "my-project-id"
	// datasetID := "mydataset"
	// entity := "[e-mail]"
	ctx := context.Background()
	client, err := bigquery.NewClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("bigquery.NewClient: %w", err)
	}
	defer client.Close()

	ds := client.Dataset(datasetID)
	meta, err := ds.Metadata(ctx)
	if err != nil {
		return err
	}

	var newAccessList []*bigquery.AccessEntry
	for _, entry := range meta.Access {
		if entry.Entity != entity {
			newAccessList = append(newAccessList, entry)
		}
	}

	// Only proceed with update if something in the access list was removed.
	// Additionally, we use the ETag from the initial metadata to ensure no
	// other changes were made to the access list in the interim.
	if len(newAccessList) < len(meta.Access) {

		update := bigquery.DatasetMetadataToUpdate{
			Access: newAccessList,
		}
		if _, err := ds.Update(ctx, update, meta.ETag); err != nil {
			return err
		}
	}
	return nil
}

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，请设置应用默认凭据。 如需了解详情，请参阅为客户端库设置身份验证。

# TODO(developer): Set dataset_id to the ID of the dataset to fetch.
dataset_id = "your-project.your_dataset"

# TODO(developer): Set entity_id to the ID of the email or group from whom you are revoking access.
entity_id = "[e-mail]"

from google.cloud import bigquery

# Construct a BigQuery client object.
client = bigquery.Client()

dataset = client.get_dataset(dataset_id)  # Make an API request.

entries = list(dataset.access_entries)
dataset.access_entries = [
    entry for entry in entries if entry.entity_id != entity_id
]

dataset = client.update_dataset(
    dataset,
    # Update just the `access_entries` property of the dataset.
    ["access_entries"],
)  # Make an API request.

full_dataset_id = f"{dataset.project}.{dataset.dataset_id}"
print(f"Revoked dataset access for '{entity_id}' to ' dataset '{full_dataset_id}.'")

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。