取消作业

尝试取消作业。

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如需查看包含此代码示例的详细文档，请参阅以下内容：

• 管理作业

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"
)

// cancelJob demonstrates how a job cancellation request can be issued for a specific
// BigQuery job.
func cancelJob(projectID, jobID string) error {
	// projectID := "my-project-id"
	// jobID := "my-job-id"
	ctx := context.Background()

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

	job, err := client.JobFromID(ctx, jobID)
	if err != nil {
		return nil
	}
	return job.Cancel(ctx)
}

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，请设置应用默认凭据。 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.Job;
import com.google.cloud.bigquery.JobId;
import com.google.cloud.bigquery.JobInfo;
import com.google.cloud.bigquery.QueryJobConfiguration;
import java.util.UUID;

// Sample to cancel a job
public class CancelJob {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String query = "SELECT country_name from `bigquery-public-data.utility_us.country_code_iso`";
    cancelJob(query);
  }

  public static void cancelJob(String query) {
    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();

      // Specify a job configuration to set optional job resource properties.
      QueryJobConfiguration queryConfig = QueryJobConfiguration.newBuilder(query).build();

      // The location and job name are optional,
      // if both are not specified then client will auto-create.
      String jobName = "jobId_" + UUID.randomUUID().toString();
      JobId jobId = JobId.newBuilder().setLocation("us").setJob(jobName).build();

      // Create a job with job ID
      bigquery.create(JobInfo.of(jobId, queryConfig));

      // Get a job that was just created
      Job job = bigquery.getJob(jobId);
      if (job.cancel()) {
        System.out.println("Job canceled successfully");
      } else {
        System.out.println("Job was not canceled");
      }
    } catch (BigQueryException e) {
      System.out.println("Job was not canceled.\n" + e.toString());
    }
  }
}

Node.js

试用此示例之前，请按照 BigQuery 快速入门：使用客户端库中的 Node.js 设置说明进行操作。 如需了解详情，请参阅 BigQuery Node.js 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 the Google Cloud client library
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

async function cancelJob() {
  // Attempts to cancel a job.

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const jobId = "existing-job-id";

  // Create a job reference
  const job = bigquery.job(jobId);

  // Attempt to cancel job
  const [apiResult] = await job.cancel();

  console.log(apiResult.job.status);
}

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。

from google.cloud import bigquery


def cancel_job(
    client: bigquery.Client,
    location: str = "us",
    job_id: str = "abcd-efgh-ijkl-mnop",
) -> None:
    job = client.cancel_job(job_id, location=location)
    print(f"{job.location}:{job.job_id} cancelled")

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。