更新例程

更新现有例程资源。

代码示例

Go

尝试此示例之前,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

import (
	"context"
	"fmt"

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

// updateRoutine demonstrates updating an existing BigQuery UDF using the routine API.
func updateRoutine(projectID, datasetID, routineID string) error {
	// projectID := "my-project-id"
	// datasetID := "mydatasetid"
	// routineID := "myroutineid"
	ctx := context.Background()

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

	routineRef := client.Dataset(datasetID).Routine(routineID)

	// fetch existing metadata
	meta, err := routineRef.Metadata(ctx)
	if err != nil {
		return fmt.Errorf("couldn't retrieve metadata: %v", err)
	}

	// Due to a limitation in the backend, supply all the properties for update.
	update := &bigquery.RoutineMetadataToUpdate{
		Type:        meta.Type,
		Language:    meta.Language,
		Arguments:   meta.Arguments,
		Description: meta.Description,
		ReturnType:  meta.ReturnType,
		Body:        "x * 4",
	}

	if _, err := routineRef.Update(ctx, update, meta.ETag); err != nil {
		return fmt.Errorf("update failed: %v", 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

import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Routine;
import com.google.cloud.bigquery.RoutineId;

// Sample to update routine
public class UpdateRoutine {

  public static void main(String[] args) {
    // TODO(developer): Replace these variables before running the sample.
    String datasetName = "MY_DATASET_NAME";
    String routineName = "MY_ROUTINE_NAME";
    updateRoutine(datasetName, routineName);
  }

  public static void updateRoutine(String datasetName, String routineName) {
    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();

      Routine routine = bigquery.getRoutine(RoutineId.of(datasetName, routineName));
      routine.toBuilder().setBody("x * 4").build().update();
      System.out.println("Routine updated successfully");
    } catch (BigQueryException e) {
      System.out.println("Routine was not updated. \n" + e.toString());
    }
  }
}

Node.js

尝试此示例之前,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

// Import the Google Cloud client library and create a client
const {BigQuery} = require('@google-cloud/bigquery');
const bigquery = new BigQuery();

async function updateRoutine() {
  // Updates a routine named "my_routine" in "my_dataset".

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const datasetId = 'my_dataset';
  // const routineId = 'my_routine';

  const updates = {
    description: 'New description',
  };

  const dataset = bigquery.dataset(datasetId);

  // Create routine reference
  let routine = dataset.routine(routineId);

  // Make API call
  [routine] = await routine.setMetadata(updates);

  console.log(`Routine description: ${routine.description}`);
}
updateRoutine();

Python

尝试此示例之前,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


from google.cloud import bigquery

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

# TODO(developer): Set the fully-qualified ID for the routine.
# routine_id = "my-project.my_dataset.my_routine"

routine = client.get_routine(routine_id)

routine.body = "x * 4"

routine = client.update_routine(
    routine,
    [
        "body",
        # Due to a limitation of the API,
        # all fields are required, not just
        # those that have been updated.
        "arguments",
        "language",
        "type_",
        "return_type",
    ],
)  # Make an API request.

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