取得處理常式

取得指定常式 ID 的常式資源。

程式碼範例

Go

在試用這個範例之前，請先按照「使用用戶端程式庫的 BigQuery 快速入門導覽課程」中的 Go 設定說明操作。詳情請參閱 BigQuery Go API 參考說明文件。

如要向 BigQuery 進行驗證，請設定應用程式預設憑證。詳情請參閱「設定用戶端程式庫的驗證作業」。

import (
	"context"
	"fmt"
	"io"

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

// getRoutine demonstrates getting a routine's metadata via the API.
func getRoutine(w io.Writer, 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: %w", err)
	}
	defer client.Close()

	meta, err := client.Dataset(datasetID).Routine(routineID).Metadata(ctx)
	if err != nil {
		return fmt.Errorf("couldn't retrieve routine metadata: %w", err)
	}
	// Print information about the routine.
	fmt.Fprintf(w, "Routine %s:\n", routineID)
	fmt.Fprintf(w, "\tType %s:\n", meta.Type)
	fmt.Fprintf(w, "\tLanguage %s:\n", meta.Language)
	fmt.Fprintln(w, "\tArguments:")
	for _, v := range meta.Arguments {
		fmt.Fprintf(w, "\t\tName: %s\tType: %v", v.Name, v.DataType)
	}
	return nil
}

Java

在試用這個範例之前，請先按照「使用用戶端程式庫的 BigQuery 快速入門導覽課程」中的 Java 設定說明操作。詳情請參閱 BigQuery Java API 參考說明文件。

如要向 BigQuery 進行驗證，請設定應用程式預設憑證。詳情請參閱「設定用戶端程式庫的驗證作業」。

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 get a routine
public class GetRoutine {

  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";
    getRoutine(datasetName, routineName);
  }

  public static void getRoutine(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();

      RoutineId routineId = RoutineId.of(datasetName, routineName);
      Routine routine = bigquery.getRoutine(routineId);
      System.out.println("Routine retrieved successfully" + routine.getDescription());
    } catch (BigQueryException e) {
      System.out.println("Routine not retrieved. \n" + e.toString());
    }
  }
}

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽工具。