如何在Google BigQuery中获取数据集名称,包括"publicdata"

Question

我为google BigQuery创建了jdbc连接,如下所示

    Class.forName("net.starschema.clouddb.jdbc.BQDriver");
    conn = DriverManager.getConnection("jdbc:BQDriver:"projectID"?transformQuery=true&user="client ID"&password="client secret");

然后我得到目录名称如下

 ResultSet m_resultSet = conn.getMetaData().getCatalogs();
 while (m_resultSet.next())
 {
     System.out.println(m_resultSet.getString(4));
 }

但现在我想获取数据集名称.它返回null.

我可以获得publicdata的数据集名称吗？如何？？

Answer 1

您可以使用以下代码获取项目、数据集和表格的列表。

要获取公共数据，您可以使用以下代码

var SampleTableList = Service.Tables.List("publicdata", "samples").Execute();

由于 publicdata 只有一个数据集（样本），因此我们无法添加新的数据集，因此此代码可以正常工作。

修改ServiceAccountEmail、KeyFile路径、Key Secret等属性。

using Google.Apis.Auth.OAuth2;
using System.IO;
using System.Threading;
using Google.Apis.Bigquery.v2;
using Google.Apis.Bigquery.v2.Data;
using System.Data;
using Google.Apis.Services;
using System;
using System.Security.Cryptography.X509Certificates;

namespace GoogleBigQuery
{
    public class Class1
    {
        private static void Main()
        {
            try
            {
                String serviceAccountEmail = "SERVICE ACCOUNT EMAIL";

                var certificate = new X509Certificate2(@"KEY FILE NAME & PATH", "KEY SECRET", X509KeyStorageFlags.Exportable);

                // SYNTAX: var certificate=new X509Certificate2(KEY FILE PATH+NAME (Here it resides in Bin\Debug folder so only name is enough), SECRET KEY, X509KeyStorageFlags.Exportable);

                ServiceAccountCredential credential = new ServiceAccountCredential(
                   new ServiceAccountCredential.Initializer(serviceAccountEmail)
                   {
                       Scopes = new[] { BigqueryService.Scope.Bigquery, BigqueryService.Scope.BigqueryInsertdata, BigqueryService.Scope.CloudPlatform, BigqueryService.Scope.DevstorageFullControl }
                   }.FromCertificate(certificate));

                //  Create and initialize the Bigquery service. Use the Project Name value
                //  from the New Project window for the ApplicationName variable.

                BigqueryService Service = new BigqueryService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = credential,
                    ApplicationName = "APPLICATION NAME"
                });


                var SampleTableList = Service.Tables.List("publicdata", "samples").Execute();

                var projectList = Service.Projects.List().Execute();

                foreach (var projectDet in projectList.Projects)
                {
                    var DataSetList = Service.Datasets.List(projectDet.Id).Execute();

                    foreach (var DataSetDet in DataSetList.Datasets)
                    {
                        var TablesList = Service.Tables.List(projectDet.Id, DataSetDet.Id).Execute();
                    }
                }

            }
            catch (Exception e)
            {
                Console.WriteLine("Error Occurred: " + e.Message);
            }

            Console.ReadLine();
        }
    }
}