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How to view BigQuery データ in RAD Studio Data Explorer using the CData ODBC Driver for BigQuery.
最終更新日:2023-06-12Embarcadero RAD Studio provides a development environment for Delphi and C++Builder applications. With the CData ODBC Driver for BigQuery, you gain access to live BigQuery データ within RAD Studio, abstracting the data into tables, views, and stored procedures that can be used to both retrieve and update BigQuery データ. This article will walk through connecting to BigQuery using the Data Explorer.
Configure a Connection to BigQuery
If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.
BigQuery 接続プロパティの取得・設定方法
Google BigQuery はOAuth 認証標準を使用します。個々のユーザーとしてGoogle API にアクセスするには、組み込みクレデンシャルを使うか、OAuth アプリを作成します。
OAuth では、Google Apps ドメインのユーザーとしてサービスアカウントを使ってアクセスすることもできます。サービスカウントでの認証では、OAuth JWT を取得するためのアプリケーションを登録する必要があります。
OAuth 値に加え、DatasetId、ProjectId を設定する必要があります。詳細はヘルプドキュメントの「はじめに」を参照してください。
Connecting to BigQuery データ Using Data Explorer
You can create a simple application for displaying BigQuery データ by utilizing the CData FireDAC Components for BigQuery and a new VCL Forms Application:
- Open the Data Explorer in RAD Studio and expand FireDAC.
- Right-click the ODBC Data Source node in the Data Explorer.
- Click Add New Connection.
- Enter a name for the connection.
- In the FireDAC Connection Editor that appears, set the DataSource property to the name of the ODBC DSN for BigQuery.
- Back in the Data Explorer, expand the tables for the connection.
Create a new VCL Forms application and drag a table (for example: Orders) onto the form.
- Select the OrdersTable object on the form and set the Active property to true.
Right-click on the object, bind visually, and link everything (*) to a new control (TStringGrid).
Arrange the TStringGrid on the form and run the application to see the Orders data.
Related Articles
Below you can find other articles for using the CData ODBC Driver with RAD Studio, Delphi, and C++ Builder.