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SAP Netweaver Gateway ODBC Driver
SAP Netweaver Gateway ODBC Driver を使って、ODBC 接続をサポートするあらゆるアプリケーション・ツールからSAP Netweaver Gateway にデータ連携。
SAP Netweaver Gateway データにデータベースと同感覚でアクセスして、SAP Netweaver Gateway のEntities データに使い慣れたODBC インターフェースで双方向連携。
The CData ODBC Driver for SAP Netweaver Gateway makes it easy to integrate connectivity to live SAP Netweaver Gateway のデータ with standard data access components in C++Builder. This article shows how to create a simple visual component library (VCL) application in C++Builder that connects to SAP Netweaver Gateway のデータ, executes queries, and displays the results in a grid. An additional section shows how to use FireDAC components to execute commands from code.
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.
SAP Gateway はBasic 認証とOAuth 2.0 認証の両方を許可します。Basic 認証を使用して自分のアカウントに接続するか、OAuth を使用して他のユーザーが彼らのアカウントでサービスからデータを取得できるようにすることができます。基本となる認証情報に加え、SAP Gateway テーブルへのアクセスには以下の追加プロパティが必要です。
Basic 認証では、自分のログインクレデンシャルを使用して接続します。次のプロパティを設定します。
ユーザー資格情報の接続プロパティを設定せずに接続できます。 接続すると、CData 製品はデフォルトブラウザでSAP Gateway OAuth エンドポイントを開きます。ログインして、CData 製品にアクセス許可を与えます。CData 製品が以下のOAuth プロセスを完了します。 他のOAuth 認証フローについては、ヘルプドキュメントの「OAuth 認証の使用」を参照してください。
You can then follow the steps below to use the Data Explorer to create a FireDAC connection to SAP Netweaver Gateway.
Follow the procedure below to start querying SAP Netweaver Gateway のデータ from a simple VCL application that displays the results of a query in a grid.
Drop a TFDConnection component onto the form and set the following properties:
Drop a TFDQuery component onto the form and set the properties below:
SQL: Click the button in the SQL property and enter a query. For example:
SELECT ProductID, Quantity FROM SalesOrderLineItems WHERE Quantity < 15
Drop a TDataSource component onto the form and set the following property:
Drop a TDBGrid control onto the form and set the following property:
You can use the TFDConnection and TFQuery components to execute queries to SAP Netweaver Gateway のデータ. This section provides sapgatewayspecific examples of executing queries with the TFQuery component.
To connect to the data source, set the Connected property of the TFDConnection component to true. You can set the same properties from code:
FDConnection1->ConnectionDefName = "CData SAP Netweaver Gateway ODBC Source";
FDConnection1->Connected = true;
To connect the TFDQuery component to SAP Netweaver Gateway のデータ, set the Connection property of the component. When a TFDQuery component is added at design time, its Connection property is automatically set to point to a TFDConnection on the form, as in the application above.
To create a parameterized query, use the following syntax below:
FDQuery1->SQL->Text = "select * from SalesOrderLineItems where quantity = :Quantity";
FDQuery1->ParamByName("quantity")->AsString = "15";
query->Open();
The example above binds a string-type input parameter by name and then opens the dataset that results.
Preparing statements is costly in system resources and time. The connection must be active and open while a statement is prepared. By default, FireDAC prepares the query to avoid recompiling the same query over and over. To disable statement preparation, set ResourceOptions.DirectExecute to True; for example, when you need to execute a query only once.
To execute a query that returns a result set, such as a select query, use the Open method. The Open method executes the query, returns the result set, and opens it. The Open method will return an error if the query does not produce a result set.
FDQuery1->SQL->Text := "select * from SalesOrderLineItems where quantity = :Quantity";
FDQuery1.ParamByName("quantity")->AsString = "15";
FDQuery1->Open();
To execute a query that does not return a result set, use the ExecSQL method. The ExecSQL method will return an error if the query returns a result set. To retrieve the count of affected rows use the TFD.RowsAffected property.
FDQ.SQL.Text := "delete from SalesOrderLineItems where Id = :Id";
FDQuery1->Params->Items[0]->AsString = "x12345";
FDQuery1->ExecSQL();
AnsiString i = FDQuery1->RowsAffected;
Below you can find other articles for using the CData ODBC Driver with RAD Studio, Delphi, and C++ Builder.