Viewing Parquet データ in RAD Studio Data Explorer

Embarcadero RAD Studio provides a development environment for Delphi and C++Builder applications. With the CData ODBC Driver for Parquet, you gain access to live Parquet データ within RAD Studio, abstracting the data into tables, views, and stored procedures that can be used to both retrieve Parquet データ. This article will walk through connecting to Parquet using the Data Explorer.

Configure a Connection to Parquet

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.

Parquet 接続プロパティの取得・設定方法

ローカルのParquet ファイルに接続するには、URI 接続プロパティをParquet ファイルへのパスに設定してください。

Connecting to Parquet データ Using Data Explorer

You can create a simple application for displaying Parquet データ by utilizing the CData FireDAC Components for Parquet and a new VCL Forms Application:

1. Open the Data Explorer in RAD Studio and expand FireDAC.
2. Right-click the ODBC Data Source node in the Data Explorer.
3. Click Add New Connection.
4. Enter a name for the connection.
5. In the FireDAC Connection Editor that appears, set the DataSource property to the name of the ODBC DSN for Parquet.
6. Back in the Data Explorer, expand the views for the connection.

7. Create a new VCL Forms application and drag a view (for example: SampleTable_1) onto the form.

8. Select the SampleTable_1View object on the form and set the Active property to true.

9. Right-click on the object, bind visually, and link everything (*) to a new control (TStringGrid).

10. Arrange the TStringGrid on the form and run the application to see the SampleTable_1 data.

Related Articles

Below you can find other articles for using the CData ODBC Driver with RAD Studio, Delphi, and C++ Builder.

• DataBind Controls to Parquet データ in C++Builder
• DataBind Controls to Parquet データ in Delphi
• Build a Simple VCL Application for Parquet データ