Connect to HDFS Data from PowerBuilder

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HDFS ODBC Driver

HDFS 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HDFS にデータ連携。

HDFS データにデータベースと同感覚でアクセスして、HDFS データに使い慣れたODBC インターフェースで双方向連携。



This article demonstrates how to use the CData ODBC Driver for HDFS to connect to HDFS data and execute queries in PowerBuilder.

The CData ODBC Driver for HDFS can be used from any platform or development technology that supports ODBC, including Sybase PowerBuilder. This article shows how to connect to HDFS data and execute queries from the Database Painter and controls such as the DataWindow.

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Create a Profile for the ODBC Driver for HDFS

Follow the steps below to use the Database Painter tool to create a database profile based on an ODBC DSN (data source name) for HDFS. In the Database Painter, you can use wizards and the UI to work with HDFS data.

  1. If you have not already done so, create an ODBC DSN for HDFS. The DSN contains the connection properties required to connect to HDFS data. You can use the Microsoft ODBC Data Source Administrator to create and configure DSNs. This is the last step of installing the driver. Required connection properties are the following:
    • Host
    • Port
    • Path
    • User

    In order to authenticate, set the following connection properties:

    • Host: Set this value to the host of your HDFS installation.
    • Port: Set this value to the port of your HDFS installation. Default port: 50070
    See the help documentation for a guide to creating a HDFS DSN.
  2. In PowerBuilder, click Tools -> Database Painter.
  3. In the Objects window in the Database Painter, right-click the ODBC node and click New Profile.
  4. On the Connection tab, enter a name for the profile and select the HDFS DSN in the Data Source menu.
  5. To view and modify a table, right-click a table and then click Edit Data -> Grid.

Using HDFS Data with PowerBuilder Controls

You can use standard PowerBuilder objects to connect to ODBC data sources and execute queries. The following example shows how to retrieve HDFS data into a DataWindow. You can add the following code to the open method:

SQLCA.DBMS = "ODBC" SQLCA.DBParm = "ConnectString='DSN=CData HDFS Source'" CONNECT USING SQLCA; dw_files.SetTransObject(SQLCA); dw_files.Retrieve();