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Connect to HDFS Data from PowerBuilder
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 PowerBuilder. This article shows how to connect to HDFS data and execute queries from the Database Painter and controls such as the DataWindow.
Connect to HDFS as an ODBC Data Source
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.
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
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.
- In PowerBuilder, click Tools -> Database Painter.
- In the Objects window in the Database Painter, right-click the ODBC node and click New Profile.
- On the Connection tab, enter a name for the profile and select the HDFS DSN in the Data Source menu.
![]( "The ODBC DSN, required to create the Database Profile. (Salesforce is shown.)")
- 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();
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HDFS ODBC Driver
The HDFS ODBC Driver is a powerful tool that allows you to connect with live data from HDFS, directly from any applications that support ODBC connectivity.
Access HDFS data like you would a database - read, write, and update HDFS HDFSData, etc. through a standard ODBC Driver interface.
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