A PostgreSQL Interface for Excel Online Data

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Excel Online JDBC Driver

Rapidly create and deploy powerful Java applications that integrate with live Excel Online Spreadsheet data!



Use the Remoting features of the Excel Online JDBC Driver to create a PostgreSQL entry-point for data access.

There are a vast number of PostgreSQL clients available on the Internet. From standard Drivers to BI and Analytics tools, PostgreSQL is a popular interface for data access. Using our JDBC Drivers, you can now create PostgreSQL entry-points that you can connect to from any standard client.

To access Excel Online data as a PostgreSQL database, use the CData JDBC Driver for Excel Online and a JDBC foreign data wrapper (FDW). In this article, we compile the FDW, install it, and query Excel Online data from PostgreSQL Server.

Connect to Excel Online Data as a JDBC Data Source

To connect to Excel Online as a JDBC data source, you will need the following:

  • Driver JAR path: The JAR is located in the lib subfolder of the installation directory.
  • Driver class: cdata.jdbc.excelonline.ExcelOnlineDriver

  • JDBC URL: The URL must start with "jdbc:excelonline:" and can include any of the connection properties in name-value pairs separated with semicolons.

    You can connect to a workbook by providing authentication to Excel Online and then setting the following properties:

    • Workbook: Set this to the name or Id of the workbook.

      If you want to view a list of information about the available workbooks, execute a query to the Workbooks view after you authenticate.

    • UseSandbox: Set this to true if you are connecting to a workbook in a sandbox account. Otherwise, leave this blank to connect to a production account.

    You use the OAuth authentication standard to authenticate to Excel Online. See the Getting Started section in the help documentation for a guide. Getting Started also guides you through executing SQL to worksheets and ranges.

    Built-in Connection String Designer

    For assistance in constructing the JDBC URL, use the connection string designer built into the Excel Online JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

    java -jar cdata.jdbc.excelonline.jar

    Fill in the connection properties and copy the connection string to the clipboard.

    A typical JDBC URL is below:

    jdbc:excelonline:InitiateOAuth=GETANDREFRESH

Build the JDBC Foreign Data Wrapper

The Foreign Data Wrapper can be installed as an extension to PostgreSQL, without recompiling PostgreSQL. The jdbc2_fdw extension is used as an example (downloadable here).

  1. Add a symlink from the shared object for your version of the JRE to /usr/lib/libjvm.so. For example: ln -s /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server/libjvm.so /usr/lib/libjvm.so
  2. Start the build: make install USE_PGXS=1

Query Excel Online Data as a PostgreSQL Database

After you have installed the extension, follow the steps below to start executing queries to Excel Online data:

  1. Log into your database.
  2. Load the extension for the database: CREATE EXTENSION jdbc2_fdw;
  3. Create a server object for Excel Online: CREATE SERVER ExcelOnline FOREIGN DATA WRAPPER jdbc2_fdw OPTIONS ( drivername 'cdata.jdbc.excelonline.ExcelOnlineDriver', url 'jdbc:excelonline:InitiateOAuth=GETANDREFRESH', querytimeout '15', jarfile '/home/MyUser/CData/CData\ JDBC\ Driver\ for\ Salesforce MyDriverEdition/lib/cdata.jdbc.excelonline.jar');
  4. Create a user mapping for the username and password of a user known to the MySQL daemon. CREATE USER MAPPING for postgres SERVER ExcelOnline OPTIONS ( username 'admin', password 'test');
  5. Create a foreign table in your local database: postgres=# CREATE FOREIGN TABLE test_xlsx_sheet1 ( test_xlsx_sheet1_id text, test_xlsx_sheet1_Id text, test_xlsx_sheet1_Column1 numeric) SERVER ExcelOnline OPTIONS ( table_name 'test_xlsx_sheet1');
You can now execute read/write commands to Excel Online: postgres=# SELECT * FROM test_xlsx_sheet1;