Build a PostgreSQL Interface for JD Edwards Data using the CData JDBC Driver

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

Connect to JD Edwards Data as a JDBC Data Source

To connect to JD Edwards 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.jdedwards.JDEdwardsDriver
  

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

  The driver connects to JD Edwards through your Application Interface Services (AIS) Server. Set the following connection properties:

  • URL: The base HTTPS URL of your AIS Server (e.g., https://jde-ais.example.com:8300).
  • User: Your JD Edwards username.
  • Password: Your JD Edwards password.
  • Environment (optional): The JD Edwards environment to use (e.g., PD920 for production or DV920 for development). If not specified, the AIS Server's default environment is used.
  • Role (optional): The JD Edwards role for the session. If not specified, the AIS Server's default role is used.
  • DeviceName (optional): An identifier for the connecting device or application, used for auditing and logging on the AIS Server.
  • Jasserver (optional): The specific Java Application Server (JAS) instance to route requests through, useful in clustered environments.

  Choosing Which Data Is Exposed

  JD Edwards organizes tables and business views by System Code, and the driver exposes each System Code as its own schema. Use these properties to control which schemas are available:

  • DataModel: One or more ERP modules (comma-separated) whose System Codes are exposed as schemas, or All to expose every System Code in the connected instance. Defaults to FinancialManagement.
  • SystemCodes: A comma-separated list of additional System Codes to expose alongside those from DataModel (e.g., 42,43).

  When you connect, the driver sends your credentials to the AIS Server to obtain a session token and caches it. The driver requests a new token automatically before the session expires.

  Built-in Connection String Designer

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

  
  java -jar cdata.jdbc.jdedwards.jar
  

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

  

  A typical JDBC URL is below:

  
  jdbc:jdedwards:URL=https://your-jde-environment-app.example.com;User=admin;Password=myPassword;
  

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 JD Edwards Data as a PostgreSQL Database

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

1. Log into your database.
2. Load the extension for the database:

   
   CREATE EXTENSION jdbc2_fdw;
   

3. Create a server object for JD Edwards:

   
   CREATE SERVER JDEdwards 
   FOREIGN DATA WRAPPER jdbc2_fdw OPTIONS (
   drivername 'cdata.jdbc.jdedwards.JDEdwardsDriver',
   url 'jdbc:jdedwards:URL=https://your-jde-environment-app.example.com;User=admin;Password=myPassword;',
   querytimeout '15',
   jarfile '/home/MyUser/CData/CData\ JDBC\ Driver\ for\ Salesforce MyDriverEdition/lib/cdata.jdbc.jdedwards.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 JDEdwards OPTIONS (
   username 'admin', 
   password 'test');
   

5. Create a foreign table in your local database:

   
   postgres=# CREATE FOREIGN TABLE accountspayable.accountledger (
   accountspayable.accountledger_id text,
   accountspayable.accountledger_DocumentNumber text,
   accountspayable.accountledger_Amount numeric) 
   SERVER JDEdwards OPTIONS (
   table_name 'accountspayable.accountledger');
   

postgres=# SELECT * FROM accountspayable.accountledger;