development Development

The PostgreSQL JDBC driver has some unique properties that you should be aware of before starting to develop any code for it. The current development driver supports a number of server versions. This doesn’t mean that every feature must work in every combination, but a reasonable behaviour must be provided for non-supported versions. While this extra compatibility sounds like a lot of work, the actual goal is to reduce the amount of work by maintaining only one code base.

The following tools are required to build and test the driver:

After retrieving the source from the git repository. Move into the top level pgjdbc directory and simply type ./gradlew build -DskipTests . This will build the driver and place it into pgjdbc/build/distributions/postgresql-${version}.jar .

To make sure the driver is working as expected there are a set of JUnit tests that should be run. These require a database to run against that has the plpgsql procedural language installed. The default parameters for username and database are “test”, and for password it’s “test”. So a sample interaction to set this up would look the following, if you enter “password” when asked for it:

postgres@host:~$ createuser -d -A test -P
Enter password for user "test":
Enter it again:

postgres@host:~$ createdb -U test test

postgres@host:~$ createlang plpgsql test

Now we’re ready to run the tests, we simply type ./gradlew clean test , and it should be off and running. To use non default values to run the regression tests, you can create a in the top level directory. This properties file allows you to set values for host, database, user, password, and port with the standard properties “key = value” usage. The ability to set the port value makes it easy to run the tests against a number of different server versions on the same machine.