For the remaining Java developers, a new JDBC package has been released for PostgreSQL version 9.0.0.
Note that there is also now support for Python3 as a language for stored procedures.
There are at least a dozen different languages that can be used to write stored procedures in PostgreSQL 9.0.0, these are detailed here and here:
- PgSQL (the 'default' procedural language)
- Python (versions 2 & 3)
- Linux/Unix shell