Can't connect to a Postgres db in a PHP portlet

• Type: Bug
• Status: Closed
• Resolution: No Longer Reproducible
• Affects Version/s: 6.1.0 CE GA1
• Fix Version/s: --Sprint 11/12, 6.2.0 CE M2
• Component/s: Environments, Environments > Databases
• Labels:
  • 6.0.6
  • community-verifier
  • postgresql
  • problem
• Environment: Liferay 6.0.6; Tomcat 6.0.29; ; Debian Linux(5.0).; Java version "1.6.0_20"; Postgresql 8.3.11
• Branch Version/s:
  6.0.x

When writing a PHP portlet, I am unable to create a connection to a Postgresql db using pg_connect(), the portlet displays:

Warning: A link to the server could not be established. java.lang.ClassCastException: org.postgresql.Driver cannot be cast to javax.sql.DataSource [pg_connect]

As a test, I've also tried to connect to a mysql db using php's mysql_connect(), which does work and I can query the db etc, so it seems to be a postgesql.jar specific issue.
I've tried this on a couple of different machines with the same result.