From my experience, 99.9% of projects redistribute the required java libraries. I've never seen cases when the jar files were pulled from PRMs coming with the OS.
I wonder if there are live uses of "pgjdbc.rpm".
This is a good question and one for which you should have metrics as the latest jar has not been included in the redhat distro for quite some while.
How many tickets do you have asking for the jar ?
Are there any other projects which require the jar ?
