[R-sig-DB] RMySQL and RPostgreSQL interaction

[Paul Gilbert]

I am doing some comparison for which I load both RMySQL and RPostgreSQL 
from my own packages TSMySQL and TSPostgreSQL and I am getting the 
following warning building a vignette. I think with package namespaces / 
S4 definitions it is a bit difficult to generate a self contained 
example, at least I have not yet managed to do that, but I would 
appreciate any suggestions about what needs to be done.

Loading required package: TSPostgreSQL
Loading required package: RPostgreSQL
Warning in .simpleDuplicateClass(def, prev) :
   A specification for class "dbObjectId" in package 'RPostgreSQL' seems 
equivalent to one from package 'RMySQL' and is not turning on duplicate 
class definitions for this class

(I'm using  R version 2.15.1 on Ubuntu.)

Thanks,
Paul