RMySQL and RPostgreSQL interaction

On 12-09-18 01:30 PM, Sebastian P. Luque wrote:

On Tue, 18 Sep 2012 11:40:26 -0400,
Paul Gilbert <pgilbert902 at gmail.com> wrote:

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've seen this with a vignette using both the maptools and trip
packages, but it was just a warning and the vignette built just fine.

Yes, it is just a warning, and the vignette builds fine. It also looks 
like there is probably a simple fix to remove the problem that causes 
the warning, since that is what the warning suggests. However, as 
Spencer pointed out, isolating a simple example is not so easy.

Paul