There is currently no connection property that will give you the process ID of the external environment.

Note that a single database connection could be associated with multiple external environments. For example, if the a connection was using a combination of C and PHP or PHP and PERL or C and PERL or ... (you get the idea). If this were the case then there could be multiple external process IDs. This complicates the issue - If we were to create a property then we would need to be able to list multiple PIDs.

If you wanted to know the pid of the external process, you could determine this yourself by implementing a external procedure which used getpid() and include this in your external library. If you included such a routine in each external library that you used and uniquely named the routines - e.g. getpid_c(), getpid_php(), getpid_perl(), etc - then you could determine the pid of each external process that the connection was associated with. Perhaps this would be a good example to include in the packaged samples?