Persistence extensions request


I’m storing data using the db4o persistence service, all seems to work fine.
For some calculations, I need to know when the first occurrence of an item was stored.
I found this list of extensions : but I’m looking for something like:

<>.firstUpdate - Query for the first update timestamp of a given item…

How difficult is it to make such an extension or are there better/easier ways of doing this ?

I would suggest that you start this discussion on the Eclipse SmartHome forums. The suggested change would require changes to OH 1’s core and development on OH 1’s core is frozen (i.e. no new additions, only major bug fixes). For OH 2 the core functionality is being implemented in the ESH project.