statement id

Is there any way to find out the statement context in a server function?
Is there anyway to find out the transaction context in a server function?

I have a plpython function I want to run and it can store data for the
context of a session. But I only want the memory to last the duration
of a statement or a transaction. It is not a trigger function which has
a transaction dictionary. If I knew the statement or transaction id I could
initialize the memory for multiple calls within the session.
Statement (subselect) level would be best as it would enable managing
data from several calls to the same function. Sort of.

If this were a C function, would it be easier to have this information?

thanks,

elein

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elein(at)varlena(dot)com Database Consulting www.varlena.com
I have always depended on the [QA] of strangers.