> We already have a TODO for this:
>
> * Add transaction_timestamp(), statement_timestamp(), clock_timestamp()
> functionality
I like the idea of having a function for statement start time. I
think I'll incorporate it into my patch.
The suggested naming convention in the TODO is good as well. I'd be
inclined to make those *_timestamp() functions the core functions,
and then make things like now() and gettime() shorthand equivalents.