Andres Freund <andres(at)anarazel(dot)de> writes:
> Seems like we should just remove TransactionIdIsActive()?
+1. I wondered if any extensions might depend on it, but
could not find any trace of that in Debian code search.
And it's a sufficiently odd test (as noted in its comments)
that one could debate whether using it for an extension's
purposes would be correct anyway.
regards, tom lane