Re: Restore CurrentUserId only if 'prevUser' is valid when aborttransaction - Mailing list pgsql-hackers

On Fri, Oct 12, 2018 at 02:28:36PM +0800, Richard Guo wrote:
> I think it is a better idea to avoid adjusting the state to TRANS_INPROGRESS
> from TRANS_START when aborting a transaction, as your patch does, since its
> only purpose is to suppress warning message.

Actually, as StartSubTransaction also switches to TRANS_START for a
savepoint, if there is an error until the state is switched to
TRANS_INPROGRESS then the code would fail to switch back to
CurrentUserId even if it is set, and it should be switched.  So that
solution is not correct either as AtSubStart_ResourceOwner() or such
could fail on memory allocation.  That's unlikely going to happen, but
it could.
--
Michael