ModifyTable, EXPLAIN ANALYZE and AFTER triggers

Hi,

The recent commit 09b49a8439fde63826f93f55430868cf2585644b claims:

+ Time spent firing triggers, if any, is charged to the Insert,
+ Update, or Delete node, and is also shown separately for each trigger.
+ Note, however, that deferred triggers will not be fired until end of
+ transaction and are thus not accounted for in the output of
+ <command>EXPLAIN ANALYZE</command>.

But that's only part of the truth; the ModifyTable nodes queue AFTER
triggers, but don't actually fire them. I remember there was some
discussion during 9.0's development about making the ModifyTable nodes
also count the time spent firing AFTER triggers, but I don't remember
what we decided back then. Meanwhile, I think this part in the
documentation needs a small clarification.

Regards,
Marko Tiikkaja