Log Message:
-----------
Fix overly-strict sanity check in BeginInternalSubTransaction that made it
fail when used in a deferred trigger. Bug goes back to 8.0; no doubt the
reason it hadn't been noticed is that we've been discouraging use of
user-defined constraint triggers. Per report from Frank van Vugt.
Modified Files:
--------------
pgsql/src/backend/access/transam:
xact.c (r1.243 -> r1.244)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xact.c.diff?r1=1.243&r2=1.244)