Log Message:
-----------
Add some notes about why it's not a bug that RI_FKey_check calls
HeapTupleSatisfiesItself without doing LockBuffer first. This code
is a bit fragile, but AFAICS it's not actually broken.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
ri_triggers.c (r1.87 -> r1.88)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ri_triggers.c.diff?r1=1.87&r2=1.88)