Marko -
I noticed something a little odd about the new append-plan handling.
rhaas=# explain update parent set c = 1;
QUERY PLAN
-----------------------------------------------------------------------
Update (cost=0.00..60.80 rows=4080 width=12)
-> Seq Scan on parent (cost=0.00..31.40 rows=2140 width=10)
-> Seq Scan on child parent (cost=0.00..29.40 rows=1940 width=14)
(3 rows)
That may be OK, actually, but it does look a little weird.
...Robert