On 2015/03/05 21:08, Etsuro Fujita wrote:
> Here is an updated version.
> The EXPLAIN output has also been improved as discussed in [1].
I noticed that the EXPLAIN for a pushed-down update (delete) on
inheritance childs doubly displays "Foreign Update" ("Foreign Delete"),
one for ForeignScan and the other for ModifyTable. Here is an example:
postgres=# explain verbose update parent set c1 = c1; QUERY PLAN
------------------------------------------------------------------------------ Update on public.parent
(cost=0.00..364.54rows=4819 width=10) Update on public.parent Foreign Update on public.ft1 Foreign Update on
public.ft2 -> Seq Scan on public.parent (cost=0.00..0.00 rows=1 width=10) Output: parent.c1, parent.ctid
-> Foreign Update on public.ft1 (cost=100.00..182.27 rows=2409
width=10) Remote SQL: UPDATE public.t1 SET c1 = c1 -> Foreign Update on public.ft2 (cost=100.00..182.27
rows=2409
width=10) Remote SQL: UPDATE public.t2 SET c1 = c1
(10 rows)
Should we do something? Suggestions are welcome.
Best regards,
Etsuro Fujita
[1] http://www.postgresql.org/message-id/31942.1410534785@sss.pgh.pa.us
