Re: EvalPlanQual behaves oddly for FDW queries involving system columns

Hi Fujita-san,
I tried reproducing the issue with the steps summarised.
Here's my setup
postgres=# \d ft
Foreign table "public.ft"
Column | Type | Modifiers | FDW Options
--------+---------+-----------+-------------
a | integer | |
Server: loopback
FDW Options: (table_name 'lbt')

postgres=# \d lbt
Table "public.lbt"
Column | Type | Modifiers
--------+---------+-----------
a | integer |

The select (without for update) returns me two rows (one inserted in lbt
and one in ft), whereas in your description there is only one row. For me,
I am getting following error
postgres=# select ft.tableoid, ft.ctid, ft.* from lbt, ft where lbt.a = ft.a
for update;
ERROR: could not serialize access due to concurrent update
CONTEXT: Remote SQL command: SELECT a, ctid FROM public.lbt FOR UPDATE
postgres=#

after commit on terminal 1.

Am I missing something?
--
Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company