Re: postgres_fdw: Use COPY to speed up batch inserts - Mailing list pgsql-hackers

On Thu, Oct 23, 2025 at 8:01 AM Matheus Alcantara
<matheusssilv97@gmail.com> wrote:
>
> Please see the attached v3 version that implements this idea.
>
hi.

I am not famailith with this module.
some of the foreach can be replaced with foreach_int.

I suspect that somewhere Form_pg_attribute.attisdropped is not handled properly.
the following setup will crash.

---source database
drop table batch_table1;
create table batch_table1(x int);

---foreign table database
drop foreign table if exists ftable1;
CREATE FOREIGN TABLE ftable1 ( x int ) SERVER loopback1 OPTIONS (
table_name 'batch_table1', batch_size '10' );
ALTER FOREIGN TABLE ftable1 DROP COLUMN x;
ALTER FOREIGN TABLE ftable1 add COLUMN x int;

INSERT INTO ftable SELECT * FROM generate_series(1, 10) i; --- this
will cause server crash.