Re:Re: Re: Change COPY ... ON_ERROR ignore to ON_ERROR ignore_row - Mailing list pgsql-hackers

At 2026-03-13 21:50:07, "Fujii Masao" <masao.fujii@gmail.com> wrote:
>On Fri, Mar 13, 2026 at 2:51 PM Yi Ding <dingyi_yale@163.com> wrote:
>> The new test added in v1 makes sense to me. A small suggestion is that to verify if a field is really null, we can do:
>>
>> ALTER FOREIGN TABLE agg_bad OPTIONS (ADD on_error 'set_null');
>> SELECT a, b IS NULL FROM agg_bad;
>
>Since the file_fdw test runs "\pset null _null_", a NULL value is displayed as
>"_null_". So you can verify that the value is NULL by checking whether
>"_null_" is shown.
>
>One could argue that this cannot be distinguished from the literal text value
>"_null_". However, relying on "\pset null _null_" is sufficient for this test,
>I think.
>
>Regards,
>
>-- 
>Fujii Masao
>

Sounds reasonable,that addressed my comment.

Regards,
Yi Ding