Re: doc: Clarify that empty COMMENT string removes the comment

> On Mar 3, 2026, at 08:28, Fujii Masao <masao.fujii@gmail.com> wrote:
>
> On Tue, Mar 3, 2026 at 8:42 AM Chao Li <li.evan.chao@gmail.com> wrote:
>>
>>
>>
>>> On Feb 28, 2026, at 09:21, David G. Johnston <david.g.johnston@gmail.com> wrote:
>>>
>>> On Fri, Feb 27, 2026 at 5:12 PM Chao Li <li.evan.chao@gmail.com> wrote:
>>>
>>> PFA v3.
>
> Thanks for updating the patch! LGTM
>
> One more comment: the handling of empty-string comments exists in both
> CreateComments() and CreateSharedComments(). For better test coverage,
> how about adding also the regression test to check that COMMENT with
> empty-string works as expected for shared objects such as roles?
>

Sure. CreateSharedComments() handles database, tablespace and role, so as you suggested, I added tests for role in v4.

> From: zhangqiang <zhang_qiang81@163.com>
>
> Hi hackers,I have verified that using an empty string does indeed delete comments. I agree this patch content enables
usersto better understand how the database program handles empty strings when using the COMMENT ON command in
documentation,thereby improving the user experience.I think it's a good patch.  
>

Thanks for your review. Sounds good.

PFA v4:
 * Add tests that use NULL and ‘’ to remove comments from a role object.

Best regards
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/