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From: Chao Li <[email protected]>
To: Jim Jones <[email protected]>
Cc: Fujii Masao <[email protected]>
Cc: Matheus Alcantara <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: COMMENTS are not being copied in CREATE TABLE LIKE
Date: Fri, 13 Feb 2026 09:29:08 +0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<CAHGQGwF-uuKkon8Ah9dbMiGKoYmFJyHZnDa_HcWWCXKnh7LJ2Q@mail.gmail.com>
	<[email protected]>



> On Feb 12, 2026, at 23:33, Jim Jones <[email protected]> wrote:
> 
> 
> 
> On 12/02/2026 16:08, Fujii Masao wrote:
>> On Thu, Feb 12, 2026 at 11:36 PM Matheus Alcantara
>> <[email protected]> wrote:
>>> The patch fix the issue and it seems correct to me.
> 
> Thanks for the review!
> 
>> The documentation [1] states that INCLUDING COMMENTS copies comments for
>> the copied columns, constraints, and indexes. It does not mention copying
>> comments on the table itself. Therefore, not copying table comments with
>> INCLUDING COMMENTS does not appear to be a bug. That is, the proposed patch
>> seems more like an improvement than a bug fix.
> 
> Hmm, it seemed so obvious to me that I didn’t look more closely at the
> documentation :) Although I struggle to see the rationale for not
> copying a table’s comment in a CREATE TABLE LIKE ... INCLUDING COMMENTS
> statement, I have to agree that the documentation is quite clear about
> this limitation, and therefore it cannot really be considered a bug.
> That said, it may well be worth considering for a future release.
> 
> What are your thoughts?
> 
> Thanks!
> 
> Best, Jim
> 
> 

I feel the current behavior is proper. When you create a table using LIKE, you are cloning the structure, not the identity. Just as you have to pick a new name for the table, you should provide a new comment that fits its specific purpose. If a comment is needed, the COMMENT ON command is already the straightforward way to handle that.

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

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