On Wed, Jun 25, 2025 at 11:04 PM Fujii Masao
<masao.fu...@oss.nttdata.com> wrote:
> >>
> >> This commit corrects the behavior by ensuring CREATE TABLE LIKE to also 
> >> copy
> >> the comments on NOT NULL constraints when INCLUDING COMMENTS is specified.
> >
> > LGTM.  I'd add a line in the test showing that these comments are copied
> > even if INCLUDING CONSTRAINTS is not given,
>
> +1 to adding that test.
>
>   CREATE TABLE ctlt1_inh (LIKE ctlt1 INCLUDING CONSTRAINTS INCLUDING 
> COMMENTS) INHERITS (ctlt1);
>   \d+ ctlt1_inh
> -SELECT description FROM pg_description, pg_constraint c WHERE classoid = 
> 'pg_constraint'::regclass AND objoid = c.oid AND c.conrelid = 
> 'ctlt1_inh'::regclass;
> +SELECT conname, description FROM pg_description, pg_constraint c WHERE 
> classoid = 'pg_constraint'::regclass AND objoid = c.oid AND c.conrelid = 
> 'ctlt1_inh'::regclass ORDER BY conname COLLATE "C";
>
> However, since ctlt1_inh is created with INCLUDING COMMENTS, this test
> doesn't seem to demonstrate the case you mentioned — that comments on
> not-null constraints are copied even without INCLUDING CONSTRAINTS.
> Am I misunderstanding?

to do that,
we can create another table in create_table_like.sql:
CREATE TABLE noinh_con_copy2 (LIKE noinh_con_copy INCLUDING COMMENTS);

or change noinh_con_copy1 definition to
CREATE TABLE noinh_con_copy1 (LIKE noinh_con_copy INCLUDING COMMENTS);


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