| From: | Peter Smith <smithpb2250(at)gmail(dot)com> |
|---|---|
| To: | Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com> |
| Cc: | vignesh C <vignesh21(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, YeXiu <1518981153(at)qq(dot)com>, Ian Lawrence Barwick <barwick(at)gmail(dot)com>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Skipping schema changes in publication |
| Date: | 2025-11-07 06:06:04 |
| Message-ID: | CAHut+Pv96u0VciuSx2B99jDHEvn7svVJynCmw-qYb=z4Kc2knA@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi Shlok.
Some questions for the patch v25-0002 (EXCEPT tables)
======
doc/src/sgml/ref/alter_publication.sgml
1.
+ALTER PUBLICATION <replaceable class="parameter">name</replaceable>
ADD ALL TABLES [ EXCEPT [ TABLE ] ( <replaceable
class="parameter">exception_object</replaceable> [, ... ] ) ]
You can do both ADD/SET the <publication_object>, so really there
should be an ADD/SET ALL TABLES command as well, right?
~~~
2.
What was your reason for changing the syntax?
AFAICT those added "( )" are not strictly necessary, so I just
wondered your reason.
For example, we do not have any "( )" for <publication_object> [,...].
It is: ALTER PUBLICATION name ADD publication_object [, ...]
Not: ALTER PUBLICATION name ADD (publication_object [, ...])
So in the same way we could have EXCEPT syntax like that:
ALTER PUBLICATION name ADD ALL TABLES [EXCEPT <table_exception_object> [, ...]]
Where table_exception_object is: [ TABLE ] [ ONLY ] table_name [ * ]
Currently, if the user just wants to exclude a single table they must do:
ALTER PUBLICATION name ADD ALL TABLES EXCEPT (t1);
instead of just ALTER PUBLICATION name ADD ALL TABLES EXCEPT t1;
~~~
3.
BTW, I think you may need to consider a <table_exception_object>
instead of a generic name like <exception_object>, because in the
future if we EXCEPT SEQUENCES the <exception_object> name may be not
appropriate because things like [ONLY] and [*] are not applicable for
sequences.
======
Kind Regards,
Peter Smith.
Fujitsu Australia
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