Re: About adding a new filed to a struct in primnodes.h
| От | Andy Fan |
|---|---|
| Тема | Re: About adding a new filed to a struct in primnodes.h |
| Дата | |
| Msg-id | CAKU4AWrFA5QGO+hbyh6F346BVQC7APLEd5+rzO57guaZE9e-7Q@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: About adding a new filed to a struct in primnodes.h (Alvaro Herrera <alvherre@alvh.no-ip.org>) |
| Ответы |
Re: About adding a new filed to a struct in primnodes.h
|
| Список | pgsql-hackers |
On Tue, Nov 24, 2020 at 11:11 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
On 2020-Nov-24, Andy Fan wrote:
> then we modified the copy/read/out functions for this node. In
> _readFuncExpr,
> we probably add something like
> [ ... ]
> Then we will get a compatible issue if we create a view with the node in
> the older version and access the view with the new binary.
When nodes are modified, you have to increment CATALOG_VERSION_NO which
makes the new code incompatible with a datadir previously created
Thank you Alvaro. I just think this issue can be avoided without causing
the incompatible issue. IIUC, after the new binary isn't compatible with
the datadir, the user has to dump/restore the whole database or use
pg_upgrade. It is kind of extra work.
-- for precisely this reason.
I probably didn't get the real point of this, sorry about that.
Best Regards
Andy Fan
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