| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: PostgreSQL 12, JIT defaults |
| Date: | 2018-10-08 17:41:49 |
| Message-ID: | 28382.1539020509@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)anarazel(dot)de> writes:
>> I am thinking so simple number should be good enough. We can require
>> equality - Just I need a signal so some is wrong - better than Postgres
>> crash.
> It'd cause constant conflicts and / or we would regularly forget updating it. It's not that trivial to determine what influences ABI compatibility.
There already is a PG major-version-number check embedded in the
PG_MODULE_MAGIC infrastructure, which is plenty for regular users.
It's not sufficient for developers working with HEAD, of course.
We could consider making that work off of catversion instead, but I don't
think it'd really improve matters to do so. catversion doesn't cover most
of what can break loadable modules, such as changes of Node data
structures.
regards, tom lane
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