Re: support for CREATE MODULE

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Swaha Miller <swaha(dot)miller(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Nathan Bossart <nathandbossart(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: support for CREATE MODULE
Date: 2022-02-10 21:06:08
Message-ID: YgV+QPjjb8jhMzRG@momjian.us
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On Thu, Feb 10, 2022 at 08:53:15AM -0800, Swaha Miller wrote:
> On Fri, Feb 4, 2022 at 3:51 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Hm. If the functional requirement is "group objects without needing
> any out-in-the-filesystem infrastructure", then I could see defining
> a module as being exactly like an extension except there's no such
> infrastructure --- and hence no concept of versions, plus pg_dump
> needs to act differently.  That's probably enough semantic difference
> to justify using a separate word, even if we can share a lot of
> code infrastructure.
>
> Then as a first cut for modules, could we add CREATE MODULE
> syntax which adds an entry to pg_extension like CREATE EXTENSION
> does? And also add a new column to pg_extension to distinguish 
> modules from extensions. 
>
> The three-part path name resolution for functions would remain the 
> same, nothing would need to change there because of modules.
>
> Would that be an acceptable direction to go?

Well, that would allow us to have CREATE EXTENSION syntax, but what
would it do that CREATE SCHEMA does not?

--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com

If only the physical world exists, free will is an illusion.

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