Re: Quick Extensions Question

On Mar 3, 2011, at 10:54 AM, Tom Lane wrote:

>> Which is why my suggestion is pretty much free from any design. Just a list of dependencies, with only a server
versionnumber. No other syntax at all. It can be added later. 
>
> I basically agree with Robert that "requires = 9.1" is entirely useless.
> There's next to no scenario where an extension author wouldn't really
> be wanting to write "requires >= 9.1" instead.  And to do that, we have
> to solve the whole version-number-comparison problem that we worked so
> hard to dodge before.  So this all looks to me like something that needs
> considerably more thought than we can devote to it for 9.1.

I'm saying that
   core_requires = 9.1.0, libxml, plpgsql

Means >= 9.1.0. That = is an assignment operator, not comparison. And this is the *only* version number I'd specify,
thecore version number, of which the core has perfect control of how things are compared (pg_version()). 

Best,

David