Re: Extension Packaging

On Wed, May 11, 2011 at 5:06 PM, David E. Wheeler <david@kineticode.com> wrote:
> On Apr 28, 2011, at 2:16 PM, David E. Wheeler wrote:
>
>> So maybe it's half-assed. Maybe the version can be anything but the revision must be an integer. Maybe there's a
`pg_extension_version($extension_name)`function that returns ARRAY[$version, $revision], and the revision is set in the
controlfile but not included in the version or in the upgrade file names. I think I can live with that. But, hell,
you'rehalfway to mandating the meaning by doing this. Will we have to go the rest of the way in the future? 
>
> Okay, how we add a "revision" key to the control file and extrevision to the pg_extension catalog. Its type can be
"TEXT"and is optional for use by extensions. 
>
> This would allow extension authors to identify the base version of an extension but also the revision. And the core
doesn'thave to care how it works or if it's used, but it would allow users to know exactly what they have installed. 
>
> Thoughts?

How would pg_extension.extrevision be kept up to date?  AFAICS, the
whole point is that you might swap out the shared libraries without
doing anything at the SQL level.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company