On Wed, May 11, 2011 at 10:48 PM, David E. Wheeler <da...@kineticode.com> wrote:
> On May 11, 2011, at 2:47 PM, Robert Haas wrote:
>
>>> 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't have 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.
>
> Bah! Okay, I give up. I'll not worry about it right now, as I have only one C 
> extension outside of core and it won't change much in the code. And I'll just 
> keep using the full version string (x.y.z) for the upgrade scripts. What I 
> won't do is change that version with every release, unless there is a code 
> change to demand it. The distribution version can increment independently.

What might work is to have the view call some function
pg_get_the_revision_from_the_control_file_or_some_other_place_in_the_filesystem('extension-name').

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

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