Re: Runtime SHAREDIR for testing CREATE EXTENSION

On Fri, Mar 2, 2012 at 1:53 PM, Daniel Farina <daniel(at)heroku(dot)com> wrote:
> On Fri, Mar 2, 2012 at 10:37 AM, Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
>> On tis, 2012-02-28 at 11:00 -0800, Daniel Farina wrote:
>>> I'd really like to support libraries (C or otherwise) of multiple
>>> versions at the same time, when the underlying library permits.
>>
>> What's preventing you from doing that now?  You need to name all the
>> symbols differently, of course.
>
> That's the problem: not really practical in a wider ecosystem of C
> libraries, especially if the library produces multiple versions.  (Or,
> not practical unless someone writes some credible
> symbol-version-mangling-magic)
>
> But is it unsurmountable? -- dlsym returns a function pointer, and one
> would build up the operator table for the version of the extension at
> hand, so one might have ltree "version 1.01" and ltree "version 2.3"
> fields in the same database.

That might be possible, but it seems largely unrelated to the topic of
this thread, unless I am missing something.

--
Robert Haas
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