Re: Should we get rid of custom_variable_classes altogether?

On Sun, Oct 2, 2011 at 10:05 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> During the discussion of Alexey Klyukin's rewrite of ParseConfigFile,
> considerable unhappiness was expressed by various people about the
> complexity and relative uselessness of the custom_variable_classes GUC.
> While working over his patch just now, I've come around to the side that
> was saying that this variable isn't worth its keep.  We don't have any
> way to validate whether the second part of a qualified GUC name is
> correct, if its associated extension module isn't loaded, so how much
> point is there in validating the first part?  And the variable is
> certainly a pain in the rear both to DBAs and to the GUC code itself.
>
> So at this point I'd vote for just dropping it and always allowing
> custom (that is, qualified) GUC names to be set, whether the prefix
> corresponds to any loaded module or not.

Sounds sensible. One less thing to configure is a good thing.

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