I wrote:
> ... So where I think we're going to end up
> is adding a clause along the line of "USING list-of-extension-names"
> to CREATE EXTENSION, storing those dependencies explicitly, and having
> the CREATE EXTENSION code set search_path to the target schema followed
> by the target schema(s) of the USING extensions.
On reflection, the set of extensions that an extension depends on is
obviously a property of the extension, which means it ought to be
specified in the extension's control file, not in the CREATE EXTENSION
command. So now I'm thinking something like
requires = 'foo, bar, baz'
in the file. We could even imagine autoloading such dependencies if
they're not already installed, but that's a frammish for later. (One
objection to autoloading is it's not clear which schema to drop the
other extensions into.)
regards, tom lane
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