On 04/03/17 22:08, Bruce Momjian wrote:
> On Mon, Apr  3, 2017 at 09:53:34PM -0400, Chapman Flack wrote:
>> Hi,
>> Is there any distinctive state that could be checked by extension code
>> to determine that it has been loaded incidentally during the operation
>> of pg_upgrade rather than under normal conditions?
>> ... 
> You can check the backend global variable IsBinaryUpgrade to check if
> binary upgrade is being performed.  Does that help you?

That sounds like exactly what I'd hoped for. Thanks!


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