On 26 October 2016 at 06:56, Chapman Flack <c...@anastigmatix.net> wrote:

> My main question is, what state do I need to examine at startup
> in order to distinguish these cases?

For loaded in shared_preload_libraries, test

IsPostmasterEnvironment && !IsUnderPostmaster

See src/backend/utils/init/globals.c

> Do I detect I'm in a BGW by
> a non-null MyBgworkerEntry?

Use IsBackgroundWorker, same place as above.


-- 
 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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