Re: 9.6, background worker processes, and PL/Java

From: Craig Ringer <craig(at)2ndquadrant(dot)com>
To: Chapman Flack <chap(at)anastigmatix(dot)net>
Cc: PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 9.6, background worker processes, and PL/Java
Date: 2016-10-26 11:42:47
Message-ID: CAMsr+YFUKZq9YQ8FcaKs-+Rc9kuvdh_qN-jH_=rMWNq3VvnGjQ@mail.gmail.com
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On 26 October 2016 at 06:56, Chapman Flack <chap(at)anastigmatix(dot)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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