Re: Would a BGW need shmem_access or database_connection toenumerate databases?

On Thu, Dec 14, 2017 at 06:12:35PM -0500, Chapman Flack wrote:
> On 12/04/2017 09:13 AM, Craig Ringer wrote:
> > On 1 December 2017 at 23:04, Chapman Flack <chap@anastigmatix.net> wrote:
> >> Can I call RegisterDynamicBackgroundWorker when not in the postmaster,
> >> but also not in a "regular backend", but rather another BGW?
> >>
> > Yes. BDR does it a lot.
> 
> Would this doc patch be acceptable to clarify that, in case
> I'm not the last person who might wonder?

Thanks, patch applied to head.

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> >From 3308ef5647e8ce4a84855b4d0cdddda09ba6aeb7 Mon Sep 17 00:00:00 2001
> From: Chapman Flack <chap@anastigmatix.net>
> Date: Thu, 14 Dec 2017 18:09:14 -0500
> Subject: [PATCH] Clarify that a BGW can register a dynamic BGW.
> 
> ---
>  doc/src/sgml/bgworker.sgml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/doc/src/sgml/bgworker.sgml b/doc/src/sgml/bgworker.sgml
> index 4bc2b69..e490bb8 100644
> --- a/doc/src/sgml/bgworker.sgml
> +++ b/doc/src/sgml/bgworker.sgml
> @@ -41,7 +41,7 @@
>    *worker, BackgroundWorkerHandle **handle</type>)</function>.  Unlike
>    <function>RegisterBackgroundWorker</function>, which can only be called from within
>    the postmaster, <function>RegisterDynamicBackgroundWorker</function> must be
> -  called from a regular backend.
> +  called from a regular backend, possibly another background worker.
>   </para>
>  
>   <para>
> -- 
> 1.8.3.1
> 


-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +