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doc: clarify "pg_signal_backend" default role

Ian Barwick <ian.barwick@2ndquadrant.com>

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From: Ian Barwick <ian.barwick@2ndquadrant.com>
To: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Cc: pgsql-docs <pgsql-docs@postgresql.org>
Date: 2019-06-10T02:06:54Z
Lists: pgsql-hackers, pgsql-docs

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Hi

Currently the documentation for the default role "pg_signal_backend" states,
somewhat ambiguously, "Send signals to other backends (eg: cancel query, terminate)",
giving the impression other signals (e.g. SIGHUP) can be sent too, which is
currently not the case.

Attached patch clarifies this, adds a descriptive paragraph (similar to what
the other default roles have) and a link to the "Server Signaling Functions"
section.

Patch applies cleanly to HEAD and REL_11_STABLE.


Regards

Ian Barwick


-- 
  Ian Barwick                   https://www.2ndQuadrant.com/
  PostgreSQL Development, 24x7 Support, Training & Services

Commits

  1. Doc: improve documentation of pg_signal_backend default role.