Terminating a backend

[Bruce Momjian <bruce(at)momjian(dot)us>]

I have an idea for this TODO item:

	* Allow administrators to safely terminate individual sessions either
	  via an SQL function or SIGTERM
	
	  Lock table corruption following SIGTERM of an individual backend
	  has been reported in 8.0.  A possible cause was fixed in 8.1, but
	  it is unknown whether other problems exist.  This item mostly
	  requires additional testing rather than of writing any new code.
	
	  http://archives.postgresql.org/pgsql-hackers/2006-08/msg00174.php

When we get the termination signal, why can't we just set a global
boolean, do a query cancel, and in the setjmp() code block check the
global and exit --- at that stage we know we have released all locks and
can exit cleanly.

-- 
  Bruce Momjian  <bruce(at)momjian(dot)us>        http://momjian.us
  EnterpriseDB                             http://postgres.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +