http://www.slony.info/bugzilla/show_bug.cgi?id=302

--- Comment #1 from Christopher Browne <cbbrowne at ca.afilias.info> 2013-07-24 12:19:23 PDT ---
There appears to be a need to do the FOR UPDATE, in that this was introduced to
prevent deadlocks that can occur due to needing to escalate locks on such
tables.

A thought is to "hide" this query inside a security definer function, so that
the permission could be granted to a more ordinary user.  That seems a bit
thorny, requires more thought.

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