Re: SKIP LOCKED DATA (work in progress)

One thing I just noticed is that we uselessly set an error context
callback when "waiting" in ConditionalMultiXactIdWait, which is pretty
useless (because we don't actually wait there at all) -- we don't set
one in ConditionalXactLockTableWait, which makes sense, but for some
reason I failed to realize this in review of f88d4cfc9.  I think I will
take that out instead of cluttering this patch with it.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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