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(parent: f68220d) | patch

Fix LATERAL references to target table of UPDATE/DELETE.

Fix LATERAL references to target table of UPDATE/DELETE.

I failed to think much about UPDATE/DELETE when implementing LATERAL :-(.
The implemented behavior ended up being that subqueries in the FROM or
USING clause (respectively) could access the update/delete target table as
though it were a lateral reference; which seems fine if they said LATERAL,
but certainly ought to draw an error if they didn't. Fix it so you get a
suitable error when you omit LATERAL. Per report from Emre Hasegeli.

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