0c051c9008
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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