David J N Begley <d.begley@uws.edu.au> writes:
> My apologies for what may be an obvious answer to others but the documentation
> (for v8.1) leaves me concerned (enough not to trust "expected behaviour" of
> some commands).
You're confusing table-level locks with row-level locks. They are
entirely independent beasts. The names of the table-level lock modes
are rather unfortunately chosen, I think.
regards, tom lane