Josh Berkus writes:
It's one thing to day "we can't solve this covert channel issue right
now in this patch", but saying "we don't plan to solve it at all" is
likely to doom the patch.
I'm not sure what the solution would be, exactly. Deny permission for
EXPLAIN on certain tables?
That would close only one covert channel. Others were already pointed out
upthread, and I'll bet there are more ...

    regards, tom lane

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