OK, I will remove the new TODO item.
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > I think that was me, long ago.
>
> IIRC, BETWEEN is not the only construct that generates multiply-linked
> subtrees, so you don't need to take the whole blame ;-)
>
> The copyObject solution has the advantage of being fairly robust,
> whereas trying to ban such things in the parser's output would not be.
>
> regards, tom lane
>
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