Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> Here, that doesn't seem too likely. You could have a column that
> contains 'tom' and ['tom'] and [['tom']] and [[['tom']]] and so forth
> and they all get mapped onto the same bucket and you're sad. But
> probably not.
Yeah, that might be a more useful way to think about it: is this likely
to cause performance-critical collisions in practice? I agree that
that doesn't seem like a very likely situation, even given that you
might be using json for erratically-structured data.
regards, tom lane