Bruce Momjian <bruce(at)momjian(dot)us> writes:
> Tom Lane wrote:
>> Bruce Momjian <bruce(at)momjian(dot)us> writes:
>>> + Exclusion constraints ensure that if any two rows are compared on
>>> + the specified columns or expressions using the specified operators,
>>> + at least one of these operator comparisons will be false. The syntax is:
>>
>> Isn't that phrasing outright incorrect? Consider nulls.
> Well, doesn't a comparison returning null really behave as false?
> Should I reword it as "not true" or "false or null"?
Either one.
regards, tom lane