Josh Berkus <josh@agliodbs.com> writes:
>> BTW, has anyone thought through whether this is a sane idea at all?
>> It seems to me to be full of cases that will require rather arbitrary
>> decisions, like whether ON DELETE CASCADE should involve deleting the
>> whole row or just one array element.
> One array element, presumably.
Um, why? One reasonable interpretation of an array reference is that
the row depends on *all* of the referenced pkeys. Also, if you do
delete one array element at a time, what do you do when the array
becomes empty --- delete the row, or not, and in each case what's your
semantic justification for that choice?
In short, "presumably" doesn't cut it here.
regards, tom lane
