Re: Possible marginally-incompatible change to array subscripting

On 12/22/2015 10:01 AM, Robert Haas wrote:
> On Tue, Dec 22, 2015 at 12:55 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>>> On Tue, Dec 22, 2015 at 11:51 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>>> ISTM that if we'd had Yury's code in there from the beginning, what we
>>>> would define this as meaning is "a[3:4][:5]", ie the implied range runs
>>>> from whatever the array lower bound is up to the specified subscript.
>>
>>> Gosh, our arrays are strange. I would have expected a[3:4][5] to mean
>>> a[3:4][5:5].
>>
>> Yeah, probably, now that you mention it ... but that seems like too much
>> of a compatibility break. Or does anyone want to argue for just doing
>> that and never mind the compatibility issues? This is a pretty weird
>> corner case already; there can't be very many people relying on it.
>
> To be honest, I'd be inclined not to change the semantics at all. But
> that's just me.
>

I think a sane approach is better than a safe approach.

JD

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