| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Sam Mason <sam(at)samason(dot)me(dot)uk> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: array_reverse() |
| Date: | 2009-11-02 15:03:49 |
| Message-ID: | 24699.1257174229@sss.pgh.pa.us |
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| Lists: | pgsql-general |
Sam Mason <sam(at)samason(dot)me(dot)uk> writes:
> On Mon, Nov 02, 2009 at 09:20:38AM -0500, Tom Lane wrote:
>> What would it mean for a multi-dimensional array?
> Rotating the array by 180 degrees in every dimension would give the same
> answer for 1-dimensional arrays and give sensible answers for higher
> dimensional arrays.
The easy implementation at the C level would be to reverse the storage
order of the elements (and then do something-or-other with the dimension
info, in case the array isn't square). Your diagram suggests that this
might be the same thing as what you suggest, but I can't work it out for
lack of caffeine.
regards, tom lane
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