Re: DatumGetInetP buggy

2011-11-08 18:53 keltezéssel, Heikki Linnakangas írta:
> On 08.11.2011 17:06, Tom Lane wrote:
>> Heikki Linnakangas<heikki.linnakangas@enterprisedb.com>  writes:
>>> Hmm, it seems to be intentional, but I agree it's very much contrary to
>>> the usual convention that DatumGetXXXP() returns a detoasted and
>>> depacked datum. I think we should change it. I propose the attached
>>> patch. It changes DatumGetInetP() to do PG_DETOAST_DATUM(), and adds new
>>> DatumGetInetPP() macro to return the packed version. I also moved the
>>> access macros like ip_family() from network.c to inet.h, so that they're
>>> available for whoever wants to look at the fields without having to depack.
>>
>> No objection to making the DatumGet macro names conform to common
>> convention, but I'm not thrilled with moving those special-purpose
>> accessor macros into wider circulation.  It's not necessary and the
>> macros don't work unless used in a particular way per the comment,
>> so I don't think they can be considered general purpose.
>
> Ok.
>
> What do people think of backpatching this? I'm inclined to backpatch, on the grounds
> that the macro that detoasts and depacks should always work (ie. after this patch), even
> if the depacking isn't necessary and introduces an extra palloc+copy, but the reverse is
> not true.

On the grounds that 9.0.x also shows the problem with
the stock macro, backporting would be nice. I don't know
which older trees may show the problem, I only tested with
9.0 and 9.1.

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