Re: ARRNELEMS Out-of-bounds possible errors

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От Kyotaro Horiguchi
Тема Re: ARRNELEMS Out-of-bounds possible errors
Дата
Msg-id 20221223.173755.439875412892422008.horikyota.ntt@gmail.com
обсуждение исходный текст
Ответ на ARRNELEMS Out-of-bounds possible errors  (Ranier Vilela <ranier.vf@gmail.com>)
Ответы Re: ARRNELEMS Out-of-bounds possible errors  (Kyotaro Horiguchi <horikyota.ntt@gmail.com>)
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At Thu, 22 Dec 2022 12:35:58 -0300, Ranier Vilela <ranier.vf@gmail.com> wrote in 
> Hi.
> 
> Per Coverity.
> 
> The commit ccff2d2
> <https://github.com/postgres/postgres/commit/ccff2d20ed9622815df2a7deffce8a7b14830965>,
> changed the behavior function ArrayGetNItems,
> with the introduction of the function ArrayGetNItemsSafe.
> 
> Now ArrayGetNItems may return -1, according to the comment.
> " instead of throwing an exception. -1 is returned after an error."

If I'm reading the code correctly, it's the definition of
ArrayGetNItems*Safe*. ArrayGetNItems() calls that function with a NULL
escontext and the NULL turns ereturn() into ereport(). That doesn't
seem to be changed by the commit.

Of course teaching Coverity not to issue the false warnings would be
another actual issue that we should do, maybe.

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center



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