Re: Avoid possible deference NULL pointer (src/backend/optimizer/path/allpaths.c)

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От Daniel Gustafsson
Тема Re: Avoid possible deference NULL pointer (src/backend/optimizer/path/allpaths.c)
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Msg-id E2392586-80AF-4FEE-8811-940F1F0DD194@yesql.se
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Ответы Re: Avoid possible deference NULL pointer (src/backend/optimizer/path/allpaths.c)
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> On 5 Jan 2025, at 00:29, Ranier Vilela <ranier.vf@gmail.com> wrote:
>
> Hi.
>
> Per Coverity.
>
> All call sites of function *get_cheapest_path_for_pathkeys* checks
> for NULL returns.
>
> So, it is highly likely that the function will return NULL.
>
> IMO, the Assert in this particular call, is not fully effective.
>
> Fix removing the Assert and always check if the return is NULL.

Yet the author wrote an Assert here (over a decade ago), so rather than blindly
changing that it seems reasonable to motivate a patch like this with an
investigation on what the Assert means here.  The fact that Coverity complains
is far from conclusive evidence that something is wrong.

--
Daniel Gustafsson




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