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Re: [PATCH] Fix Uninitialized scalar variable (UNINIT) (src/backend/access/heap/heapam_handler.c) - Mailing list pgsql-hackers

From Ranier Vilela
Subject Re: [PATCH] Fix Uninitialized scalar variable (UNINIT) (src/backend/access/heap/heapam_handler.c)
Date
Msg-id CAEudQAok09wvdn28eca+QBFA_WpeppbKL+Bt+19_15u+G5FEJw@mail.gmail.com
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In response to Re: [PATCH] Fix Uninitialized scalar variable (UNINIT) (src/backend/access/heap/heapam_handler.c)  (Ranier Vilela <ranier.vf@gmail.com>)
Responses Re: [PATCH] Fix Uninitialized scalar variable (UNINIT) (src/backend/access/heap/heapam_handler.c)  (Alvaro Herrera <alvherre@2ndquadrant.com>)
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Em ter., 25 de ago. de 2020 às 20:13, Alvaro Herrera <alvherre@2ndquadrant.com> escreveu:
On 2020-Aug-25, Ranier Vilela wrote:

> Em ter., 25 de ago. de 2020 às 19:45, Alvaro Herrera <
> alvherre@2ndquadrant.com> escreveu:
>
> > On 2020-Aug-25, Ranier Vilela wrote:
> >
> > > If the variable hscan->rs_cblock is InvalidBlockNumber the test can
> > > protect root_offsets fail.
> >
> > When does that happen?
>
> At first pass into the while loop?
> hscan->rs_cblock is InvalidBlockNumber, what happens?

No, it is set when the page is read.
And it is guaranteed that, rs_cblock is not InvalidBlockNumber when the page is read?

Ranier Vilela

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