Re: Index (primary key) corrupt?

On Thu, Sep 18, 2025 at 10:58 AM Wim Rouquart <wim(dot)rouquart(at)kbc(dot)be> wrote:

> Hello,
>
>
> When doing a pg_dump of one of our databases one of the tables primary
> keys doesn’t get exported. Pg_dump just skips this index, without any
> warning whatsoever (verbose mode was used to doublecheck).
>
>
>
> When doing a REINDEX the issue is fixed.
>
>
>
> As this seems to me to be some form of index corruption, I tried using
> amcheck (bt_index_check and bt_index_parent_check) to verify for corruption
> but both resulted with no issues (the index is a btree).
>
>
>
> I would expect the corruption to show up when using amcheck, am I hitting
> some kind of bug here?
>

Does this problem keep happening, or has it only happened once?

> Are there any other ways to doublecheck for corruption (without enabling
> checksum upfront)?
>

pg_checksums is available in PG 15.

> This concerns a PostgreSQL version 15 btw.
>

Are you at the current patch level?

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