Re: prevent immature WAL streaming

Hi,

On 2021-09-01 15:01:43 +0900, Fujii Masao wrote:
> Thanks for clarifying that! Unless I misunderstand that, when recovery ends
> at a partially-flushed segment-spanning record, it sets
> XLP_FIRST_IS_ABORTED_PARTIAL in the next segment before starting writing
> new WAL data there. Therefore XLP_FIRST_IS_CONTRECORD or
> XLP_FIRST_IS_ABORTED_PARTIAL must be set in the next segment following
> a partially-flushed segment-spanning record. If none of them is set,
> the validation code in recovery should report an error.

Right. With the small addition that I think we shouldn't just do this for
segment spanning records, but for all records spanning pages.

Greetings,

Andres Freund