Hi,
On 2017-02-20 11:44:58 +0100, Adam Dratwiński wrote:
> Hello everyone,
>
> I am writing a custom logical replication decoder, and I took test decoder
> from Postgres sources as an example.
>
> Could anyone tell me how to read "unchanged toast datum" in case it is
> VARTT_IS_EXTERNAL_ONDISK.
You can't by default. It's simply not available data - we'd have to log
a lot more data to make that fully available. If you change the replica
identity settings to FULL, the full old data (including toasted data)
will be logged.
Regards,
Andres