Re: [PATCH] Compression dictionaries for JSONB

From: Nikita Malakhov <hukutoc(at)gmail(dot)com>
To: Aleksander Alekseev <aleksander(at)timescale(dot)com>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Jacob Champion <jchampion(at)timescale(dot)com>, Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Subject: Re: [PATCH] Compression dictionaries for JSONB
Date: 2023-04-27 10:43:59
Message-ID: CAN-LCVN9ahM40J7xg=M07giX4Q2x0AmjfVM3zJt+nG2mvOApOw@mail.gmail.com
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Hi,

I think I should open a new thread related to TOAST pointer refactoring
based on Pluggable TOAST, COPY and looping in retrieving new TOAST
value OID issues.

On Wed, Apr 26, 2023 at 4:00 PM Aleksander Alekseev <
aleksander(at)timescale(dot)com> wrote:

> Hi Nikita,
>
> > The External TOAST pointer is very limited to the amount of service data
> > it could keep, that's why we introduced the Custom TOAST pointers in the
> > Pluggable TOAST. But keep in mind that changing the TOAST pointer
> > structure requires a lot of quite heavy modifications in the core -
> along with
> > some obvious places like insert/update/delete datum there is very serious
> > issue with logical replication.
> > The Pluggable TOAST was rejected, but we have a lot of improvements
> > based on changing the TOAST pointer structure.
>
> Now I see what you meant [1]. I agree that we should focus on
> refactoring TOAST pointers first. So I suggest we continue discussing
> this in a corresponding thread and return to this one later.
>
> [1]:
> https://www.postgresql.org/message-id/CAJ7c6TPSvR2rKpoVX5TSXo_kMxXF%2B-SxLtrpPaMf907tX%3DnVCw%40mail.gmail.com
>
> --
> Best regards,
> Aleksander Alekseev
>

--
Regards,

--
Nikita Malakhov
Postgres Professional
The Russian Postgres Company
https://postgrespro.ru/

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