public inbox for [email protected]  

help / color / mirror / Atom feed

From: Alvaro Herrera <[email protected]>
To: Amit Kapila <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: Rahila Syed <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Column Filtering in Logical Replication
Date: Thu, 6 Jan 2022 09:29:31 -0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAA4eK1JG9sg8FEx=gKVdtKNA6UpGzqkW0DEftcByP_DoSAHN4Q@mail.gmail.com>

On 2022-Jan-06, Amit Kapila wrote:

> Considering this, don't we need to deal with "For All Tables" and "For
> All Tables In Schema .." Publications in this query? The row filter
> patch deal with such cases. The row filter patch handles the NULL case
> via C code which makes the query relatively simpler.

Yes.  I realized after sending that email that the need to handle schema
publications would make a single query very difficult, so I ended up
splitting it again in two queries, which is what you see in the latest
version submitted.

> I am not sure if the same logic can be used here but having a simple
> query here have merit that if we want to use a single query to fetch
> both column and row filters then we should be able to enhance it
> without making it further complicated.

I have looked the row filter code a couple of times to make sure we're
somewhat compatible, but didn't look closely enough to see if we can
make the queries added by both patches into a single one.

> Shouldn't we try to have a behavior similar to the row filter patch
> for this case? The row filter patch behavior is as follows: "If your
> publication contains a partitioned table, the publication parameter
> publish_via_partition_root determines if it uses the partition row
> filter (if the parameter is false, the default) or the root
> partitioned table row filter. During initial tablesync, it doesn't do
> any special handling for partitions.

I'll have a look.

Thanks for looking!

-- 
Álvaro Herrera              Valdivia, Chile  —  https://www.EnterpriseDB.com/

view thread (2+ messages)

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected]
  Subject: Re: Column Filtering in Logical Replication
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox