| From: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Euler Taveira <euler(at)eulerto(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Rahila Syed <rahilasyed90(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, Önder Kalacı <onderkalaci(at)gmail(dot)com>, japin <japinli(at)hotmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, David Steele <david(at)pgmasters(dot)net>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: row filtering for logical replication |
| Date: | 2021-07-22 14:35:53 |
| Message-ID: | CAFiTN-th7fSa+8AqHp5K081tWwHj2HGbLxdC0=JtJ2bS7pQNqA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jul 22, 2021 at 5:15 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Tue, Jul 20, 2021 at 4:33 PM Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> >
> > On Tue, Jul 20, 2021 at 3:43 PM Tomas Vondra
> > <tomas(dot)vondra(at)enterprisedb(dot)com> wrote:
> > >
> > > Do we log the TOAST-ed values that were not updated?
> >
> > No, we don't, I have submitted a patch sometime back to fix that [1]
> >
>
> That patch seems to log WAL for key unchanged columns. What about if
> unchanged non-key columns? Do they get logged as part of the new tuple
> or is there some other way we can get those? If not, then we need to
> probably think of restricting filter clause in some way.
But what sort of restrictions? I mean we can not put based on data
type right that will be too restrictive, other option is only to allow
replica identity keys columns in the filter condition?
--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com
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