RE: row filtering for logical replication

From: "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com>
To: Ajin Cherian <itsajin(at)gmail(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>
Cc: "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Greg Nancarrow <gregn4422(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Euler Taveira <euler(at)eulerto(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>, Amit Kapila <amit(dot)kapila16(at)gmail(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: 2021-11-16 08:33:42
Message-ID: OS0PR01MB61132C0E4FFEE73D34AE9823FB999@OS0PR01MB6113.jpnprd01.prod.outlook.com
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On Friday, November 12, 2021 6:20 PM Ajin Cherian <itsajin(at)gmail(dot)com> wrote:
>
> Attaching version 39-
>

I met another problem when filtering out with the operator '~'.
Data can't be replicated as expected.

For example:
-- publisher
create table t (a text primary key);
create publication pub for table t where (a ~ 'aaa');

-- subscriber
create table t (a text primary key);
create subscription sub connection 'port=5432' publication pub;

-- publisher
insert into t values ('aaaaab');
insert into t values ('aaaaabc');
postgres=# select * from t where (a ~ 'aaa');
a
---------
aaaaab
aaaaabc
(2 rows)

-- subscriber
postgres=# select * from t;
a
--------
aaaaab
(1 row)

The second record can’t be replicated.

By the way, when only applied 0001 patch, I couldn't reproduce this bug.
So, I think it was related to the later patches.

Regards
Tang

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