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From: shveta malik <[email protected]>
To: Shlok Kyal <[email protected]>
Cc: Peter Smith <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Zhijie Hou (Fujitsu) <[email protected]>
Cc: vignesh C <[email protected]>
Cc: YeXiu <[email protected]>
Cc: Ian Lawrence Barwick <[email protected]>
Cc: Bharath Rupireddy <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: shveta malik <[email protected]>
Subject: Re: Skipping schema changes in publication
Date: Mon, 30 Jun 2025 16:25:18 +0530
Message-ID: <CAJpy0uAB+4nB5s2P0YdFAbNhOuB1UFFL5SyogDuGNedETA+d_w@mail.gmail.com> (raw)
In-Reply-To: <CAJpy0uDWRRgg9O8dmbBsS2Lu7SJMMOmsbfYNJG4R8saPVK-EQw@mail.gmail.com>
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	<CAHut+PsvC-NezO3MJkdyEz=G1QRje2LntjwhQiEeVbmhOQuBMA@mail.gmail.com>
	<CALDaNm18VH2j8cTqfELHQ=0ZNognbGBhbHPteJenWQC6C2dueQ@mail.gmail.com>
	<CALDaNm0k_0Ccj47wzJzzPFwgQB7w=R5+Q2_nSqYrmMmjhmcRUw@mail.gmail.com>
	<CAHut+Pv_0DwyWoGQNMF+G2AGqMuJTzWQKRtmxaC+=zLTPL-Zkw@mail.gmail.com>
	<CALDaNm2-GJt2HsYTkLqQ=ecm=R-vOBw1=aM_d2EiYbz39x_cTQ@mail.gmail.com>
	<TYCPR01MB8373C3120C2B3112001ED6F1EDCF9@TYCPR01MB8373.jpnprd01.prod.outlook.com>
	<CALDaNm0iZZDB300Dez_97S8G6_RW5QpQ8ef6X3wq8tyK-8wnXQ@mail.gmail.com>
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	<CALDaNm30KDnwX4Czi29fqLb8JBkuwqjbpj9ixwNXXox574NZqQ@mail.gmail.com>
	<CALDaNm1PfKRJsEzbKpyt=v4p3bw+_SzE+LFPsMhR5X+qs+0pPw@mail.gmail.com>
	<TYCPR01MB83730A2F1D6A5303E9C1416AEDD99@TYCPR01MB8373.jpnprd01.prod.outlook.com>
	<CALDaNm0sAU4s1KTLOEWv=rYo5dQK6uFTJn_0FKj3XG1Nv4D-qw@mail.gmail.com>
	<CALDaNm3CLRa95tpas6tEj8x58MUNDShxBNoYS+P8Uq5cryoAOw@mail.gmail.com>
	<CALDaNm0EKC3o=v+F7GneGibuCULGKkBWXmNaVB4GR9HoqD066A@mail.gmail.com>
	<CALDaNm1Z1Rmqj9s6P9ZzmrVA9F_vZ_DwwhYAJmsjqmY6dS3-hA@mail.gmail.com>
	<CAB8KJ=jJGuW=ozKmXZzKDUHZ_-J2ZYGOtJo=i2cnNbSu6=KuYg@mail.gmail.com>
	<CALDaNm1mbFP8fxHU_H1Ex4cT2Aq3n8FE79tq0TO5ThvFnDUYMA@mail.gmail.com>
	<CAB8KJ=jq4RwTs8K7pokmXQwQppP2ChVJLMSAdXaxAX+c1r+mdg@mail.gmail.com>
	<CALDaNm1mJvLni8GODebKBmyegXuZ18bLoG-Pz6H1MCX=vphCYA@mail.gmail.com>
	<CALDaNm3dWZCYDih55qTNAYsjCvYXMFv=46UsDWmfCnXMt3kPCg@mail.gmail.com>
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	<OS3PR01MB5718C8BE84B862E7E0CEC29B94BD2@OS3PR01MB5718.jpnprd01.prod.outlook.com>
	<CAA4eK1KYQz7cf46_D=6VkZ4J6Y8vJ88MMi=6zm2TJXDP+V1mLg@mail.gmail.com>
	<CANhcyEXZq4mP5dNgg7u=sMPwvxA4_ZN9U92uZEuzs=0xTu+8Yg@mail.gmail.com>
	<CANhcyEXspT3v5-Tdop9uqQV2HWBvZoN5P0BxXQ6Md6Mr7GXK9A@mail.gmail.com>
	<CAHut+PuiaLOCkiAx9nPnjk6wTbPFvnm9T5svTuKbgwJwTdea8w@mail.gmail.com>
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	<CANhcyEU9jX5wM0R3jHs5-=UFaFehcXC8KMkKow_rphHVben_Nw@mail.gmail.com>
	<CAJpy0uDWRRgg9O8dmbBsS2Lu7SJMMOmsbfYNJG4R8saPVK-EQw@mail.gmail.com>

Few more comments on 002:

5)
+GetAllTablesPublicationRelations(Oid pubid, bool pubviaroot)
 {

+ List    *exceptlist;
+
+ exceptlist = GetPublicationRelations(pubid, PUBLICATION_PART_ALL);


a) Here, we are assuming that the list provided by
GetPublicationRelations() will be except-tables list only, but there
is no validation of that.
b) We are using GetPublicationRelations() to get the relations which
are excluded from the publication. The name of function and comments
atop function are not in alignment with this usage.

Suggestion:
We can have a new GetPublicationExcludeRelations() function for the
concerned usage. The existing logic of GetPublicationRelations() can
be shifted to a new internal-logic function which will accept a
'except-flag' as well. Both GetPublicationRelations() and
GetPublicationExcludeRelations() can call that new function by passing
'except-flag' as false and true respectively. The new internal
function will validate 'prexcept' against that except-flag passed and
will return the results.

6)
Before your patch002, GetTopMostAncestorInPublication() was checking
pg_publication_rel and pg_publication_namespace to find out if the
table in the ancestor-list is part of a given particular. Both
pg_publication_rel and pg_publication_namespace did not have the entry
"for all tables" publications. That means
GetTopMostAncestorInPublication() was originally not checking whether
the given puboid is an "for all tables" publication to see if a rel
belongs to that particular pub or not. I

But now with the current change, we do check if pub is all-tables pub,
if so, return relid and mark ancestor_level (provided table is not
part of the except list).  IIUC, the result in 2 cases may be
different. Is that the intention? Let me know if my understanding is
wrong.

thanks
Shveta





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