public inbox for [email protected]  
help / color / mirror / Atom feed
From: Peter Smith <[email protected]>
To: shveta malik <[email protected]>
Cc: vignesh C <[email protected]>
Cc: Nisha Moond <[email protected]>
Cc: Dilip Kumar <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Masahiko Sawada <[email protected]>
Cc: Bharath Rupireddy <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: shveta malik <[email protected]>
Subject: Re: Proposal: Conflict log history table for Logical Replication
Date: Wed, 27 May 2026 08:50:23 +1000
Message-ID: <CAHut+Ptaf=2p4c33jsuz9nJY4=TtfZzFkermAeL5q=krOjMYEw@mail.gmail.com> (raw)
In-Reply-To: <CAJpy0uDzEW7hmUXHyApUx-7D10wvw8gJiRjHxkuRU+QOdAeMaA@mail.gmail.com>
References: <CAFiTN-u5D5o_AGNbHRZHaOqAMWkxLf+hSk_r9X3gv6HbLOB5+g@mail.gmail.com>
	<CALj2ACViThGQDYi-yeqUeHqG2Pozn2AiyvtDtjE6zhhbM0KsEA@mail.gmail.com>
	<CAA4eK1+44b3vd_OWfiaVNtjf5Njb5cek09pmKRmttBByeg0NoA@mail.gmail.com>
	<CAFiTN-v3L0WacCDx5dkOSonaZQbJfstXL4HrCPD1ahRdUsRnSg@mail.gmail.com>
	<CALj2ACW63uuxh0fSoxEAF8OMWhz1dJKSkp268WJDzf5BUqCf5g@mail.gmail.com>
	<CAFiTN-s9WWLOhW1TO27NtJwGf0bh2+MWyp3NEkZFeN_S5_p_rA@mail.gmail.com>
	<CAA4eK1LxnsEx5sMbQkK5MHAgXKPROMQXQ0n=fKMwz+UsfKQaMQ@mail.gmail.com>
	<CAD21AoDj+c4LXf2y4ESR-gVyv9d8V0G4R8R9pn-PcmT5zPzYcg@mail.gmail.com>
	<CAA4eK1KokmAwNOL6bS-ip_E3F96PiQTjC4j-M+5vD1T6uUyi3Q@mail.gmail.com>
	<CAFiTN-vFKE8E_N6h+peX9DP92mxCeFdm5A9Esn4DkLmNcZ-dOA@mail.gmail.com>
	<CAFiTN-shLYf-fOTQ_dBf3Xfx05gxs_8d93MHZXyyz6w2Bg5geQ@mail.gmail.com>
	<CAFiTN-tEgkKQHUikn6iBFCYf7XOObR7ncUq=OVh7WEk=6P4ymw@mail.gmail.com>
	<CAFiTN-tQiakd8m+-d6WN6RpJXSv_JcropZ2oGzme4d1JudQhYg@mail.gmail.com>
	<CAJpy0uDKbYWt+YPADj=4fHEvrGEWgnG1n_YsiGT_EZiZf0VSAw@mail.gmail.com>
	<CAFiTN-t82BiXen+HfdR9jZyOpuSO92xonnUK=khXsiZWBfOxMA@mail.gmail.com>
	<CAJpy0uAu2paxGAEffD=vaBTW9Jqbtxxawb8K8FgiASfeKPnGog@mail.gmail.com>
	<CAJpy0uC0ZWgHOivJ102A1fMkppwK3RuSMafRPKyjwkmJrjhVUw@mail.gmail.com>
	<CAFiTN-vFV9-zajrwjYHYyFnyQsooOAXW4CpxB5f-iT3APjOtoQ@mail.gmail.com>
	<CAJpy0uBeU1dZgaqsSVKc=P=EVUKxRgVuHR8jDXFL-HLibbE-kQ@mail.gmail.com>
	<CAA4eK1+FOkOxhzVLAnDymoNjp4i98H-L1+ZsWDgJEv-ndnTzTA@mail.gmail.com>
	<CAFiTN-sVK6Bp+BawCJU_WpAXQSTX4OkKmce5EE4YNBgD-XSjZw@mail.gmail.com>
	<CAA4eK1LbjV0bctib9wUnBpEkC+2rZFPnGuRtrKuc5AtUAzum+A@mail.gmail.com>
	<CAFiTN-vq50N3QP9p3_SH+tJ8Pn=uRDb0X4qEcQZYcGW9AX88rQ@mail.gmail.com>
	<CAFiTN-u3+zRGPESP5kUUfa6NxaWh1HL-gd1225KJ0Uvzi1urow@mail.gmail.com>
	<CAA4eK1L4iNk6mNTC83PbYrRfUdtivH4U961PkdFfOO7mvc=USg@mail.gmail.com>
	<CAFiTN-v+Mh64UfR5zb5rwgyGm6HS80XRSZ_XeaWkg8=+s9o3Kg@mail.gmail.com>
	<CAFiTN-s3ZFHteQsiC3H4=AjTWxuwN-w69XQ3xL5X6YOMTua4pA@mail.gmail.com>
	<CAJpy0uDe724nY59j-8hMapZ_Fru1Wo-NucF4Ea1B3Jrw=+J+UQ@mail.gmail.com>
	<CAFiTN-uR=86L_5tyiA7n73EXCSCuDfQKfL5O=c8n7zZom8_ONQ@mail.gmail.com>
	<CAD21AoDfOS-J0M9WbM3D20eGbSPzbfLQ-9XoYkxO4AZ9twqyvg@mail.gmail.com>
	<CAFiTN-vMTg2X7vwfHLr5Gvy8ViV63_iaEcpHmM8V5GpA9-u8cg@mail.gmail.com>
	<CAA4eK1+b2Ws0e_ZYJsgZAPn7VWndxAK_YM_QMKcfXst3e7F6Jg@mail.gmail.com>
	<CAFiTN-v6hFKMPrSyTBsz=AtEETYMbOxrqvhZJsPQqKgQc4WCLw@mail.gmail.com>
	<CAA4eK1KV3rYkaxys5fh-PtE9kq5xrFbiaRpOSPoRgQG494ek+g@mail.gmail.com>
	<CAFiTN-utvu=QjY1QQ1a_TvkpkpvesMWo9M8wTFYLaOTPdpOJvw@mail.gmail.com>
	<CAA4eK1+HoSOEqNwT3twArPNx4_D7hSUoEg2LnYhX8n9iUwhXgQ@mail.gmail.com>
	<CAFiTN-tqmsfW0Sk=1RhzuduxqLrf9KEc8VOvBae+4aYxWTJwuA@mail.gmail.com>
	<CAA4eK1JmCQ=DHe3HsqpX+P3mGDUd_Z7E7oAxdstK6822W6tuCw@mail.gmail.com>
	<CAFiTN-uE4eAUYewuq3c5deAt3TtVork+H6rkUHRv68cOGr5rmQ@mail.gmail.com>
	<CAFiTN-sJbhPX+LbA8YuQeYJpfGA2XA+OKXf8jCm04RoJOyzLvw@mail.gmail.com>
	<CAJpy0uBPOyWj9itFjHzGXfrUuYS8KGmAvgdcV_9FPjWZ0EZz_w@mail.gmail.com>
	<CAFiTN-s=iLE4qM4qmw9yXKqW09R_c_HqaSGeZXJ2EaTVfXss+g@mail.gmail.com>
	<CAA4eK1KYo0vZpPSRc_4gVpa06-J39gxjs3tHFyckgkBfYJSfFA@mail.gmail.com>
	<CAFiTN-vrKc6OWzrg6yvpwYcj79k=zkrDp3uwiZzjwrWLJAq6tw@mail.gmail.com>
	<CAA4eK1LmvrfEgn1NUZZ=E3yMCjQdNZ5=_SBEry73-EmF6jM_PQ@mail.gmail.com>
	<CAFiTN-vjfub5b3PqPQzfOw9BSjm8jt28ott+Hoz9CrRxJHzYkg@mail.gmail.com>
	<CAFiTN-v=ANapYvRK+SOy2wJb4CSuD6Vb6_bTGuReM9Dv+3tucA@mail.gmail.com>
	<CALDaNm1zEYoSdf2Ns-=UJRw95E5sbfpB0oaNUWtRJN27Q1Knhw@mail.gmail.com>
	<CALDaNm3USsXVNBsfdpkp60HVgrTV4taWMk1xZYNBa7QUF=V0jg@mail.gmail.com>
	<CAFiTN-sNg9ghLNkB2Kn0SwBGOub9acc99XZZU_d5NAcyW-yrEg@mail.gmail.com>
	<CAJpy0uAF3EYcYdpTHdKMeXfvaPbNvnWrZUATrSLL1hqjao=33A@mail.gmail.com>
	<CAFiTN-uikggCKp2LscTorKY5d3KF9j93DW0xebDcRX86G+ZsSw@mail.gmail.com>
	<CAJpy0uDaOoVK8S3_xxTAcTDpfK1AY7tApw7nPOZG_gUz+DMi=Q@mail.gmail.com>
	<CAA4eK1+AdeC5B9xrAXSKWGtTh-0d8xdD=fZttmOBm+c8o8thAQ@mail.gmail.com>
	<CAFiTN-skBQAeuzuUd+PDK0Gqc8g+4x9ypBMwJhOrmW8ZCFKGSA@mail.gmail.com>
	<CAJpy0uCdrsW5T+okq7xTOVxagje7FW3DOeY5B0CGKYa5VqF_tQ@mail.gmail.com>
	<CAFiTN-u+_mFj9caYYFO7=_YHFXk5y=vvOm2H2=5hctYktmAVGA@mail.gmail.com>
	<CALDaNm1aivk9KgQ5daeF6YZzuE+0wWc2yb7wb6qikNyvfPN0Sg@mail.gmail.com>
	<CAJpy0uD6fTEUYJx3+yDbvB=VW7c5AaGoeSd7iwHdYYO=kYGn3g@mail.gmail.com>
	<CALDaNm2YOOdJ25X1sJ+DYz37K6Qi4g0ZNFHb_pQMF9UqancnEA@mail.gmail.com>
	<CAHut+PtMS5bENS0DVtBj+s3kUEOq61+hSkqLODjFB78egB0imQ@mail.gmail.com>
	<CAFiTN-s_M83sfs+MHHbUrMesjsCPN4JWxY5MChCEiY1U-u7=9g@mail.gmail.com>
	<CAFiTN-vj8NTm9w_L2XdhxJCub_RZw__YVUgfXa1B1kJzJctRNw@mail.gmail.com>
	<CAJpy0uBDLnfhuSiev8W9ZMFNTzUmqhds2dKayUpLoN-z1dtsLA@mail.gmail.com>
	<CAFiTN-uL9f0X+=Ep4BbAPvaTJA7S4XHM--G4BsnPJw4uJW7EGQ@mail.gmail.com>
	<CAJpy0uDG=t-y_m8t1zpBzfz9viP3K8dyQgkruaraVT85UtTkrg@mail.gmail.com>
	<CAFiTN-tR8Rhs8uhfbck0Ac4dd1MopvvYgjK39nWyNXRp9Z3Qww@mail.gmail.com>
	<CAA4eK1Kf15UpNmpTTE2XyX=9PE_oTpOoy5xqg3rFWbxwwP4Rbg@mail.gmail.com>
	<CAFiTN-tNqb0vjuadDz-as67ksSXa=aEK+JW=4b54RVmkUK1m2Q@mail.gmail.com>
	<CAFiTN-vDCxx6ydUFo59L8qNBbierg4as3TGPPiavR7UZjYurzA@mail.gmail.com>
	<CAHut+PsWms218ENALnytLEV4NpxjOrAYhChLDaMaeE65-vNgrQ@mail.gmail.com>
	<CAFiTN-v9i9RmDvdUmtMUow4=b+nr0k7LKMyEQ+6ZF=EVdfBhBA@mail.gmail.com>
	<CALDaNm2YTKwPDjt9OV49RgM0zbkWhMhNu228bj_7f+zzcPb-ew@mail.gmail.com>
	<CAFiTN-t_4XvofM3an-WmykqnPE+9wf9U+o2M7p1CWd9eXkN88Q@mail.gmail.com>
	<CAHut+PuaqNDfDu_3xkZR4OYxw-B7ew_WjpLXCBvMcSBJz2K6Xg@mail.gmail.com>
	<CAFiTN-uqNN9S_hRuda_th5MEpywa15g+XO00yM6tNJ-spGRRJw@mail.gmail.com>
	<CABdArM6QxXatkGefTHy__HgaYHBvbKesffeXzT8Vn-kvcvGK4w@mail.gmail.com>
	<CAFiTN-tgMWr=TGPhs9BxaPuSC_jhM7sJJ4fHedE5W6=h40jLfA@mail.gmail.com>
	<CABdArM5fgzfyC2mH3YGB8t8cJBHWqAG1BS6rJMk7mX-8=9d=Cg@mail.gmail.com>
	<CABdArM568KF4WXdFX_aZkCiDK8R71Wpep0gC2a+cV8BMobwkrg@mail.gmail.com>
	<CAFiTN-vQ0tu18BD3UmKPb0rzZyFMQAVgGbdpMA8iYLX7PZOqOA@mail.gmail.com>
	<CALDaNm20PDtmG2E3qaTC+YuL5twv+c9k573wL3sb=OwgmZphxQ@mail.gmail.com>
	<CAA4eK1LhOHa_TEznw+gFoq+w0vMvvsDG2g9Xq8Mwa8xZMY73og@mail.gmail.com>
	<CAFiTN-vPDqrQ2rHykNgd+groFxqwBYFQF97R-Co2EmtUkV6MTg@mail.gmail.com>
	<CAFiTN-vsd=wNiEPXPQhZnipAb--+mBUC01M-pcjBjbRockgCUA@mail.gmail.com>
	<CAJpy0uCjSq_gUCJBfURhqtB6bLvkKSUL-sVXpaGKjEapv5+t+Q@mail.gmail.com>
	<CAFiTN-uZ-LaStAY3NuCY-nb7GCB9joiHX7HtHEMseJ0xfnqVSg@mail.gmail.com>
	<CAFiTN-vhJxRW5NQ628oidnk0KtHwKt11dW9-+vxqpXLTgjiYiA@mail.gmail.com>
	<CALDaNm1cJURibYKY4+DuNosjM72C9oGheUF-roMyff__+AsKBw@mail.gmail.com>
	<CAJpy0uD1_77TDAFc4jE-94X-WUus7Q3gGU0pXfC+Tticq1hFvA@mail.gmail.com>
	<CAA4eK1LFcSc4XCj4mU-cv27F_6n6=+ehJ=YAsAnyBbz4Sv_tVg@mail.gmail.com>
	<CAFiTN-s5ZtjXKrSbam7TNWJ9Ax-kCancXcestAnx2by7dK0-UA@mail.gmail.com>
	<CAFiTN-u=Da32mXyz8jocEGtuLSG4ccXXj_aEzUTPp2zkLb3MVA@mail.gmail.com>
	<CALDaNm1qY5e0thfsDB2uWXqZn4hgTWTxiUDwcF1hWA-jodsKYg@mail.gmail.com>
	<CALDaNm1nFtv3dtdRdbqWo2Rf_av7XbxDfK1Orqjcqs_Su_cLRQ@mail.gmail.com>
	<CABdArM7R498qC5Fr42aU_q-2Sc5QsT4dyKgmO_f6Uy=8oCAFXA@mail.gmail.com>
	<CAFiTN-sRZ+Z_9B3ue2L4zkbcfmPjjcAjcR1C+px1PyAs+HGsSg@mail.gmail.com>
	<CAFiTN-sdcjf9xJ2M-=ab5e4y662tTmFFiP4gHL44tC9PcQozcw@mail.gmail.com>
	<CALDaNm2WNjaNxUijVkvT6y69D62rfCu8OMwU-Pf-84un2r_=ig@mail.gmail.com>
	<CAHut+PvEP5uUR13xJ3gbNKGU49=Rg32DXMGZ2wL9jTcKHyN_=Q@mail.gmail.com>
	<CALDaNm3Jb5AQTsFJFxYZZJCaheT7qToCZkEALfW-vsMMFxjOyQ@mail.gmail.com>
	<CAHut+PtQn5U9i00qvBmjo0KBxyb+ZmBb38NzF91KnX4J86Jg_g@mail.gmail.com>
	<CALDaNm1a1gzy0L38U394_4OFwGUS8ALgSONYj++VLimY0g9piQ@mail.gmail.com>
	<CABdArM5X63AdtS99QKGjVijUd_Q_dV8QUDSo4nTHKJjn3JwtAg@mail.gmail.com>
	<CABdArM499reV5BnwJqQshDOjy0ERQMYJqecsJU6uzhbRScn2WA@mail.gmail.com>
	<CALDaNm0mSLV3R2eNgCvfJ4i6pbFnDwFUGM=Zrikh61XtaR9PSw@mail.gmail.com>
	<CAJpy0uDzEW7hmUXHyApUx-7D10wvw8gJiRjHxkuRU+QOdAeMaA@mail.gmail.com>

On Tue, May 26, 2026 at 7:38 PM shveta malik <[email protected]> wrote:
...
> 1)
> heap_create:
> + errdetail("Conflict schema modifications are currently disallowed.")));
> LookupCreationNamespace:
> + errmsg("cannot move objects into or out of the pg_conflict schema")));
>
> Can we make it same through-out, either we use 'Conflict schema' at
> both the places or pg_conflict schema.  Since in these 2 functions, in
> previous messages, we are using names like 'System catalog', 'TOAST
> schema' etc, I think we can use Conflict schema at both the places.
> What do others think on this?
>

The suggested name of "Conflict schema" LGTM. My only concern was that
a user may not know where that is referring to. OTOH, things like
"System catalog" have 100s of mentions and whole documentation
chapters dedicated to them. If we go with "Conflict schema", then the
documentation needs to also consistently use that term, describe what
it is for, and make it very easy to look up and discover that
"Conflict schema" is 'pg_conflict'.

Currently (in patches 0008/9) there is very little explanation even
about what pg_conflict is, apart from just observing in passing that
the CLT gets written to that "dedicated namespace". It seems a bit
backwards describing the parent schema by the contents: Instead of
saying when there is a CLT it gets written there, IMO it should be the
other way around, and say there is a "Conflict schema" which is where
the CLTs (if any) reside.

======
Kind Regards,
Peter Smith.
Fujitsu Australia





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], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: Proposal: Conflict log history table for Logical Replication
  In-Reply-To: <CAHut+Ptaf=2p4c33jsuz9nJY4=TtfZzFkermAeL5q=krOjMYEw@mail.gmail.com>

* 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