MIME-Version: 1.0
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>
 <CAJpy0uB6C6HfZcpDLFkywROGokdUZq0oX_EMhJz_gB17qaJmKw@mail.gmail.com>
 <CAJpy0uC4a2SpBBO7cgiKdaEzYu9t7oQMsm9oVHtGaDOEkjta1g@mail.gmail.com>
 <CAJpy0uAZy4khcAtN7KTwOHhnXAWXGc1uNp5F3qRc7k+xWj-XLg@mail.gmail.com> <CAJpy0uBa6j4bR8Kw1NjEKhwYLo_bd25iGaBdpjYLiMQ6oyoyeg@mail.gmail.com>
In-Reply-To: <CAJpy0uBa6j4bR8Kw1NjEKhwYLo_bd25iGaBdpjYLiMQ6oyoyeg@mail.gmail.com>
From: shveta malik <shveta.malik@gmail.com>
Date: Thu, 29 Jan 2026 16:46:10 +0530
Message-ID: <CAJpy0uCvQuC+x7OV6aUv5MWHcVMOqOdDcnCK5uN=d7VKthpY8A@mail.gmail.com>
Subject: Re: Proposal: Conflict log history table for Logical Replication
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>, vignesh C <vignesh21@gmail.com>, 
	Amit Kapila <amit.kapila16@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, 
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, 
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, shveta malik <shveta.malik@gmail.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://www.postgresql.org/message-id/CAJpy0uCvQuC%2Bx7OV6aUv5MWHcVMOqOdDcnCK5uN%3Dd7VKthpY8A%40mail.gmail.com>
Precedence: bulk

Dilip, I was testing patch002, few observations:

1)
remote_commit_ts is '2026-01-29 14:38:02.777599+05:30' while
local_conflicts.commit_ts is of format
'2026-01-29T14:37:35.805819+05:30' i.e. a 'T' to separate date and
time in local-commit_ts case. IIUC, this is the expected (standard)
way for timestamps to be in json-format. Can you please confirm?

2)
Differences between LOG and TABLE:

a) In LOG, the column names are not included in the remote or local
tuples, whereas in the TABLE, they are. For example:

LOG: Could not apply remote change: remote row (2, 3, 4)
TABLE: remote_tuple: {"a":2,"b":3,"c":4}

b) remote_commit_ts is not recorded in LOG, but it is included in the TABLE=
.

IMO, both of these differences are okay as TABLE is expected to store
(or can store) more detailed information. I=E2=80=99m just noting these her=
e
for others=E2=80=99 input. Let me know your thoughts.

3)
If we look at the table overall, the name 'local_conflicts' can be a
bit misleading. This column actually stores the details about local
rows involved in a conflict, rather than describing the conflict
itself. See example below. A clearer name might be local_data,
local_tuples_data, or local_tuples_detail. Thoughts?

local_conflicts for one update_exists:
{"{\"xid\":\"791\",\"commit_ts\":\"2026-01-29T14:37:35.805819+05:30\",\"ori=
gin\":null,\"key\":{\"i\":40},\"tuple\":{\"i\":40,\"j\":10}}"}
~~

patch002 works well in my testing done so far.

thanks
Shveta