Re: Conflict detection and logging in logical replication
shveta malik <shveta.malik@gmail.com>
From: shveta malik <shveta.malik@gmail.com>
To: Peter Smith <smithpb2250@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>, "Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, "Hayato Kuroda (Fujitsu)" <kuroda.hayato@fujitsu.com>,
Nisha Moond <nisha.moond412@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>,
Dilip Kumar <dilipbalaut@gmail.com>, Jan Wieck <jan@wi3ck.info>, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, shveta malik <shveta.malik@gmail.com>
Date: 2024-08-28T03:30:17Z
Lists: pgsql-hackers
On Tue, Aug 27, 2024 at 4:37 AM Peter Smith <smithpb2250@gmail.com> wrote: > > On Mon, Aug 26, 2024 at 7:52 PM Amit Kapila <amit.kapila16@gmail.com> wrote: > > > > On Thu, Aug 22, 2024 at 2:21 PM Amit Kapila <amit.kapila16@gmail.com> wrote: > > > > > > On Thu, Aug 22, 2024 at 1:33 PM Peter Smith <smithpb2250@gmail.com> wrote: > > > > > > > > Do you think the documentation for the 'column_value' parameter of the > > > > conflict logging should say that the displayed value might be > > > > truncated? > > > > > > > > > > I updated the patch to mention this and pushed it. > > > > > > > Peter Smith mentioned to me off-list that the names of conflict types > > 'update_differ' and 'delete_differ' are not intuitive as compared to > > all other conflict types like insert_exists, update_missing, etc. The > > other alternative that comes to mind for those conflicts is to name > > them as 'update_origin_differ'/''delete_origin_differ'. > > > > For things to "differ" there must be more than one them. The plural of > origin is origins. > > e.g. 'update_origins_differ'/''delete_origins_differ'. > > OTOH, you could say "differs" instead of differ: > > e.g. 'update_origin_differs'/''delete_origin_differs'. > +1 on 'update_origin_differs' instead of 'update_origins_differ' as the former is somewhat similar to other conflict names 'insert_exists' and 'update_exists'. thanks Shveta
Commits
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Rename the conflict types for the origin differ cases.
- 640178c92e3f 18.0 landed
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Doc: explain the log format of logical replication conflicts.
- edcb71258504 18.0 landed
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Log the conflicts while applying changes in logical replication.
- 9758174e2e5c 18.0 landed
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Avoid duplicate table scans for cross-partition updates during logical replication.
- a67da49e1d98 18.0 cited