On Tue, Jun 12, 2018 at 09:05:23AM +0000, Ideriha, Takeshi wrote: > >From: Surafel Temesgen [mailto:surafel3...@gmail.com] > >Subject: ON CONFLICT DO NOTHING on pg_dump > > >Sometimes I have to maintain two similar database and I have to update one > >from the other and notice having the option to add ON CONFLICT DO NOTHING > >clause to >INSERT command in the dump data will allows pg_restore to be done > >with free of ignore error. > > Hi, > I feel like that on-conflict-do-nothing support is useful especially coupled > with --data-only option. > Only the difference of data can be restored.
But that's additive-only. Only missing rows are restored this way, and differences are not addressed. If you want restore to restore data properly and concurrently (as opposed to renaming a new database into place or whatever) then you'd want a) MERGE, b) dump to generate MERGE statements. A concurrent data restore operation would be rather neat. Nico --
