Hi, On Tue, Oct 04, 2022 at 02:15:16PM +0200, Pavel Stehule wrote: > > út 4. 10. 2022 v 12:48 odesílatel Никита Старовойтов <nikstar...@gmail.com> > napsal: > > > Hello, > > with a view to meeting with postgres code and to get some practice with > > it, I am making a small patch that adds the possibility of partial tables > > dump. > > A rule of filtering is specified with standard SQL where clause (without > > "where" keyword) > > What is benefit and use case? For this case I don't see any benefit against > simple > > \copy (select * from xx where ...) to file CSV > > or how hard is it to write trivial application that does export of what you > want in the format that you want?
Also, such approach probably requires a lot of effort to get a valid backup (with regards to foreign keys and such). There's already a project dedicated to generate such partial (and consistent) backups: https://github.com/mla/pg_sample. Maybe that would address your needs?
