On Thu, Dec 1, 2016 at 7:07 AM, Francisco Olarte <fola...@peoplecall.com> wrote:
> Juliano: > > On Thu, Dec 1, 2016 at 12:16 PM, Juliano <jpli...@protonmail.com> wrote: > > I tried to restore pg_catalog to my new database, but the existing > > pg_catalog can't be overwritten or dropped, and postgres auto creates > > pg_catalog when I create a new DB. > > This is because, in general, pg_catalog is maintained by DML > statements, restoring it is not going to do what you think. > > I.e., if you create a table, a row goes into pg_class, but if you > somehow manage to insert into pg_class a table is not properly created > ( more things need to be done ). > > Copying pg_catalog from one db to other is like trying to copy the > root dir and FAT from one floppy ( how old fashioned ) to other, it > cannot be done with normal tools and probably won't do what you think > it does. > > > > So, there is a way to restore the pg_catalog to a new database? > > Probably not, but this has the faint smell of http://xyproblem.info/ , > what are you truing to achieve by doing that? > > Francisco Olarte. > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general > *Juliano,* *The right way to do what you want is to:* *A:* *1. pg_dump from the database you want to copy https://www.postgresql.org/docs/9.6/static/app-pgdump.html <https://www.postgresql.org/docs/9.6/static/app-pgdump.html>* *2. pg_restore the dump file too the new database. https://www.postgresql.org/docs/9.6/static/app-pgrestore.html <https://www.postgresql.org/docs/9.6/static/app-pgrestore.html>* *OR* *B:* *1: pg_dumpall from the cluster you want to copy https://www.postgresql.org/docs/9.6/static/app-pg-dumpall.html <https://www.postgresql.org/docs/9.6/static/app-pg-dumpall.html>* *2: use psql to restore the dump file into the new cluster https://www.postgresql.org/docs/9.6/static/app-psql.html <https://www.postgresql.org/docs/9.6/static/app-psql.html>* -- *Melvin Davidson* I reserve the right to fantasize. Whether or not you wish to share my fantasy is entirely up to you.
