On Fri, Sep 22, 2023 at 5:19 PM Luca Ferrari <fluca1978@xxxxxxxxx> wrote:
On Fri, Sep 22, 2023 at 3:24 PM Dominique Devienne <ddevienne@xxxxxxxxx> wrote:
You added information I was not aware before: you are dumping
PostgreSQL to restore it into SQLite, while I was thinking you wanted
to do some stuff with a PostgreSQL-to-PostgreSQL backup and restore.
I must be really bad at explaining things today, sorry...
Because of course I'm doing PostgreSQL-to-PostgreSQL backup/restore.
The fact I use a custom SQLite DB file as the backup's "format" instead of
a "pile-of-files" (or a TAR of that pile), is the only difference.
That, and the fact it's a backup that mixes one full schema with part of another.
And that my SQLite backup format is much more convenient and "expressive" IMHO,
since fully introspectable ("semi-opaque", since rows are still COPY BINARY encoded).
Writing the backup as an SQLite DB incurs a little overhead, of course,
compared to just appending to per-table files, but not that much when
in non-transactional mode. Acceptable tradeoff compared to the fact one
can open the backup easily and see the tables and rows almost as-is,
which also opens the door to partial restores (there are separates "roots",
independent entity trees, in these schemas).
