What is the meaning of pg_restore output?

[Alexandru Lazarev <alexandru.lazarev@xxxxxxxxx>]

Hi PG community,

I have questions about pg_restore output.

At some point of time in pg_restore output was such phrase "pg_restore: setting owner and privileges for <RELATION_NAME>", then it disappeared, it seems, when upgraded from PG 9.6.2 to 9.6.6

Other phrases "pg_restore: processing item 3615 DEFAULT id
pg_restore: creating DEFAULT "public.id"

are observed if pg_restore is executed with flag -j N (where N > 1)

and aren't present when -j 1 (or without -j)

So main questions are:

1. What is the meaning of this phrases?

2. Are they documented somewhere?

3. Is it possible that output change from version to version?

Why I am asking?

I saw a script which does pg_restore and grep some of this phrases as SUCCESS indicator that pg_restore passed OK (+ something like grep -iv "error").

script doesn't use pg_restore exit code because, as I understood from the authors, in the past were situations that pg_restore returned 0 code but didn't restore of db.

Any answers, hints are welcome :).

Thanks

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