Re: TODO: Add pg_get_acldef(), pg_get_typedefault(), pg_get_attrdef(), pg_get_tabledef(), pg_get_domaindef(), pg_get_functiondef() - Mailing list pgsql-hackers

"Joshua D. Drake" <jd@commandprompt.com> writes:
> So could I get some further definition?

There are two fairly strong reasons for NOT trying to push more logic
into the backend from pg_dump:

1. It would remove the freedom we currently have to make pg_dump adapt
dumps from old servers to match newer syntax/semantics.  This has saved
our bacon more than once in the past, so it shouldn't be given up
lightly.

2. The backend functions invariably read the catalogs under SnapshotNow
rules, making pg_dump unable to promise a consistent snapshot to the
extent that it relies on them.
        regards, tom lane