At 9:23 AM +0100 4/26/07, Richard Huxton wrote:
Jonathan Vanasco wrote:
On Apr 25, 2007, at 2:05 PM, Richard Huxton wrote:
Owen Hartnett wrote:
I want to "freeze" a snapshot of the database every year (think
of end of year tax records). However, I want this frozen version
(and all the previous frozen versions) available to the database
user as read-only. My thinking is to copy the entire public
schema (which is where all the current data lives) into a new
schema, named 2007 (2008, etc.)
Sounds perfectly reasonable. You could either do it as a series of:
CREATE TABLE archive2007.foo AS SELECT * FROM public.foo;
or do a pg_dump of schema "public", tweak the file to change the
schema names and restore it.
the create table method won't copy the constraints + fkeys .
Shouldn't matter for an archive though, since you'd not want anyone
to have permissions. Still, pg_dump is my preference. Apart from
anything else, you can keep a copy of the dump around too.
Thanks to everyone for all the replies. You've been most helpful.
It looks like pg_dump is the way to go, though I'll have to think
about it because I'm ultimately looking for a mechanical process that
will automatically tweak the schema names. I don't want to have to
visit clients every year to archive their data. Since the pg_dump
file might change, my program may have to be version dependent.
-Owen
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