From: | Philip Warner <pjw(at)rhyme(dot)com(dot)au> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Re: Details for planned template0/template1 change |
Date: | 2000-11-13 17:28:04 |
Message-ID: | 3.0.5.32.20001114042804.033d98e0@mail.rhyme.com.au |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
At 11:48 13/11/00 -0500, Tom Lane wrote:
>
>5. pg_dump should ignore objects with OID <= lastsysoid of the target
> database.
I think it should ignore objects with OID <= lastsysoid of template0; then
when it does a restore, it should use 'WITH TEMPLATE template0'. At least
this should be an option.
>I think that
>a dballowconn flag might have other uses anyway, such as temporarily
>disallowing new connections to a database you are doing major work in.
eg. while a restore script is running...
BTW: are there any nice ways to:
- set the flag
- kick current users off without corrupting memory
(ie. shutdown a single database).
>lastsysoid will probably always be the same for all databases in an
>installation, since they'll all inherit the value from template0 or
>template1. However, there is the possibility of changing it to exclude
>some items from backup, so I'm continuing to treat it as a per-database
>value.
Sounds fine; but we need to use lastsysoid of template0 in pg_dump. Consider:
- add function foo() to template1, OID=100000
- create db1 (inherits foo())
- update function foo() in template1, and also update it in db1. New OID >
100000
- dump db1 - will dump foo().
- restore db1 using template1->crash
However, dumping based oi lastsysoid of template0, then restoring based on
template0 works...
Otherwise sounds good!
----------------------------------------------------------------
Philip Warner | __---_____
Albatross Consulting Pty. Ltd. |----/ - \
(A.B.N. 75 008 659 498) | /(@) ______---_
Tel: (+61) 0500 83 82 81 | _________ \
Fax: (+61) 0500 83 82 82 | ___________ |
Http://www.rhyme.com.au | / \|
| --________--
PGP key available upon request, | /
and from pgp5.ai.mit.edu:11371 |/
From | Date | Subject | |
---|---|---|---|
Next Message | Tom Lane | 2000-11-13 17:33:52 | Re: UUNET socket-file-location patch |
Previous Message | Tom Lane | 2000-11-13 17:22:09 | Re: Details for planned template0/template1 change |