Search Postgresql Archives

Re: 10 beta 4 foreign table partition check constraint broken?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Sep 21, 2017 at 02:59:21PM +0900, Michael Paquier wrote:

/tmp/mutt-mayon-1000-26043-945be079d938129298
> On Fri, Sep 15, 2017 at 10:43 PM, Paul Jones <pbj@xxxxxxxxxx> wrote:
> > Is this a bug in Postgres 10b4?  Looks like neither partition ranges
> > nor check constraints are honored in 10b4 when inserting into
> > partitions that are foreign tables.
> 
> Here is what you are looking for in the documentation:
> https://www.postgresql.org/docs/10/static/sql-createforeigntable.html
> Constraints on foreign tables (such as CHECK or NOT NULL clauses) are
> not enforced by the core PostgreSQL system, and most foreign data
> wrappers do not attempt to enforce them either; that is, the
> constraint is simply assumed to hold true. There would be little point
> in such enforcement since it would only apply to rows inserted or
> updated via the foreign table, and not to rows modified by other
> means, such as directly on the remote server. Instead, a constraint
> attached to a foreign table should represent a constraint that is
> being enforced by the remote server.

Thank you for the pointer... it is clear that I just didn't read far enough.

> 
> > Here is a nearly shovel-ready example.  Just replace with your
> > servers/passwords.
> >
> > -- --------------------------
> > -- Server 2
> > -- --------------------------
> >
> > CREATE DATABASE cluster;
> > \c cluster
> >
> > CREATE TABLE foo_10000 (
> >         id      INT NOT NULL,
> >         name    TEXT
> > );
> 
> So here I think that you should add a CHECK constraint to this table,
> and that the behavior of your example works as expected.

I will try this, thanks!

> -- 
> Michael

.


-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]

  Powered by Linux