On Jul 29, 2009, at 8:26 AM, nha wrote:
Hello,
Le 29/07/09 15:02, Jasen Betts a écrit :
On 2009-07-27, Bob Gobeille <bob.gobei...@hp.com> wrote:
I would like to combine multiple databases (same schema) into one
master db. Does anyone know how I can reconcile all my primary and
foreign keys to maintain referential integrity.
prefix them all with something that's unique to their source
database.
easy to say, hard to do.
A process (and solution) may be different whether:
-the master db will replace all other databases (ie. data manipulation
would directly perform on data managed by master db);
-or the master db will reflect a combined view of data hosted by all
other databases (ie. data manipulation would still perform on
distributed databases and master db would play a role of federated
view);
-or both (data manipulation have to be manageable at the both side: on
master db and on distributed db).
In my immediate case, I'm simply combining 7 global databases into a
single master.
Eventually, I would like to allow our (fossology.org) users to
subscribe to data in other databases. That is, allow
users to do periodic one-way batch updates from other servers.
Bob
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