On Sat, Jun 03, 2000 at 05:22:56PM +0200, Louis-David Mitterrand wrote:
> When creating a child (through CREATE TABLE ... INHERIT (parent)) it
> seems the child gets all of the parent's contraints _except_ its PRIMARY
> KEY. Is this normal? Should I add a PRIMARY KEY(id) statement each time
> I create an inherited table?
Following up to my previous message, I found that one can't explicitely
add a PRIMARY KEY on child table referencing a field on the parent
table, for instance:
CREATE TABLE auction ( id SERIAL PRIMARY KEY, title text, ... etc... );
then
CREATE TABLE auction_dvd ( zone int4, PRIMARY KEY("id") ) inherits("auction");
doesn't work: ERROR: CREATE TABLE: column 'id' named in key does not exist
But the aution_dvd table doesn't inherit the auction table's PRIMARY
KEY, so I can insert duplicates.
Solutions:
1) don't use PRIMARY KEY, use UNIQUE NOT NULL (which will be inherited?)
but the I lose the index,
2) use the OID field, but it's deprecated by PG developers?
What would be the best solution?
TIA
--
Louis-David Mitterrand - ldm@apartia.org - http://www.apartia.fr
Veni, Vidi, VISA.