> -----Original Message----- > From: Andreas Pflug [mailto:[EMAIL PROTECTED] > Sent: 18 February 2004 10:13 > To: Christopher Kings-Lynne > Cc: [EMAIL PROTECTED]; [pgADMIN] > Subject: Re: [pgadmin-support] inserting new records without OIDs > > Christopher Kings-Lynne wrote: > > >> Not true. Currently, you need either OID *or* a primary key. > >> Obviously, that id column should get a pk. > >> We'll extend the grid some time, to accept any other unique keys > >> also. Still, defining a PK on every table is best practice. > >> Defining a column as serial does *not* guarantee it's unique! > > > > > > Remember that unique indexes can have multiple NULL values. > > Shhh, didn't think of that. So we won't ever accept unique > indices for this.
Unique + not null should be OK, but only if the data was inserted with that constraint in place. > > Also, oids are not guaranteed unique. > > AFAICS this only happens on wrap around, i.e. hopefully > never. Being strict, we shouldn't rely on oid uniqueness, but > in practice hopefully nobody will ever notice. <grin> Regards, Dave. ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
