Hi Martijn,

>> If you create the PK as part of the CREATE TABLE statement, then yes,
>> it will be set to "not null" automagically.

Yes, I've tested that already and it is indeed true.

Back at the start of the thread I mentioned to Mike that if I created a
table as follows:

create table whatever (
id integer primary key,
...);

Then even though I didn't specify it, the ID column would be changed to
NOT NULL. I have no problem with this happening, I understand that a PK
column needs to be NOT NULL, and Oracle, which I work with does exactly
the same.

My problem was/is that if I try the following:

create table whatever (
id integer,
...);

alter table whatever add constraint pk_whatever
primary key (id)
using index some_index;

Then an error occurs. The ID column is not changed to NOT NULL silently,
and the command fails.

Mike, on the other hand, *is* able to run the above command quite
happily without getting an error. We are both using exactly the same
version of Firebird - 2.1.3.


Cheers,
Norman.

Norman Dunbar
Contract Senior Oracle DBA
CIS Engineering Services
Internal : 7 28 2051
External : 0113 231 2051



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