RE: primary key question

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El 20-Jul-2000 Carolyn Lu Wong escribio:

> create table aaa(
>       field1  .... not null,
>       field2  ....,
>       ....,
>       primary key (field1, field2)
> );
> 
> Based on the above table definition, field2 allows null values. But
> after the table created based on the above script, field2 becomes not
> null. The only conclusion I come up with is setting the field as part of
> the primary key, PostgreSQL automatically sets the field to not null. Or
> is it something else?
> 
> Is this a feature or bug?
It's a SQL feature, because primary key must no contain null values.

Pablo Niklas
pniklas@bigfoot.com


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