There is no SERIAL type in the standard at all. Moreover, standard
defines following expression for SEQUENCE GENERATORs:
<next value expression> ::= NEXT VALUE FOR <sequence generator name>
Postgres has non-standard equivalent - nextval(<sequence generator name>)...
So, sequences implementation in PostgreSQL isn't standard-compliant.
On 2/7/06, John D. Burger <john@mitre.org> wrote:
> Tom Lane wrote:
>
> > The correct solution to this is to forbid ALTER COLUMN SET DEFAULT on
> > a serial column, but we haven't gotten around to enforcing that yet.
>
> Is this per the Standard? If so, then the oft-repeated mantra that
> SERIAL is simply a macro for an INTEGER column with a particular
> DEFAULT seems a bit misleading ...
>
> - John D. Burger
> MITRE
>
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--
Best regards,
Nikolay
