Re: [HACKERS] Serial Data Type

Thus spake David Hartwig
> I have a couple minor issues regarding the 6.4 implementation of the
> SERIAL data type. I like the ease of using the serial data type and I
> suspect it will be used frequently base on the number of inquiries over
> the past months.
>
> 1. Should the sequence created by the serial type declaration, be
> dropped as a result of dropping the parent table?

Sounds like a good idea.

> 2. Can a declared serial column be also a primary key? If so, what
> will be the side effected? Specifically, how will the unique index be
> named? The ODBC driver uses the {relname}_pkey to identify the primary
> key of a table. The driver must be able to identify primary keys.

I suspect that the serial field will be the primary key 99% of the time.
I hope it can be.

As for finding the primary, with the new changes we should be able
to do something like this.

SELECT pg_class.relname, pg_attribute.attname
FROM pg_class, pg_attribute, pg_index
WHERE pg_class.oid = pg_attribute.attrelid AND
pg_class.oid = pg_index.indrelid AND
pg_index.indkey[0] = pg_attribute.attnum AND
pg_index.indisprimary = 't';

--
D'Arcy J.M. Cain <darcy(at){druid|vex}.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 424 2871 (DoD#0082) (eNTP) | what's for dinner.