Re: is PG able to handle a >500 GB Database?

Sorry if I missed something.

El Vie 19 Ene 2001 11:08, Florent Guillaume escribió:
> > Unless your application logic tries to use OIDs as row identifiers,
> > duplicate OIDs in user tables are not a problem.
>
> Hmmm, that means that the following, which I use, is not strictly correct :
>
> create table t1 (recordid SERIAL PRIMARY KEY, val INT4, name TEXT);
> ... much later ...
> insert into t1 (val, name) values (3465, 'blah');
> -- PHP application gets $lastoid for this insert

pg_getlastoid?

> select recordid from t1 where oid = $lastoid;
> -- PHP application now hast the recordid that was created.
>
> Because the last select could return several lines.

Shouldn't! oids are unique over the whole database server (I'm right on
this?) So you should have only one or non.

> What would be the correct idiom ? Explicitly use nextval ? That pretty
> defeats the point of SERIAL, no ?

SERIAL in Postgres is a primary key + a sequence + a default value on the
column to nextval. Pretty different from informix.

Saludos... :-)

--
System Administration: It's a dirty job,
but someone told I had to do it.
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Martín Marqués            email:     martin@math.unl.edu.ar
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