Re: vacuum and serial primary keys

On Saturday 01 February 2003 07:45, Carmen Marincu wrote:
> I am using Postgresql 7.1.3 and I have deleted 3000 rows from a table
> (with DELETE).
> Than I used vacuum <mytable> to actually delete the rows markes as deleted
> by the DELETE command..
> The trouble is that the "counter" for the serial primary key (ID field)
> wasn't reset. So now althought I have only 2 rows in my table they have
> the ID 3001 and 3002.
>
> Is this normal ? If not could someone please explain me how could  I reset
> the "counter" to ignore the deleted rows ?

It is very normal.  The last thing you need is a database engine that changes
your primary key without an explicit command to do so.  In fact, sometimes I
think that the database should enforce the rule that primary keys are
immutable and not even allow it explicitely.  Perhaps a configuration option.

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