Обсуждение: How to drop all the sequences

On Thu, 2003-02-20 at 11:40, Arunachalam Jaisankar wrote:
> I found sequences are not getting dropped when tables are dropped.

SERIAL sequences should automatically be dropped with their
corresponding table in PostgreSQL 7.3.0 and later.

> It is too difficult to drop all sequences one by one manually. Is
> there any command to drop all sequences in a database?

No. You could try iterating through pg_class, picking out the sequence
relations (relkind = 'S') in the right database, and then dropping the
sequences that way.

Cheers,

Neil
--
Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC

> On Thu, 2003-02-20 at 11:40, Arunachalam Jaisankar wrote:
>
>> It is too difficult to drop all sequences one by one manually. Is
>> there any command to drop all sequences in a database?
>
> No. You could try iterating through pg_class, picking out the sequence
> relations (relkind = 'S') in the right database, and then dropping the
> sequences that way.
>

This is what I do:

Save the output of

SELECT 'drop sequence ' || c.relname || ';' FROM pg_class c WHERE
(c.relkind = 'S');

to a file and then run that.

~Berend Tober

Neil Conway wrote:
> On Thu, 2003-02-20 at 11:40, Arunachalam Jaisankar wrote:
> > I found sequences are not getting dropped when tables are dropped.
>
> SERIAL sequences should automatically be dropped with their
> corresponding table in PostgreSQL 7.3.0 and later.
>
> > It is too difficult to drop all sequences one by one manually. Is
> > there any command to drop all sequences in a database?
>
> No. You could try iterating through pg_class, picking out the sequence
> relations (relkind = 'S') in the right database, and then dropping the
> sequences that way.

As I remember, a 7.2 database loaded into 7.3 doesn't have the
dependency linkage.  /contrib/adddepend adds such linkage in 7.3 for
pre-7.3 database loaded into 7.3.

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