Обсуждение: pg_dump doesn't save correct the sequences

On Thu, 28 Oct 2004, Andrei Bintintan wrote:

> I try to dump a database from a 7.4.2 postgre system and to import it on
> a 7.3.2. system, but I have a problem with the sequences in the dump.

In general, the above is not guaranteed to work. pg_dump will use features
of the dumping version so moving the dump to an earlier version is filled
with danger.

> This is a seq example:
>
> CREATE SEQUENCE test_id_seq
>     INCREMENT BY 1
>     NO MAXVALUE
>     NO MINVALUE
>     CACHE 1;
>
> This gives me an error when restoring on the 7.3 machine.

Looking at the documentation, it looks like NO MAXVALUE and NO MINVALUE
were added in 7.4.

> I don't know what happened, because last week I also put a dump from 7.4
> to 7.3 without any problems.

> A coelege from me made an application and some modifications in the 7.4
> database system, now I see that in every database there are these tables
> that weren't before: sql_features, sql_implementation_info,
> sql_languages, sql_packages, sql_sizing, sql_sizing_profiles.

I believe these are part of the SQL standard information_schema.

Okay, If I modify all the Sequences in the dump, everything works fine.
Is there any possibility to specify to the pg_dump to save the sequences
with the "old" type??? I mean not with No MAXVALUE and No Minvalue???

My problem is that the 7.3 database I cannot "update" it for the moment for
diverse reasons, and I would like not to modify any dump anymore.

A strange thing is that this type of dump already worked once....



----- Original Message -----
From: "Stephan Szabo" <sszabo@megazone.bigpanda.com>
To: "Andrei Bintintan" <klodoma@ar-sd.net>
Cc: <pgsql-admin@postgresql.org>
Sent: Thursday, October 28, 2004 9:22 AM
Subject: Re: [ADMIN] pg_dump doesn't save correct the sequences


>
> On Thu, 28 Oct 2004, Andrei Bintintan wrote:
>
> > I try to dump a database from a 7.4.2 postgre system and to import it on
> > a 7.3.2. system, but I have a problem with the sequences in the dump.
>
> In general, the above is not guaranteed to work. pg_dump will use features
> of the dumping version so moving the dump to an earlier version is filled
> with danger.
>
> > This is a seq example:
> >
> > CREATE SEQUENCE test_id_seq
> >     INCREMENT BY 1
> >     NO MAXVALUE
> >     NO MINVALUE
> >     CACHE 1;
> >
> > This gives me an error when restoring on the 7.3 machine.
>
> Looking at the documentation, it looks like NO MAXVALUE and NO MINVALUE
> were added in 7.4.
>
> > I don't know what happened, because last week I also put a dump from 7.4
> > to 7.3 without any problems.
>
> > A coelege from me made an application and some modifications in the 7.4
> > database system, now I see that in every database there are these tables
> > that weren't before: sql_features, sql_implementation_info,
> > sql_languages, sql_packages, sql_sizing, sql_sizing_profiles.
>
> I believe these are part of the SQL standard information_schema.
>
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