Re: [SQL] Problem: Referential Integrity Constraints lost

On Thu, 7 Nov 2002, Achilleus Mantzios wrote:

> On Wed, 6 Nov 2002, Stephan Szabo wrote:
>
> > On Wed, 6 Nov 2002, Achilleus Mantzios wrote:
> >
> > >
> > > Hi i think a hit a major problem on 7.2.1.
> > > I run 3 systems with postgresql 7.2.1.
> > > Its a redhat 7.1 for development, a redhat 7.3 for production
> > > and a FreeBSD 4.6.1RC2 for testing.
> > >
> > > After long runs (with periodic (daily) vacuum analyze's)
> > > i noticed that some of the triggers that implement referential integrity
> > > constraints just disapeared.
> > > Some of these triggers were still present on the FreeBSD system
> > > (which has been idle for a month or so), whereas on the linux
> > > systems they were absent.
> > >
> > > Has any one have a clue??
> >
> > Hmm, you haven't done anything like cluster or an incomplete dump and
> > reload have you?
>
> No,
> Also the FreeBSD system's database was populated with data from
> the production on 2002-10-22, so the problem on the FreeBSD
> was partially inherited from the production databse.

Also i must add, that the database on the production system
was never dumped/reloaded since the creation of the system.

The production 7.2.1 pgsql db was created and loaded on 2002-04-20,
from a 7.1.3 pgsql on our previous Solaris box (which we replaced
with a new linux one).
The production pgsql is started/stopped only during
system shutdowns/boots.

We had some unexpected system failures due to some
Linux/MotherBoard/BIOS problems.
(I was too enthusiastic about pgsql and its stability
that i was overconfident about our database's state
after these failures).
BTW, could that be the cause of the problem??

The problem is that i didnt realize the problem until yesterday.
The only thing i am sure, is that some of the triggers lost
one both linux'es are present on the FreeBSD system,
which was populated on Oct 22, and had NO deletion activity
at all.

I plan to make a huge map of all my tables, and configure
all the pairs of tables with inter-referential integrity constraints,
pg_dump --schema-only, see which triggers are missing
and then create them by hand.

Has anyone got a better idea??
After recreating the missing triggers should i upgrade
to 7.2.3??

Thanx.

>
> >
> >
> >
>
> ==================================================================
> Achilleus Mantzios
> S/W Engineer
> IT dept
> Dynacom Tankers Mngmt
> Nikis 4, Glyfada
> Athens 16610
> Greece
> tel: +30-10-8981112
> fax: +30-10-8981877
> email: achill(at)matrix(dot)gatewaynet(dot)com
> mantzios(at)softlab(dot)ece(dot)ntua(dot)gr
>
>
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==================================================================
Achilleus Mantzios
S/W Engineer
IT dept
Dynacom Tankers Mngmt
Nikis 4, Glyfada
Athens 16610
Greece
tel: +30-10-8981112
fax: +30-10-8981877
email: achill(at)matrix(dot)gatewaynet(dot)com
mantzios(at)softlab(dot)ece(dot)ntua(dot)gr