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Re: Data corruption while taking backup of database

From: Pushker Chaubey <pchaubey(at)vertex(dot)co(dot)in>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Data corruption while taking backup of database
Date: 2008-06-26 10:20:19
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc
Hi Tom,

We actually follow the following order while doing restore

1) disable triggers
2) drop the foreign key constraints only
3) truncate all the existing tables
4) do the restore
5) recreate the constraints
6) enable triggers

Pushker Chaubey

Tom Lane wrote:
> Pushker Chaubey <pchaubey(at)vertex(dot)co(dot)in> writes:
>> We took back up of a database using the following command
>> pg_dump -a
>> In the back up file that was generated we found some data that was 
>> violating foreign key constraints. And there fore we were not able to 
>> restore database back with this back up file.
> Was the data actually erroneous, or just loaded in the wrong order
> (ie, referencing table before referenced one)?  pg_dump -a doesn't
> guarantee to use a safe reload order.
> 			regards, tom lane

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