Re: Database Design: Maintain Audit Trail of Changes

On Thu, Jan 3, 2013 at 2:09 PM, Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com>
wrote:
>
> On 01/03/2013 07:38 AM, Rich Shepard wrote:
>
>> The middleware of the application needs to check this table when data
>> are
>> to be viewed in the UI and present only the current row contents. A
>> separate
>> view would display a history of changes for that row.
>>
>> All thoughts, suggestions, and recommendations based on your
>> expertise and
>> experience will be most welcome.
>
>
> As a matter of course I include fields to record the timestamp and user
for insert of records and last update of record on my tables.
>
> For a relatively simple solution see this blog post I put up this summer:
>
> http://aklaver.org/wordpress/2012/06/23/postgres-and-hstore/
>
> I have since expanded that to include updates by using TG_OP to determine
the operation being done on the table.
>
> There is also pg_audit
> :
> https://github.com/jcasanov/pg_audit
>

And keep in mind that kind of table tend to grow quickly, so you must use
some strategy to purge old historical data or make your audit table
partitioned...

I implemented the same think in our ERP a long time ago using partitioned
approach, because its easy to purge old historical data.

Regards,

--
Fabrízio de Royes Mello
Consultoria/Coaching PostgreSQL
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