Re: mirroring table

Craig Ringer wrote:
>
> It sounds like what you want is to have a table that contains a full
> history of records, plus another table that contains only the records
> from the first table that were inserted/updated today.
>
> If that is what you mean, there are several ways to do it, with
> different advantages and disadvantages.
>
> You can treat your smaller table as a materialized view, where you use
> triggers to update it and run a batch job (with cron or similar) every
> night to clear it.
>
> Another way is to make it a normal view, possibly with rules in place to
> make it updatable. You could use a partial index on the primary key
> that's restricted to tuples inserted/updated more recently than a given
> date to improve performance of the view.
>
> For that matter, you could even use table partitioning to do it, though
> this would involve a bit of manual (or scripted) maintenance.
>
> Anyway, this is all speculation if I've missed the point of your
> question. If I'm mistaken about what you meant, perhaps you could
> explain in a little more detail?
>
> --
> Craig Ringer
>
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>

Thanks for the reply Craig..this is answered my question...

thanks again

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