Re: historical log of data records

On Tue, 2021-11-16 at 13:56 +0530, Sanjay Minni wrote:
> I need to keep a copy of old data as the rows are changed. 
>
> For a general RDBMS I could think of keeping all the data in the same table with a flag
> to indicate older copies of updated /  deleted rows or keep a parallel table and copy
> these rows into the parallel data under program / trigger control. Each has its pros and cons. 
>
> In Postgres would i have to follow the same methods or are there any features / packages available ?

Yes, I would use one of these methods.

The only feature I can think of that may help is partitioning: if you have one partition
for the current data and one for the deleted data, then updating the flag would
automatically move the row between partitions, so you don't need a trigger.

Yours,
Laurenz Albe
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