Re: Help with restoring a dump in Tar format? (dependencies/ordering)

On 6/5/2017 5:49 PM, David G. Johnston wrote:
> On Mon, Jun 5, 2017 at 5:40 PM, John R Pierce <pierce(at)hogranch(dot)com
> <mailto:pierce(at)hogranch(dot)com>>wrote:
>
> ​i​
> ndeed, any sort of constraint that invokes a function call which
> looks at other tables could later be invalidated if those other
> tables change, and postgres would be none the smarter. the same
> goes for trigger based checks.
>
>
> ​ Yes. I could imagine a new kind of "multi-referential trigger" that
> would specify all relations it touches and the function to fire when
> each of them is updated. While you'd still have to write the
> functions correctly it would at least allow one to explicitly model
> the multi-table dynamic in pg_catalog. Lacking that CHECK is no worse
> than TRIGGER and we've decided to say "use triggers".

at $job, the policy is, AVOID ALL TRIGGERS AND FANCY CONSTRAINTS :)

they don't even like using foreign key references, and rely on code
logic to do most joins in the performance-critical OLTP side of things.

--
john r pierce, recycling bits in santa cruz