> On 6 Jan 2017, at 16:56, Job <j...@colliniconsulting.it> wrote:
> 
> W e use a function, the explain analyze is quite similar:
> POSTGRESQL 8.4.22:
>  Total runtime: 1.531 ms
>  
> POSTGRES 9.6.1:
>  Execution time: 4.230 ms

Are you being serious? You're complaining about a "big slowdown" for a query 
that goes from 1.5ms to 4ms?
What is the actual problem you're trying to solve? Because I don't see one in 
the above.

Just saying, you're obviously worried about something, but should you be? 

Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.



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