Yes, I think most databases automatically index the primary key. Note, 
web2py stores the database timings for the queries in a given request 
(which can be viewed in response.toolbar(), so you can compare the speed of 
different queries).

Anthony

On Thursday, October 22, 2015 at 7:22:35 PM UTC-4, Alex Glaros wrote:
>
> is the default primary key indexed?
>
> I mean if I had 1 million addresses, with countryID as a foreign key, 
> would the look-up be faster searching on primary key or would it take same 
> time as searching on something like foreign key country_code "US", "MX", 
> etc.?
>
> thanks
>
> Alex Glaros
>

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