[erlang-questions] beginner: mnesia secondary indices with ordered_set

Ulf Wiger <>
Tue Oct 30 11:54:21 CET 2007


No, Mnesia has only one type of index.
The rdbms contrib in Jungerl implements index tables a bit
differently (as full mnesia tables), and supports ordered index,
among other things.

But to the best of my knowledge, rdbms is not actively used
by anyone (unless Rudolph van Graan is still using it).

BR,
Ulf W

2007/10/29, Paul Mineiro <>:
> hi.
>
> when i use ordered_set mnesia table type, i expect the primary key to be
> sorted and thus prefix lookups to be efficient.
>
> is the same true of secondary indices on ordered_set tables?  i.e., can
> i expect prefix lookups on secondary indices to be efficient?
>
> thanks,
>
> -- p
>
>
> Optimism is an essential ingredient of innovation. How else can the
> individual favor change over security?
>
>   -- Robert Noyce
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