[Haskell-cafe] relational data representation in memory using
marco-oweber at gmx.de
Thu May 22 10:48:01 EDT 2008
On Thu, May 22, 2008 at 03:34:36PM +0200, Marc Weber wrote:
> On Thu, May 22, 2008 at 09:11:28AM -0400, Isaac Dupree wrote:
> > to whoever in this thread hasn't realized it:
> > Map String (Map Int Foo) == Map (String,Int) Foo
> > (at least to an approximation)
There is another difference if you want to query <,<=,>,>=
say String = city and Int = age.
Now take Map (Int, String) rec and use this index to filter all tuples
having an age >= 80 and beeing "city"
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