On Aug 25, 2009, at 4:16 PM, Adrian Klaver wrote:

> A  dataset is just an in memory SQLite db.


        Not quite.

        A dataset is a tuple. Well, a subclass of tuple that adds an  
execute() method and a bunch of filtering methods. The way it carries  
out these DB-like actions is via an SQLite in-memory table that is  
created *only* if needed. Unless you're filtering or executing SQL  
statements against a dataset, it's a plain old tuple.


-- Ed Leafe





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