On Sun, 23 May 2004 17:32:36 -0400, Tom Lane <[EMAIL PROTECTED]> wrote:
>I took out the TupleCount typedef and went
>back to using doubles for the tuple counts; this is more consistent with
>the coding style used elsewhere, and I really doubt that it's any

Performance was not the primary motivation.  I found it confusing to
have doubles everywhere and not to know whether a variable is declared
as double, because
  . we need the fractional part (e.g. a probability)
  . or it should be able to hold an integral value of more than 32 bits.
So I just invented my own datatype for huge integers.  Long long would
have been a natural choice, but AFAIK its not available on all

>I was initially convinced that your implementation of Knuth's algorithm
>S was all wet, so now there's a bunch of comments explaining why it's
>actually correct...

Thanks.  I like your explanation.  My justification for that change was
a lot more complicated.


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