2010/10/26 Szymon Guz <mabew...@gmail.com>:
>
> Well, strange. Why is that slower?

To answer that fully, you would need to see the implementation.
suffice to say,

count(a) does:

if (a <> NULL)
{
  count++;
}

and count(*) does:

  count++;



-- 
GJ

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