William Oberman 2013-07-17, 18:27
-Re: DISTINCT and paritioner
William Oberman 2013-07-17, 18:30
I forgot to PS my (*).
(*) For JOIN, my test was basically:
JOIN A by $0, B by $0
And my system.out showed K = $0, and V = A less $0 (or B less $0). E.g. if
A = (1,2,3), then K = 1, and V = (2,3)
GROUP A by $0
Showed K = $0, V = A less $0. E.g. if A = (1,2,3), then K=1 and V = (2,3)
On Wed, Jul 17, 2013 at 2:27 PM, William Oberman
> The docs say DISTINCT can take a custom partitioner. How does that work?
> What is "K" and "V"?
> I'm having some doubts the docs are correct. I wrote a test partitioner
> that does a System.out of K and V. I then wrote simple scripts to do JOIN,
> GROUP and DISTINCT. For JOIN and GROUP I see my system.outs(*). For
> DISTINCT, I see nothing....
> Using 0.11.1.
Alan Gates 2013-07-18, 15:28
William Oberman 2013-07-19, 13:24