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From Aljoscha Krettek <aljos...@apache.org>
Subject Re: Slinding Window Join (without duplicates)
Date Tue, 24 Nov 2015 09:33:15 GMT
I’m not sure this is a problem. If a user specifies sliding windows then one element can
(and will) end up in several windows. If these are joined then there will be multiple results.
If the user does not want multiple windows then tumbling windows should be used.

IMHO, this is quite straightforward. But let’s see what others have to say.

> On 23 Nov 2015, at 20:36, Matthias J. Sax <mjsax@apache.org> wrote:
> Hi,
> it seems that a join on the data streams with an overlapping sliding
> window produces duplicates in the output. The default implementation
> internally just use two nested-loops over both windows to compute the
> result.
> How can duplicates be avoided? Is there any way after all right now? If
> not, should be add this?
> -Matthias

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