GitHub user aljoscha opened a pull request:
https://github.com/apache/flink/pull/1973
[FLINK-3869] Relax window fold generic parameters
Before, the WindowFunction in a fold/apply could not emit a type that
was different from the accumulator type of the fold. This restriction is
unnecessary.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/flink window-fold-relax
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1973.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1973
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commit 0e0d9b79b770d9708935920014314e4021e9751e
Author: Aljoscha Krettek <aljoscha.kret...@gmail.com>
Date: 2016-05-05T06:34:44Z
[FLINK-3869] Relax window fold generic parameters
Before, the WindowFunction in a fold/apply could not emit a type that
was different from the accumulator type of the fold. This restriction is
unnecessary.
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