[jira] [Resolved] (FLINK-3614) Remove Non-Keyed Window Operator

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-3614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek resolved FLINK-3614.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: 1.1.0

Done in https://github.com/apache/flink/commit/505512dbe461b9840dde6197c71dbb90b49c0495

> Remove Non-Keyed Window Operator
> --------------------------------
>
>                 Key: FLINK-3614
>                 URL: https://issues.apache.org/jira/browse/FLINK-3614
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>             Fix For: 1.1.0
>
>
> I propose to remove the special Non-Keyed Window Operator and implement non-parallel windows by using the standard WindowOperator with a dummy KeySelector.
> Maintaining everything for two WindowOperators is a huge burden. The implementation is completely separate by now. For example, the Non-Keyed window operator does not use the StateBackend for state, i.e. cannot use RocksDB. Also, with upcoming changes (Merging/Session windows, aligned windows) this will only increase the maintenance burden.
> Also, the fast AlignedProcessingTimeWindows operators also only support the Parallel/Keyed case.



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