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Posted to dev@gearpump.apache.org by "Manu Zhang (JIRA)" <ji...@apache.org> on 2017/05/27 08:13:04 UTC

[jira] [Assigned] (GEARPUMP-316) Don't enforce groupBy after window

     [ https://issues.apache.org/jira/browse/GEARPUMP-316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manu Zhang reassigned GEARPUMP-316:
-----------------------------------

    Assignee: Manu Zhang

> Don't enforce groupBy after window
> ----------------------------------
>
>                 Key: GEARPUMP-316
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-316
>             Project: Apache Gearpump
>          Issue Type: Sub-task
>          Components: streaming
>            Reporter: Manu Zhang
>            Assignee: Manu Zhang
>
> Return a normal Stream instead of WindowStream on window function. Window function defines a boundary (window) for elements and the following operations should fall in corresponding boundaries. The boundary should not change until a new window function is defined. The default boundary is the {{GlobalWindows}}.
> This means there will be a window context for each underlying task. Elements are emitted in terms of the trigger semantics. 



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