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From "Xingcan Cui (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (FLINK-7996) Add support for (left.time = right.time) predicates to window join.
Date Mon, 06 Nov 2017 13:06:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-7996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xingcan Cui reassigned FLINK-7996:
----------------------------------

    Assignee: Xingcan Cui

> Add support for (left.time = right.time) predicates to window join.
> -------------------------------------------------------------------
>
>                 Key: FLINK-7996
>                 URL: https://issues.apache.org/jira/browse/FLINK-7996
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API & SQL
>    Affects Versions: 1.4.0
>            Reporter: Fabian Hueske
>            Assignee: Xingcan Cui
>            Priority: Critical
>             Fix For: 1.4.0
>
>
> A common operation is to join the result of two window aggregations on the same timestamp.

> However, window joins do not support equality predicates on time attributes such as {{left.time
= right.time}} but require two range predicates such as {{left.time >= right.time AND left.time
<= right.time}}.
> This can be fixed in the translation code (the operator does not have to be touched).



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