flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Chiwan Park (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-687) Add support for outer-joins
Date Thu, 28 May 2015 14:19:31 GMT

    [ https://issues.apache.org/jira/browse/FLINK-687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14562937#comment-14562937
] 

Chiwan Park commented on FLINK-687:
-----------------------------------

[~r-pogalz] Okay. You can take this issue. :) I don't start work about the sort-merge based
outer join. If there is a chance after the sort-merge based outer join, I would like to implement
the hash-join based outer join.

> Add support for outer-joins
> ---------------------------
>
>                 Key: FLINK-687
>                 URL: https://issues.apache.org/jira/browse/FLINK-687
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: GitHub Import
>            Assignee: Chiwan Park
>            Priority: Minor
>              Labels: github-import
>             Fix For: pre-apache
>
>
> There are three types of outer-joins:
> - left outer,
> - right outer, and
> - full outer
> joins.
> An outer-join does not "filter" tuples of the outer-side that do not find a matching
tuple on the other side. Instead, it is joined with a NULL value.
> Supporting outer-joins requires some modifications in the join execution strategies.
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/stratosphere/stratosphere/issues/687
> Created by: [fhueske|https://github.com/fhueske]
> Labels: enhancement, java api, runtime, 
> Created at: Mon Apr 14 12:09:00 CEST 2014
> State: open



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message