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Posted to issues@flink.apache.org by "Fabian Hueske (JIRA)" <ji...@apache.org> on 2015/02/08 00:40:35 UTC
[jira] [Updated] (FLINK-687) Add support for outer-joins
[ https://issues.apache.org/jira/browse/FLINK-687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Fabian Hueske updated FLINK-687:
--------------------------------
Priority: Minor (was: Major)
> 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
> 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
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