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Ricky Pogalz commented on FLINK-687: ------------------------------------ Hi, during the project course IMPRO3 at TU-Berlin we planned to work on this operator as a bigger task in the next weeks. Unfortunately, I just recognized that this parent issue is already assigned, but not the subtasks though. [~chiwanpark] Are you about to work on the sort-merge based outer join or is it okay for you if we take this issue? > 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)