[FLINK-687] Add support for outer-joins

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Implemented
• Fix Version/s: 0.10.0
• Labels: github-import
• Assignee: Ricky Pogalz
• Reporter: GitHub Import
• Created: 09/Jun/14 12:46
• Updated: 09/Oct/15 16:52
• Resolved: 09/Oct/15 16:52

Description

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
Labels: enhancement, java api, runtime,
Created at: Mon Apr 14 12:09:00 CEST 2014
State: open

Sub-Tasks

• Implement Sort-Merge Outer Join algorithm: Closed
• Add outer joins to Runtime: Closed
• Add outer joins to API and Optimizer: Closed