[
https://issues.apache.org/jira/browse/FLINK-875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Stephan Ewen resolved FLINK-875.
--------------------------------
Resolution: Fixed
Fix Version/s: (was: pre-apache)
0.6-incubating
Assignee: Stephan Ewen
Fixed alongside [FLINK-935] in commit ca2b287a7a78328ebf43766b9fdf39b56fb5fd4f
> Optimizer introduces Unnecessary Sort in Iterations
> ---------------------------------------------------
>
> Key: FLINK-875
> URL: https://issues.apache.org/jira/browse/FLINK-875
> Project: Flink
> Issue Type: Improvement
> Reporter: GitHub Import
> Assignee: Stephan Ewen
> Labels: github-import
> Fix For: 0.6-incubating
>
>
> There is a Bug in the Optimizer that introduces an unnecessary sort. You ran
> reproduce the Bug by taking the "PageRankBasic" example program and adding an
> `@ConstantFields("0")` annotation to the `Dampener` MapFunction.
> The produced plan is shown below. The sort is unnecessary since the join
> algorithm is a hash join.
> ![opt_bug_screenshot|https://cloud.githubusercontent.com/assets/1727146/3092106/8f003ade-e5a5-11e3-8d5e-2c96beef3bb9.png]
> ---------------- Imported from GitHub ----------------
> Url: https://github.com/stratosphere/stratosphere/issues/875
> Created by: [StephanEwen|https://github.com/StephanEwen]
> Labels: enhancement, optimizer,
> Created at: Tue May 27 15:48:48 CEST 2014
> State: open
--
This message was sent by Atlassian JIRA
(v6.2#6252)
