apache/incubator-flink — pull request #29 by skunert (2014-06-19 14:04:56+00:00)
Title: SemanticProperties for Projections

This PR deals with
https://issues.apache.org/jira/browse/FLINK-932

ProjectionJoins, Crosses and the regular project operator get their SemanticProperties generated automatically. Additionally, I disables withConstantSet() for ProjectJoins and Crosses because it can cause conflicts.