neo4j/neo4j — pull request #3144 by systay (2014-09-24 13:08:00+00:00)
Title: [2.2] Update planning of optional match in Ronja

Before this change, planning of OPTIONAL MATCH
was done as if order between these clauses was
not important. This change respects the order
of the clauses, and simplifies which operators
are used in solving them.