Remove subqueries from QueryGraph by introducing a lookup table for subqueries and an optional field for optional match
Fix: ronja should fail if there are more than a single predicate expression in or in a where clause
Merge pull request #2371 from davidegrohmann/pattern-predicates

Remove subqueries from query graph
Allow Ronja to handle WITH
Inline projections even in the presence of SKIP and LIMIT
Merge pull request #2378 from jakub-/queryplan

Allow Ronja to handle WITH
Refactoring of QueryPlan construction

Moved all QueryPlan producers into an object - QueryPlanProducer
Merge pull request #2383 from systay/queryplanproducer

Refactoring of QueryPlan construction
Cypher vs SQL chapter.