Merge pull request #2050 from eclipse/GH-2048-remove-commented-code

GH-2048 remove code that has been commented out

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/impl/QueryJoinOptimizer.java

@@ -30,7 +30,7 @@
 
 /**
  * A query optimizer that re-orders nested Joins.
- * 
+ *
  * @author Arjohn Kampman
  * @author James Leigh
  */
@@ -48,7 +48,7 @@ public QueryJoinOptimizer(EvaluationStatistics statistics) {
 
  /**
  * Applies generally applicable optimizations: path expressions are sorted from more to less specific.
- * 
+ *
  * @param tupleExpr
  */
  @Override
@@ -231,17 +231,17 @@ protected List<TupleExpr> getSubSelects(List<TupleExpr> expressions) {
  * maximized.
  * <p>
  * Example: reordering
- * 
+ *
  * <pre>
  * [f] [a b c] [e f] [a d] [b e]
  * </pre>
- * 
+ *
  * should result in:
- * 
+ *
  * <pre>
  * [a b c] [a d] [b e] [e f] [f]
  * </pre>
- * 
+ *
  * @param subselects the original ordering of expressions
  * @return the optimized ordering of expressions
  */
@@ -421,13 +421,6 @@ protected double getTupleExprCardinality(TupleExpr tupleExpr, Map<TupleExpr, Dou
  }
  }
 
- // Prefer patterns that bind more variables
- // List<Var> distinctUnboundVars = getUnboundVars(new
- // HashSet<Var>(vars));
- // if (distinctUnboundVars.size() >= 2) {
- // cardinality /= distinctUnboundVars.size();
- // }
-
  return cardinality;
  }