wip

Author: hmottestad

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/optimizer/ExistsSemiJoinOptimizer.java

@@ -201,6 +201,10 @@ public void meet(Var node) {
 				}
 			}
 		});
+		Map<String, String> aliases = collectAliasMap(expr);
+		if (!aliases.isEmpty()) {
+			names.addAll(aliases.keySet());
+		}
 		return names;
 	}
 

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/optimizer/NotExistsSemiJoinOptimizer.java

@@ -202,6 +202,10 @@ public void meet(Var node) {
 				}
 			}
 		});
+		Map<String, String> aliases = collectAliasMap(expr);
+		if (!aliases.isEmpty()) {
+			names.addAll(aliases.keySet());
+		}
 		return names;
 	}
 

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/optimizer/SparqlUoOptimizer.java

@@ -55,6 +55,7 @@ public SparqlUoOptimizer(EvaluationStatistics evaluationStatistics) {
 	public SparqlUoOptimizer(EvaluationStatistics evaluationStatistics, boolean allowNonImprovingTransforms) {
 		this(evaluationStatistics, SparqlUoConfig.builder()
 				.allowNonImprovingTransforms(allowNonImprovingTransforms)
+				.enableUnionCommonPrefixPullUp(allowNonImprovingTransforms)
 				.build());
 	}