Made the join of two optional results optional. Fixes #278

ad-freiburg · Sep 14, 2019 · da175c7 · da175c7
1 parent afcb9f7
commit da175c7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/engine/QueryPlanner.cpp b/src/engine/QueryPlanner.cpp
@@ -2070,6 +2070,7 @@ QueryPlanner::SubtreePlan QueryPlanner::optionalJoin(
   tree.setVariableColumns(join->getVariableColumns());
   tree.setOperation(QueryExecutionTree::OPTIONAL_JOIN, join);
 
+  plan._isOptional = a._isOptional && b._isOptional;
   return plan;
 }