diff --git a/utility/ExecutionDAGVisualizer.cpp b/utility/ExecutionDAGVisualizer.cpp
index 2dc6976..7c319f5 100644
--- a/utility/ExecutionDAGVisualizer.cpp
+++ b/utility/ExecutionDAGVisualizer.cpp
@@ -154,7 +154,7 @@
         std::string input_stored_relation_names;
         std::size_t num_input_stored_relations = 0;
         for (const auto &input_relation : union_all_op.input_relations()) {
-          if (!input_relation->isTemporary()) {
+          if (input_relation->isTemporary()) {
             continue;
           }
           ++num_input_stored_relations;