diff --git be/src/runtime/types.cc be/src/runtime/types.cc
index 6d9b947..469840a 100644
--- be/src/runtime/types.cc
+++ be/src/runtime/types.cc
@@ -50,7 +50,7 @@ ColumnType::ColumnType(const std::vector<TTypeNode>& types, int* idx)
       for (int i = 0; i < node.struct_fields.size(); ++i) {
         ++(*idx);
         children.push_back(ColumnType(types, idx));
-        field_names.push_back(node.struct_fields[i].name);
+        //field_names.push_back(node.struct_fields[i].name);
       }
       break;
     case TTypeNodeType::ARRAY:
diff --git be/src/runtime/types.h be/src/runtime/types.h
index f624d34..a44213b 100644
--- be/src/runtime/types.h
+++ be/src/runtime/types.h
@@ -85,7 +85,7 @@ struct ColumnType {
   std::vector<ColumnType> children;
 
   /// Only set if type == TYPE_STRUCT. The field name of each child.
-  std::vector<std::string> field_names;
+  //std::vector<std::string> field_names;
 
   ColumnType(PrimitiveType type = INVALID_TYPE)
     : type(type), len(-1), precision(-1), scale(-1) {
diff --git be/src/util/debug-util.cc be/src/util/debug-util.cc
index ceb7fbe..25ae4d2 100644
--- be/src/util/debug-util.cc
+++ be/src/util/debug-util.cc
@@ -257,7 +257,7 @@ string PrintPath(const TableDescriptor& tbl_desc, const SchemaPath& path) {
         break;
       case TYPE_STRUCT:
         DCHECK_LT(path[i], type->children.size());
-        ss << type->field_names[path[i]];
+        //ss << type->field_names[path[i]];
         type = &type->children[path[i]];
         break;
       default: