docs: @Override
      public boolean isOrderDeterministic() {
          if ( ! super.isOrderDeterministic()) {
              return false;
          }
          IndexScanPlanNode index_scan = getInlineIndexScan();
          if ( ! index_scan.isOrderDeterministic()) {
              m_nondeterminismDetail = index_scan.m_nondeterminismDetail;
              return false;
          }
          return true;
      }