@Explain(displayName = "properties", explainLevels = { Level.DEFAULT, Level.USER, Level.EXTENDED })
  public Map<String, String> getOpPropsWithStorageHandlerProps() {
    HiveStorageHandler storageHandler = tableMetadata.getStorageHandler();
    return storageHandler == null
            ? opProps
            : storageHandler.getOperatorDescProperties(this, opProps);
  }
A boolean variable set to true by the semantic analyzer only in case of the analyze command.
ql/src/java/org/apache/hadoop/hive/ql/plan/TableScanDesc.java