default void appendFiles(Table tbl, URI fromURI, boolean isOverwrite, Map<String, String> partitionSpec)
      throws SemanticException {
    throw new SemanticException(ErrorMsg.LOAD_INTO_NON_NATIVE.getMsg());
  }
Appends files to the table
@param tbl the table object.
@param fromURI the source of files.
@param isOverwrite whether to overwrite the existing table data.
@param partitionSpec the partition spec.
@throws SemanticException in case of any error
ql/src/java/org/apache/hadoop/hive/ql/metadata/HiveStorageHandler.java