private boolean isComplexField(SamzaSqlFieldType fieldtype) {
    return fieldtype == SamzaSqlFieldType.ARRAY || fieldtype == SamzaSqlFieldType.MAP
        || fieldtype == SamzaSqlFieldType.ROW;
  }
Handles the given command
@param command input {@link CliCommand} to handle
@return false if command is to quit, or fatal error happened that Shell should not continue running. True o.w.
@throws CommandHandlerException if unrecoverable error happened while handling the input {@link CliCommand}
samza-sql-shell/src/main/java/org/apache/samza/sql/client/impl/CliCommandHandler.java