Method reset_query_inner

sql/sql_class.h:1908–1911

    set_query_inner(CSET_STRING(query_arg, query_length_arg, cs_arg));
  }
  void reset_query_inner()
  {
    set_query_inner(CSET_STRING());
  }
  cf_flags_t sql_command_flags() const
  {
    return ::sql_command_flags[lex->sql_command];