rdatt (1) --- list the attributes of a relation 07/01/82 | _U_s_a_g_e | rdatt {} | ::= -t | -l | -n | _D_e_s_c_r_i_p_t_i_o_n | 'Rdatt' is part of the toy relational data base system, | 'rdb'. It lists the attributes of a relation, specified as | standard input, on standard output. The input relation must | be a file containing a relation that was created by 'rdmake' | or another 'rdb' program; a relation cannot be read from the | terminal. | If no options are specified then the type, length, and name | of each attribute are listed on one line for each attribute. | If any of the options 't', 'l', or 'n' (type, length, name) | are specified, then only the characteristics corresponding | to the requested option will be listed. | _E_x_a_m_p_l_e_s | p1.rel> rdatt | p2.rel> rdatt -tn >attrlist | _M_e_s_s_a_g_e_s | "Sorry, a relation can't be read from the terminal" | "Can't access input relation" | "relation is corrupted!!" | _S_e_e _A_l_s_o | rdcat (1), rdextr (1), rdjoin (1), rdmake (1), rdprint (1), | rdproj (1), rdsel (1), rdsort (1), rduniq (1) rdatt (1) - 1 - rdatt (1)