Postgresql \z grant question - Mailing list pgsql-admin

Hello everyone,

in Postgresql  RDBMS ,
how can i  get   informations   about    acces  permissions on existing objects
?

I alredy know that     (  psql  \z )        do  this ;
but     'w'   means    update OR  delete  !      (it's not the  same thing)


can someone  , please, tell me if  it is possible  ?

thanks a lot