'drush @platform.-sql sql-conf' problem

root@i-ching:/var/www/html/latinamericajourneys/_www#  drush @y.prod sql-conf
Array
(
    [database] => alice
    [username] => admin75KqrXl
    [host] => localhost
    [port] => 
    [driver] => mysql
    [prefix] => 
)

root@i-ching:/var/www/html/latinamericajourneys/_www# drush @platform._local sql-conf
Unable to load class Drush\Sql\Sql                         [error]
exception 'Drush\Sql\SqlException' with message 'Unable    [error]
to find a matching SQL Class. Drush cannot find your
database connection details.' in
/root/.composer/vendor/drush/drush/commands/sql/sql.drush.inc:588
Stack trace:
#0
/root/.composer/vendor/drush/drush/commands/sql/sql.drush.inc(220):
drush_sql_get_class()
#1 [internal function]: drush_sql_conf()
#2
/root/.composer/vendor/drush/drush/includes/command.inc(366):
call_user_func_array('drush_sql_conf', Array)
#3
/root/.composer/vendor/drush/drush/includes/command.inc(217):
_drush_invoke_hooks(Array, Array)
#4 [internal function]: drush_command()
#5
/root/.composer/vendor/drush/drush/includes/command.inc(185):
call_user_func_array('drush_command', Array)
#6
/root/.composer/vendor/drush/drush/lib/Drush/Boot/BaseBoot.php(67):
drush_dispatch(Array)
#7
/root/.composer/vendor/drush/drush/includes/preflight.inc(66):
Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#8 /root/.composer/vendor/drush/drush/drush.php(12):
drush_main()
#9 {main}
root@i-ching:/var/www/html/latinamericajourneys/_www#