rubygems_development=# SELECT count(*) FROM linksets where code != '' ;
 count 
-------
 17306
(1 row)

rubygems_development=# SELECT count(*) FROM linksets where code = '' ;
 count 
-------
  1422
(1 row)

rubygems_development=# SELECT count(*) FROM linksets  ;
 count  
--------
 162102
(1 row)