SELECT n.nspname, 
       i.relname, 
       i.indexrelname, 
       CASE WHEN idx.indisprimary 
            THEN 'pkey' 
            WHEN idx.indisunique 
            THEN 'uidx' 
            ELSE 'idx' 
        END AS type, 
        'INVALID' 
  FROM pg_stat_all_indexes i 
  JOIN pg_class c     ON (c.oid = i.relid) 
  JOIN pg_namespace n ON (n.oid = c.relnamespace) 
  JOIN pg_index idx   ON (idx.indexrelid =  i.indexrelid ) 
 WHERE idx.indisvalid = FALSE  
 ORDER BY 1, 2;