Search notes:

X$KGLOB

Kernel Generic Libraray Cache Mananger (KGL): All Objects?
select
   ob.kglnaown    ob_owner,     -- Can be null. Also found: $BUILD$
   ob.kglobtyd    ob_type,
   ob.kglnaobj    ob_name,      -- ??
   ob.kglhdnsd    "namespace?",
   ob.kglobts0,
   ob.kglobts5,
   ob.kglobtt0 
from
   x$kglob ob;

Column KGLHDADR

The value of the column kglhdadr identifies each record in x$kglob, the following query returns 1:
select
   max(count(*))
from
   x$kglob
group by
   kglhdadr;
This column can be joined to the columns kglrfhdl and kglhdadr in x$kgldp.

Namespaces

select   
   count(*)       cnt,
   ob.kglhdnsp    name_space_id,
   ob.kglhdnsd    name_space_text
from
   x$kglob ob
group by
   ob.kglhdnsp,
   ob.kglhdnsd
order by
   ob.kglhdnsd;

Other queries

select
-- count(*),
   case when nvl(
      lag( kglobtyd ) over (order by  kglobtyd, kglhdnsd),
      'n/a'
   ) <> kglobtyd then
        kglobtyd
   end                       kglobtyd_,
   kglhdnsd   
from
   x$kglob
group by
   kglobtyd,
   kglhdnsd   
order by
   kglobtyd,
   kglhdnsd
;

--
-- KGLOBTYD_                           KGLHDNSD                                                                                                                        
-- ----------------------------------- --------------------------------------------------------------------------------------------------------------------------------
-- CLUSTER                             CLUSTER                                                                                                                         
-- CURSOR                              BODY                                                                                                                            
--                                     DBINSTANCE                                                                                                                      
--                                     DBLINK                                                                                                                          
--                                     OPTIMIZER DIRECTIVE OWNER                                                                                                       
--                                     OPTIMIZER EXPRESSION OBJECT                                                                                                     
--                                     SCHEDULER GLOBAL ATTRIBUTE                                                                                                      
--                                     SCHEMA                                                                                                                          
--                                     SQL AREA                                                                                                                        
--                                     SQL AREA BUILD                                                                                                                  
--                                     TABLE/PROCEDURE                                                                                                                 
-- CURSOR STATS                        SQL AREA STATS                                                                                                                  
-- DIRECTORY                           DIRECTORY                                                                                                                       
-- EDITION                             EDITION                                                                                                                         
-- FUNCTION                            TABLE/PROCEDURE                                                                                                                 
-- HINTSET OBJECT                      HINTSET OBJECT                                                                                                                  
-- INDEX                               INDEX                                                                                                                           
-- LIBRARY                             TABLE/PROCEDURE                                                                                                                 
-- MULTI-VERSIONED OBJECT              MULTI-VERSION OBJECT FOR INDEX                                                                                                  
--                                     MULTI-VERSION OBJECT FOR TABLE                                                                                                  
-- NONE                                SCHEMA                                                                                                                          
-- OPERATOR                            TABLE/PROCEDURE                                                                                                                 
-- Optimizer Directive Owner           OPTIMIZER DIRECTIVE OWNER                                                                                                       
-- Optimizer Expresion Object          OPTIMIZER EXPRESSION OBJECT                                                                                                     
-- Optimizer Expression Header         OPTIMIZER EXPRESSION HEADER                                                                                                     
-- Optimizer Finding                   OPTIMIZER FINDING                                                                                                               
-- PACKAGE                             TABLE/PROCEDURE                                                                                                                 
-- PACKAGE BODY                        BODY                                                                                                                            
-- QUEUE                               QUEUE                                                                                                                           
-- RESOURCE MANAGER CONSUMER GROUP     RESOURCE MANAGER                                                                                                                
-- RULESET                             RULESET                                                                                                                         
-- RUNTIME STATISTICS                  RUNTIME STATISTICS                                                                                                              
-- SCHEDULER CLASS                     TABLE/PROCEDURE                                                                                                                 
-- SCHEDULER GLOBAL ATTRIBUTE          SCHEDULER GLOBAL ATTRIBUTE                                                                                                      
-- SCHEDULER JOB                       TABLE/PROCEDURE                                                                                                                 
-- SCHEDULER WINDOW                    TABLE/PROCEDURE                                                                                                                 
-- SEQUENCE                            TABLE/PROCEDURE                                                                                                                 
-- SQL TUNING BASE OBJECT              SQL TUNING BASE OBJECT                                                                                                          
-- SYNONYM                             TABLE/PROCEDURE                                                                                                                 
-- TABLE                               TABLE/PROCEDURE                                                                                                                 
-- TYPE                                TABLE/PROCEDURE                                                                                                                 
-- TYPE BODY                           BODY                                                                                                                            
-- USER PRIVILEGES                     USER PRIVILEGE                                                                                                                  
-- VIEW                                TABLE/PROCEDURE       
select
-- count(*) over (partition by L1.kglhdadr) cnt_L1,   
   L1.kglhdadr, -- L1.kglhdpar,
   L2.kglhdadr, -- L2.kglhdpar,
 --L3.kglhdadr,    L3.kglhdpar,
   L1.kglobtyd,    L1.kglhdnsd,
-- L2.kglobtyd,    L2.kglhdnsd,
   L1.kglnaobj,
   L2.kglnaobj,
   L3.kglobtyd
from
   x$kglob  L1                                                                left join
   x$kglob  L2  on L1.kglhdadr  = L2.kglhdpar and
                   L1.kglhdadr  = L2.kglhdpar and
                   L2.kglhdpar != L2.kglhdadr                                 left join
   x$kglob  L3  on L2.kglhdadr  = L3.kglhdpar and L2.kglhdpar != L3.kglhdadr   
;   

Columns KGLNAOBJ vs. KGLFNOBJ

The column kglnaobj is a varchar2(1000), kglfnobj a clob.
Thus, kglnaobj can be used to search for an object (select * from x$kglob where kglnaobj like 'select abc from …);
select
   max(length(kglnaobj)), -- likely to be 1000
   max(length(kglfnobj))  -- likely to exceed 1000
from
   x$kglob;

See also

Fixed tables
$ORACLE_HOME/rdbms/admin/utldtree.sql

Index