====== Tables, Indexes, Objects ======

===== Locks =====
**DML**
<sxh bash>
TX-row lock
TM-lock
</sxh>

**DDL**
<sxh bash>
Exclusive
Shared
Brakeable
</sxh>

**Internal**
<sxh bash>
Latch -> search for execution plan
Enqueue -> search for redo log buffer and redo log files
Mutex -> search/modify execution plans
</sxh>

**Query the locks : **
<sxh sql>
SET ECHO off
REM NAME:   TFSCLOCK.SQL
REM USAGE:"@path/tfsclock"
REM ------------------------------------------------------------------------
REM REQUIREMENTS:
REM    SELECT on V$LOCK, V$SESSION, SYS.USER$, SYS.OBJ$
REM ------------------------------------------------------------------------
REM PURPOSE:
REM    The following locking information script provides fully DECODED
REM    information regarding the locks currently held in the database.
REM    The report generated is fairly complex and difficult to read,
REM    but has considerable detail.
REM
REM    The TFTS series contains scripts to provide (less detailed) lock 
REM  information in a formats which are somewhat less difficult to read:
REM    TFSMLOCK.SQL and TFSLLOCK.SQL.
REM ------------------------------------------------------------------------
REM EXAMPLE:
REM    Too complex to show a representative sample here
REM 
REM ------------------------------------------------------------------------
REM DISCLAIMER:
REM    This script is provided for educational purposes only. It is NOT 
REM    supported by Oracle World Wide Technical Support.
REM    The script has been tested and appears to work as intended.
REM    You should always run new scripts on a test instance initially.
REM ------------------------------------------------------------------------
REM Main text of script follows:

set lines 200
set pagesize 66
spool locks
break on Kill on sid on  username on terminal
column Kill heading 'Kill String' format a13
column res heading 'Resource Type' format 999
column id1 format 9999990
column id2 format 9999990
column locking heading 'Lock Held/Lock Requested' format a40
column lmode heading 'Lock Held' format a20
column request heading 'Lock Requested' format a20
column serial# format 99999
column username  format a10  heading "Username"
column terminal heading Term format a6
column tab format a30 heading "Table Name"
column owner format a9
column LAddr heading "ID1 - ID2" format a18
column Lockt heading "Lock Type" format a40
column command format a25
column sid format 990
rem     L.SID||','||S.SERIAL# Kill,
select
nvl(S.USERNAME,'Internal') username,
        L.SID,
        nvl(S.TERMINAL,'None') terminal,
        decode(command,
0,'None',decode(l.id2,0,U1.NAME||'.'||substr(T1.NAME,1,20),'None')) tab,
decode(command,
0,'BACKGROUND',
1,'Create Table',
2,'INSERT',
3,'SELECT',
4,'CREATE CLUSTER',
5,'ALTER CLUSTER',
6,'UPDATE',
7,'DELETE',
8,'DROP',
9,'CREATE INDEX',
10,'DROP INDEX',
11,'ALTER INDEX',
12,'DROP TABLE',
13,'---',
14,'---',
15,'ALTER TABLE',
16,'---',
17,'GRANT',
18,'REVOKE',
19,'CREATE SYNONYM',
20,'DROP SYNONYM',
21,'CREATE VIEW',
22,'DROP VIEW',
23,'---',
24,'---',
25,'---',
26,'LOCK TABLE',
27,'NO OPERATION',
28,'RENAME',
29,'COMMENT',
30,'AUDIT',
31,'NOAUDIT',
32,'CREATE EXTERNAL DATABASE',
33,'DROP EXTERNAL DATABASE',
34,'CREATE DATABASE',
35,'ALTER DATABASE',
36,'CREATE ROLLBACK SEGMENT',
37,'ALTER ROLLBACK SEGMENT',
38,'DROP ROLLBACK SEGMENT',
39,'CREATE TABLESPACE',
40,'ALTER TABLESPACE',
41,'DROP TABLESPACE',
42,'ALTER SESSION',
43,'ALTER USER',
44,'COMMIT',
45,'ROLLBACK',
46,'SAVEPOINT',
47,'PL/SQL EXECUTE',
48,'SET TRANSACTION',
49,'ALTER SYSTEM SWITCH LOG',
50,'EXPLAIN',
51,'CREATE USER',
52,'CREATE ROLE',
53,'DROP USER',
54,'DROP ROLE',
55,'SET ROLE',
56,'CREATE SCHEMA',
57,'CREATE CONTROL FILE',
58,'ALTER TRACING',
59,'CREATE TRIGGER',
60,'ALTER TRIGGER',
61,'DROP TRIGGER',
62,'ANALYZE TABLE',
63,'ANALYZE INDEX',
64,'ANALYZE CLUSTER',
65,'CREATE PROFILE',
66,'DROP PROFILE',
67,'ALTER PROFILE',
68,'DROP PROCEDURE',
70,'ALTER RESOURCE COST',
71,'CREATE SNAPSHOT LOG',
72,'ALTER SNAPSHOT LOG',
73,'DROP SNAPSHOT LOG',
74,'CREATE SNAPSHOT',
75,'ALTER SNAPSHOT',
76,'DROP SNAPSHOT',
84,'-',
85,'TRUNCATE TABLE',
86,'TRUNCATE CLUSTER',
87,'-',
88,'ALTER VIEW',
89,'-',
90,'-',
91,'CREATE FUNCTION',
92,'ALTER FUNCTION',
93,'DROP FUNCTION',
94,'CREATE PACKAGE',
95,'ALTER PACKAGE',
96,'DROP PACKAGE',
97,'CREATE PACKAGE BODY',
98,'ALTER PACKAGE BODY',
99,'DROP PACKAGE BODY',
command||' - ???') COMMAND,
        decode(L.LMODE,1,'No Lock',
                2,'Row Share',
                3,'Row Exclusive',
                4,'Share',
                5,'Share Row Exclusive',
                6,'Exclusive','NONE') lmode,
        decode(L.REQUEST,1,'No Lock',
                2,'Row Share',
                3,'Row Exclusive',
                4,'Share',
                5,'Share Row Exclusive',
                6,'Exclusive','NONE') request,
l.id1||'-'||l.id2 Laddr,
l.type||' - '||
decode(l.type,
'BL','Buffer hash table instance lock',
'CF','Cross-instance function invocation instance lock',
'CI','Control file schema global enqueue lock',
'CS','Control file schema global enqueue lock',
'DF','Data file instance lock',
'DM','Mount/startup db primary/secondary instance lock',
'DR','Distributed recovery process lock',
'DX','Distributed transaction entry lock',
'FI','SGA open-file information lock',
'FS','File set lock',
'IR','Instance recovery serialization global enqueue lock',
'IV','Library cache invalidation instance lock',
'MB','Master buffer hash table instance lock',
'MM','Mount definition gloabal enqueue lock',
'MR','Media recovery lock',
'RE','USE_ROW_ENQUEUE enforcement lock',
'RT','Redo thread global enqueue lock',
'RW','Row wait enqueue lock',
'SC','System commit number instance lock',
'SH','System commit number high water mark enqueue lock',
'SN','Sequence number instance lock',
'SQ','Sequence number enqueue lock',
'ST','Space transaction enqueue lock',
'SV','Sequence number value lock',
'TA','Generic enqueue lock',
'TD','DDL enqueue lock',
'TE','Extend-segment enqueue lock',
'TM','DML enqueue lock',
'TT','Temporary table enqueue lock',
'TX','Transaction enqueue lock',
'UL','User supplied lock',
'UN','User name lock',
'WL','Being-written redo log instance lock',
'WS','Write-atomic-log-switch global enqueue lock',
'TS',decode(l.id2,0,'Temporary segment enqueue lock (ID2=0)',
                    'New block allocation enqueue lock (ID2=1)'),
'LA','Library cache lock instance lock (A=namespace)',
'LB','Library cache lock instance lock (B=namespace)',
'LC','Library cache lock instance lock (C=namespace)',
'LD','Library cache lock instance lock (D=namespace)',
'LE','Library cache lock instance lock (E=namespace)',
'LF','Library cache lock instance lock (F=namespace)',
'LG','Library cache lock instance lock (G=namespace)',
'LH','Library cache lock instance lock (H=namespace)',
'LI','Library cache lock instance lock (I=namespace)',
'LJ','Library cache lock instance lock (J=namespace)',
'LK','Library cache lock instance lock (K=namespace)',
'LL','Library cache lock instance lock (L=namespace)',
'LM','Library cache lock instance lock (M=namespace)',
'LN','Library cache lock instance lock (N=namespace)',
'LO','Library cache lock instance lock (O=namespace)',
'LP','Library cache lock instance lock (P=namespace)',
'LS','Log start/log switch enqueue lock',
'PA','Library cache pin instance lock (A=namespace)',
'PB','Library cache pin instance lock (B=namespace)',
'PC','Library cache pin instance lock (C=namespace)',
'PD','Library cache pin instance lock (D=namespace)',
'PE','Library cache pin instance lock (E=namespace)',
'PF','Library cache pin instance lock (F=namespace)',
'PG','Library cache pin instance lock (G=namespace)',
'PH','Library cache pin instance lock (H=namespace)',
'PI','Library cache pin instance lock (I=namespace)',
'PJ','Library cache pin instance lock (J=namespace)',
'PL','Library cache pin instance lock (K=namespace)',
'PK','Library cache pin instance lock (L=namespace)',
'PM','Library cache pin instance lock (M=namespace)',
'PN','Library cache pin instance lock (N=namespace)',
'PO','Library cache pin .
instance lock (O=namespace)',
'PP','Library cache pin instance lock (P=namespace)',
'PQ','Library cache pin instance lock (Q=namespace)',
'PR','Library cache pin instance lock (R=namespace)',
'PS','Library cache pin instance lock (S=namespace)',
'PT','Library cache pin instance lock (T=namespace)',
'PU','Library cache pin instance lock (U=namespace)',
'PV','Library cache pin instance lock (V=namespace)',
'PW','Library cache pin instance lock (W=namespace)',
'PX','Library cache pin instance lock (X=namespace)',
'PY','Library cache pin instance lock (Y=namespace)',
'PZ','Library cache pin instance lock (Z=namespace)',
'QA','Row cache instance lock (A=cache)',
'QB','Row cache instance lock (B=cache)',
'QC','Row cache instance lock (C=cache)',
'QD','Row cache instance lock (D=cache)',
'QE','Row cache instance lock (E=cache)',
'QF','Row cache instance lock (F=cache)',
'QG','Row cache instance lock (G=cache)',
'QH','Row cache instance lock (H=cache)',
'QI','Row cache instance lock (I=cache)',
'QJ','Row cache instance lock (J=cache)',
'QL','Row cache instance lock (K=cache)',
'QK','Row cache instance lock (L=cache)',
'QM','Row cache instance lock (M=cache)',
'QN','Row cache instance lock (N=cache)',
'QO','Row cache instance lock (O=cache)',
'QP','Row cache instance lock (P=cache)',
'QQ','Row cache instance lock (Q=cache)',
'QR','Row cache instance lock (R=cache)',
'QS','Row cache instance lock (S=cache)',
'QT','Row cache instance lock (T=cache)',
'QU','Row cache instance lock (U=cache)',
'QV','Row cache instance lock (V=cache)',
'QW','Row cache instance lock (W=cache)',
'QX','Row cache instance lock (X=cache)',
'QY','Row cache instance lock (Y=cache)',
'QZ','Row cache instance lock (Z=cache)','????') Lockt
from    V$LOCK L, 
        V$SESSION S,
        SYS.USER$ U1,
        SYS.OBJ$ T1
where   L.SID = S.SID 
and     T1.OBJ#  = decode(L.ID2,0,L.ID1,1) 
and     U1.USER# = T1.OWNER#
and     S.TYPE != 'BACKGROUND'
order by 1,2,5
/
rem DL, Direct Loader Index Creation
rem IN, Instance Number
rem IS, Instance State
rem KK, Redo Log "Kick"
rem PF, Password File
rem PI, Parallel Slaves
rem PR, Process Startup
rem PS, Parallel Slave Synchronization
rem SM, SMON
rem TS, Temporary Segment (also TableSpace); 
</sxh>

**Kill the blocking sessions :**
<sxh sql>
select l1.INST_ID,
 'ALTER SYSTEM KILL SESSION '||''''||l1.sid||','||a.serial#||''''||' IMMEDIATE;'  Kill_String ,
 a.SQL_ID, 
 a.USERNAME, 
 ' IS BLOCKING ', 
 l2.INST_ID , 
 l2.sid,
 b.serial#,
 b.SQL_ID,
 b.USERNAME 
from gv$lock l1, gv$lock l2, gv$session a, gv$session b 
where l1.block =1 
and l2.request > 0 
and l1.id1=l2.id1 
and l1.id2=l2.id2 
and a.SID=l1.sid and b.SID=l2.sid; 
</sxh>

===== Objects =====

=== Invalid objects ===
== List invalid objects ==
<sxh sql>
col object_name for a30
col object_type for a30
set lines 200
set pages 500
select owner, object_name, object_type, status from dba_objects where status <>'VALID' order by 1,2; 
</sxh>

== Recompile invalid objects ==
<sxh sql>
select 'alter function '||owner||'.'||object_name||' compile;' from dba_objects where status<>'VALID' and object_type='FUNCTION';
select 'alter view '||owner||'.'||object_name||' compile;' from dba_objects where status<>'VALID' and object_type='VIEW';
select 'alter type '||owner||'.'||object_name||' compile;' from dba_objects where status<>'VALID' and object_type='TYPE';
select 'alter trigger '||owner||'.'||object_name||' compile;' from dba_objects where status<>'VALID' and object_type='TRIGGER';
select 'alter procedure '||owner||'.'||object_name||' compile;' from dba_objects where status<>'VALID'  and object_type='PROCEDURE';
select 'alter package '||owner||'.'||object_name||' compile body;' from dba_objects where status<>'VALID'  and object_type='PACKAGE BODY';
select 'alter public synonym '||object_name||' compile;' from dba_objects where status <>'VALID' and owner='PUBLIC';
select 'alter synonym '||owner||'.'||object_name||' compile;' from dba_objects where status <>'VALID' and object_type='SYNONYM'; 
</sxh>


Indexes:

[[https://richardfoote.files.wordpress.com/2007/12/index-internals-rebuilding-the-truth-ii.pdf]]
[[https://oradbaeasy.wordpress.com/2009/06/01/how-to-determine-an-index-needs-to-be-rebuilt/]]