查詢被鎖的表 ，解鎖

--查詢被鎖的表 

--查詢被鎖的表 

select a.sid, b.serial#, 
decode(a.type, 
'mr', 'media recovery', 
'rt','redo thread', 
'un','user name', 
'tx', 'transaction', 
'tm', 'dml', 
'ul', 'pl/sql user lock', 
'dx', 'distributed xaction', 
'cf', 'control file', 
'is', 'instance state', 
'fs', 'file set', 
'ir', 'instance recovery', 
'st', 'disk space transaction', 
'ts', 'temp segment', 
'iv', 'library cache invalida-tion', 
'ls', 'log start or switch', 
'rw', 'row wait', 
'sq', 'sequence number', 
'te', 'extend table', 
'tt', 'temp table', 
'unknown') locktype, 
c.object_name, 
b.username, 
b.osuser, 
decode(a.lmode, 0, 'none', 
1, 'null', 
2, 'row-s', 
3, 'row-x', 
4, 'share', 
5, 's/row-x', 
6, 'exclusive', 'unknown') lockmode, 
b.machine,d.spid 
from v$lock a,v$session b,all_objects c,v$process d 
where a.sid=b.sid and a.type in ('tm','tx') 
and c.object_id=a.id1 
and b.paddr=d.addr ;

--行級鎖

select /*+ rule */
s.username,
decode(l.type, 'tm', 'table lock', 'tx', 'row lock', null) lock_level,
o.owner,
o.object_name,
o.object_type,
s.sid,
s.serial#,
s.terminal,
s.machine,
s.program,
s.osuser
from v$session s, v$lock l, dba_objects o
where l.sid = s.sid
and l.id1 = o.object_id(+)
and s.username is not null ;

alter system kill session 'sid,serial#' ;

alter system kill session '4450,26459' ;

analyze table ***xx  compute statistics;

select /*+ ordered */ 

sql_text
from v$sqltext a
where (a.hash_value, a.address) in
(select decode(sql_hash_value, 0, prev_hash_value, sql_hash_value),
decode(sql_hash_value, 0, prev_sql_addr, sql_address)
from v$session b
where b.sid = '7') /* 此處67 為sid*/
order by piece asc;

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