查詢(xún)鎖表:SELECT l.session_id sid,
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? s.serial#,
? l.locked_mode,
? l.oracle_username,
? l.os_user_name,
? s.machine,
? s.terminal,
? o.object_name,
? s.logon_time FROM? v$locked_object l,
? all_objects? ? ? o,
? v$session? ? ? ? s WHERE l.object_id = o.object_id ANd l.session_id = s.sid ORDER BY sid,
? s.serial#;
解鎖:ALTER system KILL session 'sid,serial#';
查詢(xún)鎖住原因:SELECT b.sid oracleID,b.username 登錄Oracle用戶(hù)名,b.serial#,spid 操作系統(tǒng)ID,paddr,?
sql_text 正在執(zhí)行的SQL,b.machine 計(jì)算機(jī)名 FROM v$process a, v$session b, v$sqlarea c?
WHERE a.addr = b.paddr AND b.sql_hash_value = c.hash_value? and b.USERNAME='FKPHIS24';
在對(duì)指定表做append操作,其他再做truncate時(shí)候,會(huì)產(chǎn)生鎖表,如下驗(yàn)證步驟,
1、創(chuàng)建測(cè)試表,
create table test_lock(id number, value varchar2(200));
2、執(zhí)行append語(yǔ)句;并且不做提交,insert /*+append*/ into test_lock values(1,1);
3、再次執(zhí)行清表語(yǔ)句,truncate table test_lock;報(bào)鎖表錯(cuò)誤,
4、查看鎖表語(yǔ)句,發(fā)現(xiàn)被鎖表,
select b.object_name, t.*
from v$locked_object t, user_objects b
where t.object_id = b.object_id
查詢(xún)鎖表
select object_name, machine, s.sid, s.serial#
from v$locked_object l, dba_objects o, v$session s
where l.object_id = o.object_id
and l.session_id = s.sid;
解表
ALTER system kill session 'sid, serial#';
ALTER system kill session '256, 34034';
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