抓取锁的sql语句-第七次修改

最近闲来没事，把之前写的那个抓取锁的存储过程重新修改、优化了一下，呵呵

create or replace procedure solve_lock_061203_wanjie(v_msg out varchar2)

as

v_sql varchar2(3000); --定义 v_sql 接受抓取锁的sql语句

kill_sid number;
kill_serial number;

cur_lock sys_refcursor; --定义游标变量，循环执行抓取锁的sql语句
cur_lock02 sys_refcursor;

type tp_lock is record( --定义 record类型的 变量
v_sid number,
v_type varchar2(10),
v_id1 number,
v_id2 number,
v_lmode varchar2(200),
v_request varchar2(200),
v_lock_time number,
v_block number);
records_lock tp_lock;

type tp_lock02 is record(
waiting_sid number,
waiting_sql varchar2(1000),
blocker_event varchar2(1000),
blocking_sid number,
blocking_sql varchar2(1000));
records_lock02 tp_lock02;

v_blocking_sid number;
v_waiting_sid number;

begin
v_msg := '';
v_sql := '';

v_msg := v_msg ||
lpad(rpad('查找数据库中是否有锁阻塞、锁等待的情况', 60, '-'),
81,
'-') || chr(10);

v_sql := 'select sid,type,id1,id2,
decode(lmode,0, ''none'',1,''null'', 2, ''row share'' ,3, ''row exclusive'' ,4, ''share'' ,5, ''share row exclusive'' ,6 ,''exclusive'' ,''null'') lock_type,
decode(request,0, ''none'',1,''null'', 2, ''row share'' ,3, ''row exclusive'' ,4, ''share'' ,5, ''share row exclusive'' ,6 ,''exclusive'' ,''hull'') lock_request,
ctime,block from v$lock where type in (''TM'',''TX'')';

open cur_lock for v_sql;
loop
fetch cur_lock
into records_lock;
exit when cur_lock%notfound;

if records_lock.v_request <> 'none' then
--抓取发出请求锁的会话

v_msg := v_msg || 'waiting sid: ' || records_lock.v_sid ||
' is request a lock ,lock_mode is ' ||
records_lock.v_request || ' and being locked ' ||
records_lock.v_lock_time || 's' || chr(10);
v_waiting_sid := records_lock.v_sid;
end if;

if records_lock.v_block <> 0 then
--抓取发生锁阻塞的会话
v_msg := v_msg || 'blocking sid: ' || records_lock.v_sid ||
' is make a lock , lock_mode is ' || records_lock.v_lmode ||
chr(10);

v_blocking_sid := records_lock.v_sid;
end if;

end loop;
close cur_lock;
v_sql := '';

v_msg := v_msg ||
lpad(rpad('查找产生锁的会话、锁等待的会话', 60, '-'), 81, '-') || chr(10);
v_sql := 'select distinct waiter.sid "waiting_sid",w_sql.sql_text "sql from waiting session",blocker.event "blocker event",blocker.sid "blocking sid",
b_sql.sql_text "sql from blocking session" from v$session waiter, v$session blocker,v$sql w_sql,v$sql b_sql
where waiter.event=''enq: TX - row lock contention'' and waiter.blocking_session=blocker.sid
and w_sql.sql_id=waiter.sql_id
and b_sql.sql_id =nvl(blocker.sql_id,blocker.prev_sql_id)';

open cur_lock02 for v_sql;
loop
fetch cur_lock02
into records_lock02;
exit when cur_lock02%notfound;

if records_lock02.waiting_sid is not null then
v_msg := v_msg || 'waiting sid: ' || records_lock02.waiting_sid ||
' wait_sql is : ' || records_lock02.waiting_sql || chr(10);

end if;

if records_lock02.blocking_sid is not null then
v_msg := v_msg || 'blocking sid: ' || records_lock02.blocking_sid ||
' block_sql is : ' || records_lock02.blocking_sql || chr(10);

end if;
end loop;
close cur_lock02;

v_msg := v_msg || lpad(rpad('解决锁阻塞、锁等待', 60, '-'), 81, '-') || chr(10);

select sid, serial#
into kill_sid, kill_serial
from v$session
where sid = v_blocking_sid;
v_msg := v_msg || 'action: alter system kill session ''' || kill_sid || ',' ||
kill_serial || ''';' || chr(10);

exception
when others  then
v_msg := v_msg || sqlerrm;

end solve_lock_061203_wanjie;