Need help about below issue

Question

oracle version=10.2.0.4
OS= RHEl 5.5
Was testing for oracle locking mechanism and got something weired, need you response on the same.
The test case was as below,
conn scott/tiger
SQL> create table t1 (name varchar2(10), empcode number(10), salary number(10));
Table created.
SQL> insert into t1 values('SARAH',100,2000);
1 row created.
SQL> insert into t1 values ('marry',101,2300);
1 row created.
SQL> commit;
Commit complete.
SQL> select * from t1;
NAME   EMPCODE  SALARY
SARAH     100       2000
marry        101       2300
Then using connected to database using 2 different terminals and fired the below sql cmd
terminal 1
update t1 set EMPCODE=200 where EMPCODE=101;
which cause row lock on t1 and waiting for commit.
terminal 2
update t1 set NAME='MARRY' where salary=2300;
which hangs, as the row was locked by the first terminal.
Then what i did is exit the first terminal without using commit and then exit the second terminal also without commit.
after that i connected to database using third terminal and check the value  and i found is below,
SQL> select * from t1;
NAME          EMPCODE     SALARY
SARAH             100       2000
MARRY             200       2300
can anyone explain what happened.
Regards,
Saurabh

Answer 1

Hi,
"when you exit SQL*Plus, it would always commit - there was an implicit "commit work" issued for you right before it would disconnect your session"
Ref  :The Tom Kyte Blog: Another SQL*Plus thing I learned...
HTH