How does Oracle handles the delete ?

Question

Hi ,
I have a unix loder that does the issue this command
EXEC SQL DELETE FROM TBl1 where id in (select id from TMP)
if any user is accessing a record in TBL1 , will Oracle wait for the record to be released before it does the delete or it simply skip it ?
pls advise
tks & rgds

Answer 1

It will wait please look at the example below:
Session 1:
[email protected]> select * from dept;
DEPTNO DNAME LOC
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
[email protected]> update dept set loc = 'WARSAW' where deptno = 10;
1 row updated.
Session 2:
[email protected]> delete dept;
-- waiting
Session 1:
[email protected]> commit;
Commit complete.
Session 2:
4 rows deleted.
[email protected]> select * from dept;
DEPTNO DNAME LOC
10 ACCOUNTING WARSAW
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
Location was changed
Best Regards
Krystian Zieja / mob