RE: sql*plus autocommit and exit

A transaction is demarkated by savepoints or commit or rollback not by statements. Autocommit causes a commit to be issued after every statement. (ugh)
So commiting after N trasactions is pointless. Comiting after N statements is a danger to trnasaction boundries and data consistency. Jim

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Freeman, Donald Sent: Monday, August 15, 2005 12:27 PM
To: dba.orcl_at_gmail.com; oracle-l
Subject: RE: sql*plus autocommit and exit

That's not what autocommit does. You can set autocommit n to some value and it will commit after each 200 transactions. If you don't enter a value it will commit after each transaction. Doesn't have anything to do with commit before logout. It looks like what is happening is an implicit commit because you logged off.  

See item 3 below:
Oracle9i Database Concepts
Release 2 (9.2)

A transaction ends when any of the following occurs:

• You issue a COMMIT or ROLLBACK (without a SAVEPOINT clause) statement.
• You execute a DDL statement (such as CREATE, DROP, RENAME, ALTER). If the current transaction contains any DML statements, Oracle first commits the transaction, and then executes and commits the DDL statement as a new, single statement transaction.
• A user disconnects from Oracle. (The current transaction is committed.)
• A user process terminates abnormally. (The current transaction is rolled back.)

Don Freeman
Database Administrator 1
Bureau of Information Technology
Pennsylvania Department of Health
717-783-8095 Ext 337

	-----Original Message-----
	From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Sami Seerangan
	Sent: Monday, August 15, 2005 2:33 PM
	To: oracle-l
	Subject: sql*plus autocommit and exit
	
	
	Hi:
	
	I have a autocommit value set to OFF however when I exit from
SQL*Plus it commits the transaction.
	Is it a expected behavior?
	
	SQL> show auto
	autocommit OFF
	
	SQL> delete from t1;
	48601 rows deleted.
	
	SQL> exit
	Disconnected from Oracle Database 10g Enterprise Edition Release
10.1.0.2.0 - Production
	With the Partitioning, OLAP and Data Mining options
	C:\Documents and Settings\s397131\Desktop>sqlplus sami/sami
	SQL*Plus: Release 10.1.0.2.0 - Production on Mon Aug 15 14:29:05
2005
	Copyright (c) 1982, 2004, Oracle.  All rights reserved.
	
	Connected to:
	Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 -
Production
	With the Partitioning, OLAP and Data Mining options
	
	SQL> select count(*) from t1;
	
	  COUNT(*)
	----------
	         0
	
	SQL> show auto
	autocommit OFF
	SQL> 

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