merge() optimization for Oracle dialect --------------------------------------- Key: HHH-3011 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3011 Project: Hibernate3 Issue Type: Improvement Components: core Reporter: MG Priority: Minor merge() optimization for Oracle dialect. Since 9i Oracle has a MERGE statement which is very useful to save round trips to database in merge() call which will make dramatic improvement for performance of loading large row sets. MERGE command processes the conditional INSERT-or-UPDATE within a single statement. So instead of doing 'select' first to detect whether entity is in database or not (This is one round trip to DB) and then issuing 'update' or 'insert' all of it could be done in one statement with no extra round trips using oracle SQL MERGE statement. http://www.oracle.com/technology/products/oracle9i/daily/Aug24.html -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira