Updating in hibernate world dating series wiki
public class Save Or Update Method Example Output: Hibernate: insert into Employee (FIRST_NAME, LAST_NAME, ID) values (?
Let’s see how it can be used along with entity persisted with save() method.
Let’s write down a simple example to see above theory in practical: Employee public class Save Entity Again In Another Session Hibernate: insert into Employee (FIRST_NAME, LAST_NAME, ID) values (? If you understand the hibernate mechanism clearly, it doesn’t execute the SQL statements directly to manipulate the database, hibernate itself a state maintaining mechanism. Hibernate just holds the state of the new object, loaded object and updated object. However, if the database table is heavily indexed, we don’t want to update certain index entries that have not been modified, as explained by Markus Winand.For this reason, Hibernate offers the Flexibility is very important when dealing with a data access framework, and, for this reason, Hibernate offers several options to avoid updating certain columns, or to update just the columns that got modified.
I was asked to look into some issue with a Stale Object State exception the other day.