This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
This may be more of a MySql question, but thought I'd start here.
I am retrieving a result set from a MySQL table using Hibernate's native sql createSQLQuery(sql) method. I want to be able to make updates on the data, but won't be guaranteed that I have a unique identifier to use for an update statement. So, I was wondering if there is a way to say that I want to update X row number of a particular result set?
I have some other options, but thought I'd find out if there is already a way to do something similar. Hibernate's site is down, or else I'd ask there ;)
Well, any time you're updating a row, you need a primary key. So, that ResultSet should contain some primary key.
If the primary key maps to a key for a Hibernate managed POJO, you could just load that POJO with the primary key, update the POJO, and let Hibernate take care of the rest. That way you get the benefit of extraction through your SQL query, and persistence through the Hibernate framework!
Joined: Jul 15, 2005
Thanks Cameron. Since I'm using the Native SQL, I don't have any other object associated with the results. I think I'm going to have to manually add a PK to the data or enforce that the data already includes one.