Hibernate executeupdate not updating dating sites for older singles
The insert happens immediately if the ID generation depends on inserting the object into the database.
So what you are describing is expected and is also explained in the Hibernate documentation: ...
Consider 2 classes: public class A public class B The following code persists an instance of A and B within same transaction B b = new B(); get Hibernate Template().save(b); // Persist as object A a = new A(); B(b); Working ----------- get Hibernate Template.save(a); // Persist as object Not working: --------------- SQLQuery query = get Session().create SQLQuery("insert into table_a (column_b) values(?
)"); Integer(Id()); query.execute Update(); // Persist using native SQL query It fails with foreign key violation constraint claiming that no record with id = xxx exists in table_b, even though i issued an insert of object 'b'.
Hi, I was wondering if Query.execute Update() always return the number of deleted entities, or of this may depend on the database I'm using?
I resorted to making HQL calls for each field: session.create Query("update Role set name = '" Name() "' where id = " ID()).execute Update(); session.create Query("update Role set description = '" Description() "' where id = " ID()).execute Update(); HOWEVER, when it came to the map in the Role object I tried to make sql calls to save the relationships and of course I reliazed execute Update for create SQLQuery was not supported. So Im not sure how to save back the mapping to the database at this point since hibernate refused to do it on its own.Below is the old way, which is performing twice as fast: Alright I'm now calling the "query.execute Update()" 850 times within the same transaction and it really reduced the processing time.So basically "query.execute Update()" gets called 850 times but session.commit() gets called only once.This is my source code: //Prep work Session Factory session Factory = Hibernate Session Factory(); Session session = session Current Session(); //Get All Employees Transaction tx = session.begin Transaction(); Query query = session.create Query("from Employee"); List emp List = query.list(); for(Employee emp : emp List) //Update Employee query = session.create Query("update Employee set name= :name where id= :id"); Parameter("name", "Pankaj Kumar"); Long("id", 1); int result = query.execute Update(); println("Employee Update Status=" result); query = session.create Query("from Employee"); emp List = query.list(); for(Employee emp : emp List) //rolling back to save the test data tx.rollback(); //closing hibernate resources session Factory.close(); List of Employees::1, San Jose List of Employees::2, Santa Clara List of Employees::3, Bangalore List of Employees::4, New Delhi Hibernate: update EMPLOYEE set emp_name=? Employee Update Status=1 Hibernate: select employee0_.emp_id as emp_id1_1_, employee0_.emp_name as emp_name2_1_, employee0_.emp_salary as emp_sala3_1_ from EMPLOYEE employee0_ List of Employees::1, San Jose List of Employees::2, Santa Clara List of Employees::3, Bangalore List of Employees::4, New Delhi Changes are actually saved to DB after the transaction is committed, that is the whole point of transaction.If you are facing a scenario where you need to update data on database then get it for further processing either you update it locally on your objects which will be residing in the persistence context ( in that case will make much more sence to do create Or Update instead of your query), or separate the two steps in 2 transactions You are performing the same query again, but you never committed the first transacation, hence the changes you made were never persisted.