Question

I know that the following code will delete the record with id = 5 from database:

 Query query = session.createQuery("delete from Class where id = 5");
 query.executeUpdate();

But before i delete it, need to save this record’s data in a variable.
So I want to select id = 5, and after some code, I delete it.
It’s not efficient if i use two distinct query for them. Because in this way we search database for this item two times.

query = session.createQuery("from Class where id = 5");
//somecode
query = session.createQuery("delete Class where id = 5");
...

So i need a more efficient way to do this, and do it better.

Answer 1

No need to create query to delete a record.

query = session.createQuery("from Class where id = 5");
List list=query.list();
if(list.size()!=0)
 {
   ClassName obj = (ClassName)list.get(0);
   session.delete(obj);
  }