How to make hibernate issue one "Insert" sql statement ? (and not some unnecessary Selects) ?

In a simple case where I have Person object that has many Emails, and I want to add an email address to some person I do the following (taken from Hibernate example):

session.beginTransaction();
Person aPerson = (Person) session.load(Person.class, personId);
aPerson.getEmailAddresses().add(emailAddress);
session.getTransaction().commit();

checking the logs, hibernate execute THREE sql stmt for that:

Hibernate: select person0_.PERSON_ID as PERSON1_2_0_, person0_.age as age2_0_, ...

Hibernate: select emailaddre0_.PERSON_ID as PERSON1_0_, emailaddre0_.EMAIL_ADDR as EMAIL2_0_ from PERSON_EMAIL_ADDR .....

Hibernate: insert into PERSON_EMAIL_ADDR (PERSON_ID, EMAIL_ADDR) values (?, ?)

why THREE ?
why not just the "INSERT" ?
how do I execute just one simple INSERT statement with Hibernate ? (without the TWO selects)

Hi haimke,

usually making this 2 selects don't represent a performance problem, as there should exist indexes on the
regarding attributes referred in the where-condition, so the selects should just take some millisecond to execute.
This 2 selects are necessary as this is the way the hibernate persistent context work:
-first you load the entities into persistent context making internal snapshots all loaded (non-readonly) entities
-then you do your changes
-on flush hibernate checks the difference between the entities and their regarding internal snapshots.
In this way hibernate recognizes which entities has to be updated on the database.

It the 2 selects create a performance problem to you, then you should check
-if they create a performance problem because they are executed extremely and unneccessarily often
-it they crate a performance problem because the database is slow or there are indexes missing on the database.

If you absolutely don't want this 2 select because you simply don't want them,
then you can use hibernates bulk-update feature for doing the inserts.
(You must be aware, that using bulk-updates(inserts) you are working outside hibernates persistent context)