/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.engine;
/**
* Enumeration of values describing <b>HOW</b> fetching should occur.
*
* @author Steve Ebersole
* @see FetchTiming
*/
public enum FetchStyle {
/**
* Performs a separate SQL select to load the indicated data. This can either be eager (the second select is
* issued immediately) or lazy (the second select is delayed until the data is needed).
*/
SELECT,
/**
* Inherently an eager style of fetching. The data to be fetched is obtained as part of an SQL join.
*/
JOIN,
/**
* Initializes a number of indicated data items (entities or collections) in a series of grouped sql selects
* using an in-style sql restriction to define the batch size. Again, can be either eager or lazy.
*/
BATCH,
/**
* Performs fetching of associated data (currently limited to only collections) based on the sql restriction
* used to load the owner. Again, can be either eager or lazy.
*/
SUBSELECT
}