====== JPA 2.1 ======
  * [[http://www.thoughts-on-java.org/jpa-21-overview/|JPA 2.1 Overview]]

===== Entity Graph =====
  * [[http://www.javacodegeeks.com/2014/11/jpa-entity-graphs.html|JPA Entity Graphs]] : Hibernate **Fetch Profiles** 같은 것.
  * [[http://www.radcortez.com/jpa-entity-graphs/|JPA Entity Graphs]]

===== Named Query =====
  * [[http://www.thoughts-on-java.org/define-named-queries-runtime-jpa-2-1/|How to define named queries at runtime with JPA 2.1]]

===== Bulk update/delete =====
  * [[http://www.thoughts-on-java.org/criteria-updatedelete-easy-way-to/|Criteria Update/Delete - The easy way to implement bulk operations in JPA 2.1]]

===== JPQL =====
  * [[https://www.javacodegeeks.com/2016/02/jpql-enhancements-jpa-2-1-java-ee-7-part-1-join.html|JPQL Enhancements in JPA 2.1 and Java EE 7 (part 1 – JOIN ON)]]

===== funcntion 으로 native function 호출 =====
  * [[https://thorben-janssen.com/database-functions/|How to call custom database functions with JPA and Hibernate]]
  * [[java:hibernate|Hibernate]] 를 구현체로 사용시에 항상 dialect 에 해당 function이 등록돼 있어야 한다.

==== dialect 등록 ====
<code java>
public class MyPostgreSQL9Dialect extends PostgreSQL94Dialect {

	public MyPostgreSQL9Dialect() {
		super();
		registerFunction("calculate", new StandardSQLFunction("calculate"));
	}
}
</code>
==== JPQL 에서 호출 ====
<code java>
Author a = em.createQuery("SELECT a FROM Author a WHERE a.id = function('calculate', 1, 2)", Author.class).getSingleResult();
</code>