How to call stored procedure in Hibernate

http://www.mkyong.com/hibernate/how-to-call-store-procedure-in-hibernate/

In this tutorial, you will learn how to call a store procedure in Hibernate.

MySQL store procedure

Here’s a MySQL store procedure, which accept a stock code parameter and return the related stock data.

SQL

DELIMITER $$

CREATE PROCEDURE `GetStocks`(int_stockcode varchar(20))
BEGIN
SELECT * FROM stock where stock_code = int_stockcode;
END $$

DELIMITER ;

In MySQL, you can simple call it with a call keyword :

SQL

CALL GetStocks('7277');

Hibernate call store procedure

In Hibernate, there are three approaches to call a database store procedure.

1. Native SQL – createSQLQuery

You can use createSQLQuery() to call a store procedure directly.

Java

Query query = session.createSQLQuery(
"CALL GetStocks(:stockCode)")
.addEntity(Stock.class)
.setParameter("stockCode", "7277");

List result = query.list();
for(int i=0; i<result.size(); i++){
Stock stock = (Stock)result.get(i);
System.out.println(stock.getStockCode());
}

2. NamedNativeQuery in annotation

Declare your store procedure inside the @NamedNativeQueries annotation.

Java

//Stock.java
...
@NamedNativeQueries({
@NamedNativeQuery(
name = "callStockStoreProcedure",
query = "CALL GetStocks(:stockCode)",
resultClass = Stock.class
)
})
@Entity
@Table(name = "stock")
public class Stock implements java.io.Serializable {
...

Call it with getNamedQuery().

Java

Query query = session.getNamedQuery("callStockStoreProcedure")
.setParameter("stockCode", "7277");
List result = query.list();
for(int i=0; i<result.size(); i++){
Stock stock = (Stock)result.get(i);
System.out.println(stock.getStockCode());
}

3. sql-query in XML mapping file

Declare your store procedure inside the "sql-query" tag.

Markup

<!-- Stock.hbm.xml -->
...
<hibernate-mapping>
<class name="com.mkyong.common.Stock" table="stock" ...>
<id name="stockId" type="java.lang.Integer">
<column name="STOCK_ID" />
<generator class="identity" />
</id>
<property name="stockCode" type="string">
<column name="STOCK_CODE" length="10" not-null="true" unique="true" />
</property>
...
</class>

<sql-query name="callStockStoreProcedure">
<return alias="stock" class="com.mkyong.common.Stock"/>
<![CDATA[CALL GetStocks(:stockCode)]]>
</sql-query>

</hibernate-mapping>

Call it with getNamedQuery().

Java

Query query = session.getNamedQuery("callStockStoreProcedure")
.setParameter("stockCode", "7277");
List result = query.list();
for(int i=0; i<result.size(); i++){
Stock stock = (Stock)result.get(i);
System.out.println(stock.getStockCode());
}

Conclusion

The above three approaches are doing the same thing, call a store procedure in database. There are not much big different between the three approaches, which method you choose is depend on your personal prefer.