I have started learning HQL recently and tried to create a test application to see how it works.. but when i'm trying to run the project, i see duplicate columns are getting created with NULL value in it.
Here are my project details
I have a table (insurance) with this structure {id,insurance_name,invested_amount,investment_date} which i have create it.
and when i run the application it is creating two additional columns with null values {id,insurance_name,invested_amount,investment_date,INSURANCE_AMOUNT,INSURANCE_DATE } and i dont know from where they were getting created.
hibernate configuration file:
<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate4</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<mapping resource="insurance.hbm.xml"/>
</session-factory>
Mapping file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.roseindia.app.HQL.Insurance" table="INSURANCE">
<id name="id" type="long" column="ID">
<generator class="increment"></generator>
</id>
<property name="insuranceName">
<column name="INSURANCE_NAME"></column>
</property>
<property name="investmentAmount">
<column name="INSURANCE_AMOUNT"></column>
</property>
<property name="investmentDate">
<column name="INSURANCE_DATE"></column>
</property>
</class>
</hibernate-mapping>
POJO class:
public class Insurance {
private Long id;
private String insuranceName;
private Integer investmentAmount;
private Date investmentDate;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getInsuranceName() {
return insuranceName;
}
public void setInsuranceName(String insuranceName) {
this.insuranceName = insuranceName;
}
public Integer getInvestmentAmount() {
return investmentAmount;
}
public void setInvestmentAmount(Integer investmentAmount) {
this.investmentAmount = investmentAmount;
}
public Date getInvestmentDate() {
return investmentDate;
}
public void setInvestmentDate(Date investmentDate) {
this.investmentDate = investmentDate;
}
}
main class:
public class SelectClauseExample {
public static void main(String[] args) {
// TODO Auto-generated method stub
Session session =null;
try{
SessionFactory sessionFactory =new Configuration().configure().buildSessionFactory();
session= sessionFactory.openSession();
String SQL_QUERY="select insurance.id, insurance.insuranceName,insurance.investmentAmount,insurance.investmentDate from Insurance insurance";
Query query = session.createQuery(SQL_QUERY);
for (java.util.Iterator it = query.iterate(); it.hasNext();){
System.out.print("Inside for");
Object[] row = (Object[]) it.next();
System.out.println("ID: "+row[0]);
System.out.println("Name: "+row[1]);
System.out.println("Amount: "+row[2]);
System.out.println("Date: "+row[3]);
}
}catch(Exception e){
}finally{
session.flush();
session.close();
}
}
}
