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 Hibernate > Hibernate Query Language > Concat Expression

Concat Expression 

The following example shows concatenation operation using HQL. Refer first example for the configuration and mapping.

File Name  :  
com/bethecoder/tutorials/hibernate/basic/tests/HQLConcatOperationTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.hibernate.basic.tests;

import java.util.Iterator;
import java.util.List;
import org.hibernate.Session;
import com.bethecoder.tutorials.hibernate.basic.util.HibernateUtil;

public class HQLConcatOperationTest {

  /**
   @param args
   */
  public static void main(String[] args) {

    getCompanies("select id||'->'||lower(name) from Company");
    
    getCompanies("select id||'['||lower(name)||', '||upper(address1)||']' from Company");
  }

  private static void getCompanies(String hql) {
    Session session = HibernateUtil.getSessionFactory().openSession();
    session.beginTransaction();
    List<?> rows = session.createQuery(hql).list();    
    
    System.out.println("Selected row count : " + rows.size());
    Iterator<?> rowsIt = rows.iterator();
    
    while (rowsIt.hasNext()) {
      System.out.println(rowsIt.next());
    }
    
    session.getTransaction().commit();
    session.close();
  }
}
   

It gives the following output,
Selected row count : 10
1->pqr
2->abc
3->mno
4->ijk
5->art
6->rnk
7->aoq
8->bqo
9->cfr
10->cfr


Selected row count : 10
1[pqr, ADD1@]
2[abc, ADD11]
3[mno, ADD111]
4[ijk, ADD1112]
5[art, ADD1112]
6[rnk, ADD1412]
7[aoq, ADD17892]
8[bqo, ADD1459]
9[cfr, ]
10[cfr, ]


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