In Oracle, we can do this:

SELECT * from
(
SELECT *, ROWNUM as rownumber from Product order by name
)
where rownumber between (PageNbr - 1)*PageSize + 1 and PageNbr*PageSize

As you can see, this query needs to fetch all rows first then narrows down the result. A more efficient query is:

select *
from ( select a.*, rownum rnum
from ( select * from product order by name) a
where rownum <= PageNbr*PageSize)
where rnum >= (PageNbr - 1)*PageSize + 1

Oracle will optimize this query, so it is not as resource intensive as the first one.

In SQL Server 2005, we can do similar query:

WITH Temp AS
(
SELECT row_number() OVER (ORDER BY [name]) AS rowNum, * from Product
)
SELECT * FROM Temp
WHERE rowNum between (@PageNbr - 1) * @PageSize + 1 and @PageNbr * @PageSize
ORDER BY [name]

The query had been optimized in SQL Server as well.

Here is my stored procedure which return book name and ISBN number for a given branch and for a given author

CREATE OR REPLACE PROCEDURE SP_LIB_DTL(p_cursor    out sys_refcursor,
                                       in_brnch_cd in number,
                                       in_auth_cd in number)
as
  bookName varchar2(8);
  ISBN     number;
begin
  bookName := null;
  ISBN     := 0;
  open p_cursor for
    select l.book_name, l.isbn_nbr
      into bookName, ISBN
      from LIB_BRNCH_DTL l
     where l.branch_code = in_brnch_cd
     and l.auth_code = in_auth_cd;

end;

HIbernate Mapping for return class and Named Query:

<?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.org.lib.LibraryDetails”>
<id name=”ISBN” type=”long” />
<property name=”bookName” type=”string” />
</class>
 <sql-query name=”LIB_SP” callable=”true”>
 <return class=”com.org.lib.LibraryDetails”>
   <return-property name=”ISBN” column=”isbn_nbr” />
   <return-property name=”bookName” column=”book_name” />
 </return>
  {  call SP_LIB_DTL(? , :branchCD ,:authorCD) }
 </sql-query>
</hibernate-mapping>

Make sure you have used the correct database field name value for the column attribute for the return property mapping. You will get the following error if you don’t map the correct databse field name

could not execute query; bad SQL grammar [{  call SP_LIB_DTL(? , ?) }];
nested exception is java.sql.SQLException: Invalid column name

Here is the DAO implementation for executing query and to set the bind parameter values.

public  List selectBooks(final BigDecimal branchCode,final BigDecimal authorCode){
        return (List) getHibernateTemplate().execute(new HibernateCallback() {
              public Object doInHibernate(Session session) throws HibernateException, SQLException
              {
                  Query q = session.getNamedQuery(“LIB_SP”);
                  q.setLong(“branchCD”, branchCode.longValue());
                  q.setLong(“authorCD”, authorCode.longValue());
                  return q.list();
              }
          });
      }