[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2293) HQL Query with fetch causes exception if no rows selected be query (java.sql.SQLException: Exhausted Resultset )

[Andriy Solonchuk (JIRA)]

HQL Query with fetch causes exception if no rows selected be query (java.sql.SQLException: Exhausted Resultset )
----------------------------------------------------------------------------------------------------------------

         Key: HHH-2293
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2293
     Project: Hibernate3
        Type: Bug

  Components: core  
    Versions: 3.2.2    
 Environment: Oracle 10g2 (10.2.0.2.0) Hiberbate 3.2.0
    Reporter: Andriy Solonchuk


After executing next query 
select p from ProductHibernate p left join FETCH p.productSomeCollection
 where 1=2  /* that will cause NO rows returned*/

we will have exception 
org.hibernate.exception.GenericJDBCException: could not perform sequential read of results (forward)
	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
...
Caused by: java.sql.SQLException: Exhausted Resultset
	at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
...
	at org.hibernate.loader.Loader.getKeyFromResultSet(Loader.java:1088)
	at org.hibernate.loader.Loader.loadSequentialRowsForward(Loader.java:375)
	... 24 more

If we will review code of Loader.java class we can see next

			if ( resultSet.isAfterLast() ) {
				// don't even bother trying to read further
				return null;
			}

			if ( resultSet.isBeforeFirst() ) {
				resultSet.next();
			}

So at this step there are no checking if resultSet has any rows... 



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