Bug 195970 Two issues when evaluate a query inlcuding a subquery[07]
Description: Currently, when evaluating a query which includes a subquery, the query will be evaluated twice. The binding of query will pass to subquery twice. If user write a java script such as new Date() and i++. The result of query will be incorrect. Another issue: when write the report document, the binding of query will be written twice and the performance is not good to evalulate it twice.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedSubquery.java
return resultClass;
		}
		
		/*
		 * @see org.eclipse.birt.data.engine.odi.ICustomDataSet#open()
		 */
		public void open( ) throws DataException
		{
		}
		
		/*
		 * @see org.eclipse.birt.data.engine.odi.ICustomDataSet#fetc h()
		 */
		public IResultObject fetch( ) throws DataException
		{
			if ( finished )
				return null;
			finished = true;
			return resultIterator.getCurrentResult( );
		}
		
		/*
		 * @see org.eclipse.birt.data.engine.odi.ICustomDataSet#close()
		 */
		public void close( ) throws DataException
		{
		}
	}
	
}