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/ResultIterator.java
}
		}
		IOUtil.writeInt(rowOutputStream, getRowIndex( ));
		IOUtil.writeInt(rowOutputStream, getStartingGroupLevel( ));
		IOUtil.writeInt(rowOutputStream, getEndingGroupLevel( ));
		for (int i = 0; i < columnList.size(); i++)
		{
			IOUtil.writeObject(rowOutputStream, getValue((String) columnList
					.get(i)));
		}
	}
	
	/**
	 * @return
	 * @throws DataException 
	 */
	protected boolean hasNextRow( ) throws DataException
	{
		return this.odiResult.next( );
	}
	/*
	 * (non-Javadoc)
	 * @see org.eclipse.birt.data.engine.api.IResultIterator#isEmpty()
	 */
	public boolean isEmpty() throws DataException
	{
		return this.odiResult.getRowCount( ) == 0 ? true : false;
	}
	
	/*