Bug 135778 There is an error when the data item has no binding data set
Data item can have no binding data set, if it happens, it indicates it only use the basic Java Script function such as new Date(). At this moment, the data of data item is not stored in report document by DtE, which only supports these data items which has binding data set.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/PreparedDummyQuery.java
*/
		public IPreparedQuery getPreparedQuery( )
		{
			return this.preparedQuery;
		}
		/*
		 * @see org.eclipse.birt.data.engine.api.IQueryResults#getResultMetaData()
		 */
		public IResultMetaData getResultMetaData( ) throws BirtException
		{
			return null;
		}
		/*
		 * @see org.eclipse.birt.data.engine.api.IQueryResults#getResultIterator()
		 */
		public IResultIterator getResultIterator( ) throws BirtException
		{
			return new ResultIterator( this, exprManager, queryScope );
		}
		/*
		 * @see org.eclipse.birt.data.engine.api.IQueryResults#close()
		 */
		public void close( ) throws BirtException
		{
		}
	}
	/**
	 * 
	 */
	private static class ResultIterator implements IResultIterator