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
private boolean isFirstRowPepared = true;
	
	private OutputStream metaOutputStream = null;
	private DataOutputStream rowOutputStream = null;
	
	
	private static Logger logger = Logger.getLogger( ResultIterator.class.getName( ) );
	private List columnList = null;
	private List preparedList = null;
	
	/**
	 * Constructor for report query (which produces a QueryResults)
	 * 
	 * @param context
	 * @param queryResults
	 * @param query
	 * @param odiResult
	 * @param scope
	 * @throws DataException
	 */
	ResultIterator( IServiceForResultSet rService,
			org.eclipse.birt.data.engine.odi.IResultIterator odiResult,
			Scriptable scope ) throws DataException
	{
		Object[] params = {
				rService, odiResult, scope
		};
		logger.entering( ResultIterator.class.getName( ),
				"ResultIterator",