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/PreparedQuery.java
{
	private 	IBaseQueryDefinition 	baseQueryDefn;
	
	private     DataEngineContext 		dataEngineContext;
	private 	DataEngineSession 		session;
	private     ExpressionCompiler 		expressionCompiler;
	private 	IPreparedQueryService 	queryService;
	
	private  	AggregateTable			aggrTable;
	private 	Map 					appContext;
	
	
	private 	HashMap 				subQueryMap;
	
	private 	HashMap 				subQueryDefnMap;
	
	private 	static Logger logger = Logger.getLogger( DataEngineImpl.class.getName( ) );
	
	private 	ExprManager 			exprManager;
	
	/**