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
}
		return subquery.execute( iterator, subScope );
	}
	
	/**
	 * Closes the prepared query. This instance can no longer be executed after
	 * it is closed 
	 * 
	 * TODO: expose this method in the IPreparedQuery interface
	 */
	void close( )
	{
		this.baseQueryDefn = null;
		this.aggrTable = null;
		this.subQueryMap = null;
		
		logger.logp( Level.FINER,
				PreparedQuery.class.getName( ),
				"close",
				"Prepared query closed" );
		
		
	}
	
	
	/**
	 * @return sharedScope
	 */
	Scriptable getSharedScope( )
	{