HBASE AggregationClient sum和rowcount的问题

[a12939026]

scan.setFilter(list);
		AggregationClient aggregationClient = hbaseUtils.getAggregationClient();
		long rowCount = aggregationClient.rowCount(TableName.valueOf(Constant.TABLE_NAME), new LongColumnInterpreter(), scan);   
	    System.out.println("row count is " + rowCount); 

		Double sum = aggregationClient.max(TableName.valueOf(Constant.TABLE_NAME), new DoubleColumnInterpreter(), scan); 
	    System.out.println("sum is " + sum);  
	

为啥同样的方法，rowcount是经过filter过滤后的结果，但是sum却是全集的统计啊。。