按层级 sum 功能结果集，不支持使用“别名”

对字段 sum 查询后，希望使用“别名” 展示结果集列；例如：

select sum(errorQps) as errorQps ,sum(QPS) as QPS from root.yuerj."30001"."client-521".*.*.* GROUP BY ([1970-01-01T08:00:00.100+08:00, 1970-01-01T08:00:00.900+08:00), 100ms) ,level=3

Start by reproducing the shown SELECT SUM ... AS ... GROUP BY query against Apache IoTDB, focusing on the level=3 hierarchical result set. Compare the returned column names with the aliases in the query; done means the aggregated columns are displayed using errorQps and QPS without breaking the query.

Written by the indexing model from the issue text.