top N
supported for topN
Merge branch 'branch_1.2.0' of https://github.com/Baidu-ecom/bi-platform.git into branch_1.2.0
top n support
top N 后端支持
Merge branch 'branch_1.2.0' of https://github.com/Baidu-ecom/bi-platform.git into branch_1.2.0