kangkaisen commented on issue #2101: 明细表支持预聚合 URL: https://github.com/apache/incubator-doris/issues/2101#issuecomment-548199500 > > > alter table sales add rollup agg_sales as > > > SELECT country, sex, sum(quantity), sum(price) > > > FROM sales > > > GROUP BY country, sex > > > > > > `ALTER TABLE sales ADD ROLLUP(country, sex, sum(quantity), sum(price));` > > 直接这样是不是简洁点？ > > I think a SQL query is better for following reasons > > 1. it is consistent with query > 2. it is easy to extend, such as adding bitmap_union Maybe We can refer to this paper: https://courses.cs.washington.edu/courses/cse591d/01sp/opt_views.pdf Calcite Implement this algorithm and I also Implemented this algorithm in Presto. But this algorithm is a litter complex and need a CBO query optimizer, which could be a long-term solution.
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