seawinde opened a new pull request, #35026:
URL: https://github.com/apache/doris/pull/35026

   ## Proposed changes
   agg_state is agg  intermediate state, detail see  [state 
combinator](https://doris.apache.org/zh-CN/docs/dev/sql-manual/sql-functions/combinators/state)
   
   this support agg function roll up as following
    
    <meta charset="utf-8"><div data-page-id="KOvCdvhfko9DqlxchM3cS95xnGh" 
data-docx-has-block-data="true"><div>
   查询中 | 物化中 | 上卷后
   -- | -- | --
   agg_funtion() | agg_funtion_unoin()  or agg_funtion_state() | 
agg_funtion_merge()
   agg_funtion_unoin() | agg_funtion_unoin() or agg_funtion_state() | 
agg_funtion_union()
   agg_funtion_merge() | agg_funtion_unoin() or agg_funtion_state() | 
agg_funtion_merge()
   
   for example which can be rewritten by mv sucessfully as following
   **mv def is**
   
   ```
               select
               o_orderstatus,
               l_partkey,
               l_suppkey,
               sum_union(sum_state(o_shippriority)),
               group_concat_union(group_concat_state(l_shipinstruct)),
               avg_union(avg_state(l_linenumber)),
               max_by_union(max_by_state(l_shipmode, l_suppkey)),
               count_union(count_state(l_orderkey)),
               
multi_distinct_count_union(multi_distinct_count_state(l_shipmode))
               from lineitem
               left join orders
               on lineitem.l_orderkey = o_orderkey and l_shipdate = o_orderdate
               group by
               o_orderstatus,
               l_partkey,
               l_suppkey;
   ```
   
   
   **query is**
   
   ```
               select
               o_orderstatus,
               l_suppkey,
               sum(o_shippriority),
               group_concat(l_shipinstruct),
               avg(l_linenumber),
               max_by(l_shipmode,l_suppkey),
               count(l_orderkey),
               multi_distinct_count(l_shipmode)
               from lineitem
               left join orders 
               on l_orderkey = o_orderkey and l_shipdate = o_orderdate
               group by
               o_orderstatus,
               l_suppkey;
   ```
   
   
   
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[[email protected]](mailto:[email protected]) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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