[GitHub] [doris] zenoyang commented on issue #9079: [Enhancement] Cannot hit rollup even if the `if expr` contains the rollup dimension

[GitBox <gi...@apache.org>]

zenoyang commented on issue #9079:
URL: https://github.com/apache/doris/issues/9079#issuecomment-1169524968

   I found that after changing `if` to `case then`, can hit rollup
   
   ```sql
   select city_id,
          count(distinct case WHEN is_intention=1 then device_id end)
   from db1.tbl
   where dt='2022-04-11'
   group by city_id;
   
   -- explain sql: rollup: rollup1
   ```
   
   


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