csun5285 opened a new pull request, #42064:
URL: https://github.com/apache/doris/pull/42064

   ## Proposed changes
   
   ```
   select count(b) from test where b is null 
   ```
   
   - Even if the column "b" has produced a result through index calculation, t 
is still necessary to read the "b" column.
   
   <!--Describe your changes.-->
   
   


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