Jackie-Jiang commented on issue #10793:
URL: https://github.com/apache/pinot/issues/10793#issuecomment-1590195526

   > In the `ALL` columns mode, we generate min/max for all the columns. What 
would be the possible reason for missing the min/max value for the metric 
aggregation column? Thanks
   
   When a column doesn't have dictionary, `ColumnMinMaxValueGenerator` won't 
scan the values and fill the min/max value currently.


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