Mryange opened a new pull request, #39073:
URL: https://github.com/apache/doris/pull/39073

   …38731)
   https://github.com/apache/doris/pull/38731
   The stddev function has a separate implementation for the DecimalV2 type, 
but there are issues with the implementation. Given that there is almost no 
existing data for DecimalV2, it will be removed here. For be, upgrading to this 
situation will result in an error directly.
   ```
   SELECT STDDEV(data) FROM DECIMALV2_10_0_DATA;
   ERROR 1105 (HY000): errCode = 2, detailMessage = 
(127.0.0.1)[INTERNAL_ERROR]Agg Function stddev(decimal(10,0)) is not implemented
   ```
   After removing DecimalV2, parameters of type DecimalV2 will be converted to 
double for calculations.
   
   ## Proposed changes
   
   Issue Number: close #xxx
   
   <!--Describe your changes.-->
   
   


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