cxzl25 commented on PR #1244:
URL: https://github.com/apache/orc/pull/1244#issuecomment-1241821187

   >  I think the fundamental issue is that ORC is missing code to check and 
set isRepeating when reading all decimal vectors that are not null.
   
   Yes, I agree.
   I checked all `ColumnVectors`, only `DecimalColumnVector` isRepeating is not 
being reset.
   
   `StructBatchReader#readBatchColumn` always resets the vector, so on reads 
without type promotion, there is no problem.


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