[GitHub] [arrow-datafusion] tustvold commented on issue #5396: `Compute error: Overflow happened` in `tpcds_logical_q58`

["tustvold (via GitHub)" <gi...@apache.org>]

tustvold commented on issue #5396:
URL: https://github.com/apache/arrow-datafusion/issues/5396#issuecomment-1456565401

   > failed in expression "CAST(Int64(100) AS Decimal128(38, 38))"
   
   This sounds like a type inference bug, as opposed to something related to the handling of decimal arithmetic. In particular where has this scale of 38 come from? Such a datatype cannot represent anything greater 1 and so the query is perfectly correct to bail out with an error.
   
   The original schema has a precision of 2, as it represents a monetary quantity, and so ending up with a scale of 38 is extremely suspect...
   
   


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