beliefer commented on PR #44398:
URL: https://github.com/apache/spark/pull/44398#issuecomment-1862468433

   > Where does `Decimal precision 42` come from?
   
   It comes from 
https://github.com/apache/spark/blob/dc0bfc4c700c347f2f58625facec8c5771bde59a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala#L416
   The schema is `DecimalType(38, 38)` and the data returns from H2 is 
`java.math.BigDecimal(7, 2)`.
   d = java.math.BigDecimal(7, 2)
   p = 38
   s = 38
   The `Decimal(d, p, s)` causes the exception.


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