Major Description
Please refer to BigDecimal doc:
... the rounding mode setting of a MathContext object with a precision setting of 0 is not used and thus irrelevant. In the case of divide, the exact quotient could have an infinitely long decimal expansion; for example, 1 divided by 3.
Because we provide a MathContext.UNLIMITED in toBigDecimal, Decimal divide operation will throw the following exception:
val decimal = Decimal(1.0, 10, 3) / Decimal(3.0, 10, 3) [info] java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result. [info] at java.math.BigDecimal.divide(BigDecimal.java:1690) [info] at java.math.BigDecimal.divide(BigDecimal.java:1723) [info] at scala.math.BigDecimal.$div(BigDecimal.scala:256) [info] at org.apache.spark.sql.types.Decimal.$div(Decimal.scala:272)
