[jira] [Reopened] (SPARK-8677) Decimal divide operation throws ArithmeticException

["Yin Huai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-8677?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Huai reopened SPARK-8677:
-----------------------------

> Decimal divide operation throws ArithmeticException
> ---------------------------------------------------
>
>                 Key: SPARK-8677
>                 URL: https://issues.apache.org/jira/browse/SPARK-8677
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Liang-Chi Hsieh
>            Assignee: Liang-Chi Hsieh
>             Fix For: 1.5.0
>
>
> Please refer to [BigDecimal doc|http://docs.oracle.com/javase/1.5.0/docs/api/java/math/BigDecimal.html]:
> {quote}
> ... 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.
> {quote}
> Because we provide a MathContext.UNLIMITED in toBigDecimal, Decimal divide operation will throw the following exception:
> {code}
> 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)
> {code}



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