Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/17065#discussion_r103073163 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/statsEstimation/FilterEstimation.scala --- @@ -297,6 +278,8 @@ case class FilterEstimation(plan: Filter, catalystConf: CatalystConf) extends Lo Some(DateTimeUtils.toJavaDate(litValue.toString.toInt)) case TimestampType => Some(DateTimeUtils.toJavaTimestamp(litValue.toString.toLong)) + case _: DecimalType => + Some(litValue.asInstanceOf[Decimal].toJavaBigDecimal) --- End diff -- @ron8hu the external value type of `DecimalType` is java decimal, and the internal value type is `Decimal`, we need to convert it.
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