wangyum commented on a change in pull request #29731:
URL: https://github.com/apache/spark/pull/29731#discussion_r487630070
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File path: sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
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@@ -143,8 +143,12 @@ final class Decimal extends Ordered[Decimal] with
Serializable {
} else if (decimal.scale < 0 &&
!SQLConf.get.allowNegativeScaleOfDecimalEnabled) {
this._precision = decimal.precision - decimal.scale
this._scale = 0
- // set scale to 0 to correct unscaled value
- this.decimalVal = decimal.setScale(0)
+ if (this._precision > 309) {
+ this.decimalVal = null
Review comment:
Yes. I have moved this logical to `Cast`.
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