viirya commented on a change in pull request #26881: [SPARK-30252][SQL]
Disallow negative scale of Decimal under ansi mode
URL: https://github.com/apache/spark/pull/26881#discussion_r365484980
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File path: sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
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@@ -134,10 +137,14 @@ final class Decimal extends Ordered[Decimal] with
Serializable {
// result. For example, the precision of 0.01 equals to 1 based on the
definition, but
// the scale is 2. The expected precision should be 3.
this._precision = decimal.scale + 1
+ this._scale = decimal.scale
+ } else if (decimal.scale < 0 &&
!SQLConf.get.allowNegativeScaleOfDecimalEnabled) {
+ this._precision = decimal.precision - decimal.scale
+ this._scale = 0
Review comment:
Do you mean allowing negative scale here?
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