Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/20023#discussion_r160361785
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/DecimalType.scala ---
@@ -117,6 +117,7 @@ object DecimalType extends AbstractDataType {
val MAX_SCALE = 38
val SYSTEM_DEFAULT: DecimalType = DecimalType(MAX_PRECISION, 18)
val USER_DEFAULT: DecimalType = DecimalType(10, 0)
+ val MINIMUM_ADJUSTED_SCALE = 6
--- End diff --
@gatorsmile what about `spark.sql.decimalOperations.mode` which defaults to
`native` and accepts also `hive` (and in future also `sql2011` for throwing
exception instead of returning NULL)?
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