Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/6814#discussion_r32885075
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala ---
@@ -286,6 +288,9 @@ object Decimal {
/** Maximum number of decimal digits a Long can represent */
val MAX_LONG_DIGITS = 18
+ /** Maximum precision a Decimal can support */
+ val MAX_PRECISION = 38
--- End diff --
ok. we can use `MathContext.UNLIMITED` for unlimited precision on scala
decimal.
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