Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/6814#discussion_r32869361
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
---
@@ -162,4 +162,9 @@ class DecimalSuite extends SparkFunSuite with
PrivateMethodTester {
assert(new Decimal().set(100L, 10, 0).toUnscaledLong === 100L)
assert(Decimal(Long.MaxValue, 100, 0).toUnscaledLong === Long.MaxValue)
}
+
+ test("accurate precision after multiplication") {
+ val decimal = (Decimal(Long.MaxValue, 100, 0) * Decimal(Long.MaxValue,
100, 0)).toJavaBigDecimal
--- End diff --
We can use 38 in this test case
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