Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r85214549
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala
---
@@ -77,9 +89,21 @@ case class Rand(seed: Long) extends RDG {
}
}
-/** Generate a random column with i.i.d. gaussian random distribution. */
+/** Generate a random column with i.i.d. values drawn from the standard
normal distribution. */
+// scalastyle:off line.size.limit
@ExpressionDescription(
- usage = "_FUNC_(a) - Returns a random column with i.i.d. gaussian random
distribution.")
+ usage = "_FUNC_([seed]) - Returns a random column with i.i.d. values
drawn from the standard normal distribution.",
--- End diff --
`i.i.d. values` -> `independent and identically distributed (i.i.d.)
values`
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