Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/20618#discussion_r169299563 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala --- @@ -252,7 +255,14 @@ case class Ceil(child: Expression) extends UnaryMathExpression(math.ceil, "CEIL" } @ExpressionDescription( - usage = "_FUNC_(expr) - Returns the cosine of `expr`.", + usage = """ + _FUNC_(expr) - Returns the cosine of `expr`, as if computed by + `java.lang.Math._FUNC_`. + """, + arguments = """ + Arguments: + * expr - angle in radians + """, --- End diff -- Let's remote two spaces -> ``` * expr - angle in radians """, ```
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