Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r84830885
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
---
@@ -105,7 +113,15 @@ case class DateAdd(startDate: Expression, days:
Expression)
*/
@ExpressionDescription(
usage = "_FUNC_(start_date, num_days) - Returns the date that is
num_days before start_date.",
- extended = "> SELECT _FUNC_('2016-07-30', 1);\n '2016-07-29'")
+ extended = """
+ Arguments:
+ start_date - a date expression.
+ num_days - a numeric expression that represents the number of days
to subtract.
--- End diff --
The same one with
https://github.com/apache/spark/pull/15513/files/c55ecb60c79694c79a7c60c0c4a759bff6c71fc6#r84830856
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