From bce9a03677f931d52491e7768aba9e4a19a7e696 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 19 Nov 2016 21:57:09 -0800
Subject: [PATCH] [SPARK-18508][SQL] Fix documentation error for DateDiff
## What changes were proposed in this pull request?
The previous documentation and example for DateDiff was wrong.
## How was this patch tested?
Doc only change.
Author: Reynold Xin <rxin@databricks.com>
Closes #15937 from rxin/datediff-doc.
---
.../sql/catalyst/expressions/datetimeExpressions.scala | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
index 9cec6be841..1db1d1995d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
@@ -1101,11 +1101,14 @@ case class TruncDate(date: Expression, format: Expression)
* Returns the number of days from startDate to endDate.
*/
@ExpressionDescription(
- usage = "_FUNC_(date1, date2) - Returns the number of days between `date1` and `date2`.",
+ usage = "_FUNC_(endDate, startDate) - Returns the number of days from `startDate` to `endDate`.",
extended = """
Examples:
- > SELECT _FUNC_('2009-07-30', '2009-07-31');
+ > SELECT _FUNC_('2009-07-31', '2009-07-30');
1
+
+ > SELECT _FUNC_('2009-07-30', '2009-07-31');
+ -1
""")
case class DateDiff(endDate: Expression, startDate: Expression)
extends BinaryExpression with ImplicitCastInputTypes {
--
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