Repository: spark
Updated Branches:
  refs/heads/branch-2.1 5c18b6c31 -> 9dfdd2adf


clarify array_contains function description

## What changes were proposed in this pull request?

The description in the comment for array_contains is vague/incomplete (i.e., 
doesn't mention that it returns `null` if the array is `null`); this PR fixes 
that.

## How was this patch tested?

No testing, since it merely changes a comment.

Please review http://spark.apache.org/contributing.html before opening a pull 
request.

Author: Will Manning <lwwmann...@gmail.com>

Closes #17380 from lwwmanning/patch-1.

(cherry picked from commit a04dcde8cb191e591a5f5d7a67a5371e31e7343c)
Signed-off-by: Reynold Xin <r...@databricks.com>


Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/9dfdd2ad
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/9dfdd2ad
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/9dfdd2ad

Branch: refs/heads/branch-2.1
Commit: 9dfdd2adff508d256ae392ebe1b29f721931cf5e
Parents: 5c18b6c
Author: Will Manning <lwwmann...@gmail.com>
Authored: Wed Mar 22 00:40:48 2017 +0100
Committer: Reynold Xin <r...@databricks.com>
Committed: Wed Mar 22 00:41:09 2017 +0100

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 sql/core/src/main/scala/org/apache/spark/sql/functions.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/spark/blob/9dfdd2ad/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala 
b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 9a080fd..fab9202 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -2854,7 +2854,7 @@ object functions {
   
//////////////////////////////////////////////////////////////////////////////////////////////
 
   /**
-   * Returns true if the array contains `value`
+   * Returns null if the array is null, true if the array contains `value`, 
and false otherwise.
    * @group collection_funcs
    * @since 1.5.0
    */


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