diff --git a/docs/source/user-guide/sql/scalar_functions.md b/docs/source/user-guide/sql/scalar_functions.md
index e7ebbc9f1fe7..74dceb221ad2 100644
--- a/docs/source/user-guide/sql/scalar_functions.md
+++ b/docs/source/user-guide/sql/scalar_functions.md
@@ -2315,7 +2315,7 @@ array_union(array1, array2)
 +----------------------------------------------------+
 | array_union([1, 2, 3, 4], [5, 6, 7, 8]);           |
 +----------------------------------------------------+
-| [1, 2, 3, 4, 5, 6]                                 |
+| [1, 2, 3, 4, 5, 6, 7, 8]                           |
 +----------------------------------------------------+
 ```