beliefer commented on a change in pull request #29604:
URL: https://github.com/apache/spark/pull/29604#discussion_r489187406
##########
File path: sql/core/src/test/resources/sql-tests/inputs/window.sql
##########
@@ -124,4 +144,26 @@ WINDOW w AS (PARTITION BY cate ORDER BY val);
-- with filter predicate
SELECT val, cate,
count(val) FILTER (WHERE val > 1) OVER(PARTITION BY cate)
-FROM testData ORDER BY cate, val;
\ No newline at end of file
+FROM testData ORDER BY cate, val;
+
+-- nth_value() over ()
+SELECT
+ employee_name,
+ salary,
+ nth_value(employee_name, 2) OVER (ORDER BY salary DESC)
second_highest_salary
+FROM
+ basic_pays
+ORDER BY salary DESC;
+
+SELECT
+ employee_name,
+ department,
+ salary,
+ NTH_VALUE(employee_name, 2) OVER (
+ PARTITION BY department
+ ORDER BY salary DESC
+ RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING
Review comment:
OK
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