Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/21240#discussion_r186276453
--- Diff:
sql/core/src/test/resources/sql-tests/inputs/udtf_replicate_rows.sql ---
@@ -0,0 +1,38 @@
+CREATE TEMPORARY VIEW tab1 AS SELECT * FROM VALUES
+ (1, 'row1', 1.1),
+ (2, 'row2', 2.2),
+ (0, 'row3', 3.3),
+ (-1,'row4', 4.4),
+ (null,'row5', 5.5),
+ (3, 'row6', null)
+ AS tab1(c1, c2, c3);
+
+-- Requires 2 arguments at minimum.
+SELECT replicate_rows(c1) FROM tab1;
--- End diff --
Add one case `SELECT replicate_rows()`?
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