allisonwang-db commented on a change in pull request #32303:
URL: https://github.com/apache/spark/pull/32303#discussion_r619532923
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File path: sql/core/src/test/resources/sql-tests/inputs/join-lateral.sql
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@@ -0,0 +1,84 @@
+-- Test cases for lateral join
+
+CREATE VIEW t1(c1, c2) AS VALUES (0, 1), (1, 2);
+CREATE VIEW t2(c1, c2) AS VALUES (0, 2), (0, 3);
+
+-- lateral join with single column select
+SELECT * FROM t1, LATERAL (SELECT c1);
Review comment:
Postgres requires all subqueries in the FROM clause to have aliases, not
just lateral, but aliases are not required for subqueries in Spark.
```
select * from (select * from t1);
subquery in FROM must have an alias
```
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