cloud-fan commented on code in PR #50717:
URL: https://github.com/apache/spark/pull/50717#discussion_r2079208452
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sql/core/src/test/resources/sql-tests/inputs/cte-recursion.sql:
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@@ -544,4 +544,11 @@ WITH RECURSIVE t1 AS (
SELECT 1 AS n
UNION ALL
SELECT n+1 FROM t2 WHERE n < 5)
-SELECT * FROM t1;
\ No newline at end of file
+SELECT * FROM t1;
+
+-- Recursive CTE with useless columns and filtering
+WITH RECURSIVE t1(a,b,c) AS (
Review Comment:
we should check the optimized plan
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