xiedeyantu commented on code in PR #4637:
URL: https://github.com/apache/calcite/pull/4637#discussion_r2536099196
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core/src/main/java/org/apache/calcite/sql2rel/RelDecorrelator.java:
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@@ -1184,6 +1185,160 @@ private static void shiftMapping(Map<Integer, Integer>
mapping, int startIndex,
return null;
}
+ /**
+ * Given the SQL:
+ * SELECT ename,
+ * (SELECT sum(c)
+ * FROM
+ * (SELECT deptno AS c
+ * FROM dept
+ * WHERE dept.deptno = emp.deptno
+ * UNION ALL
+ * SELECT 2 AS c
+ * FROM bonus
+ * WHERE bonus.job = emp.job) AS union_subquery
+ * ) AS correlated_sum
+ * FROM emp;
+ *
+ * <p>from:
Review Comment:
Could you please move this case to RelOptRuleTest?
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