NobiGo commented on code in PR #4714:
URL: https://github.com/apache/calcite/pull/4714#discussion_r2659498420
##########
core/src/test/resources/sql/scalar.iq:
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@@ -310,4 +310,97 @@ select
!ok
+# [CALCITE-7348] Remove redundant extraction correlation variables when Trim
Project Fields
+
+!set trimfields true
+
+SELECT empno, (SELECT COUNT(*) AS c
+FROM "scott".emp
+WHERE mgr < "t".mgr) AS "$f1"
+FROM "scott".emp as "t"
+WHERE sal > 10;
++-------+-----+
+| EMPNO | $f1 |
++-------+-----+
+| 7369 | 12 |
+| 7499 | 2 |
+| 7521 | 2 |
+| 7566 | 9 |
+| 7654 | 2 |
+| 7698 | 9 |
+| 7782 | 9 |
+| 7788 | 0 |
+| 7839 | 0 |
+| 7844 | 2 |
+| 7876 | 8 |
+| 7900 | 2 |
+| 7902 | 0 |
+| 7934 | 7 |
++-------+-----+
+(14 rows)
+
+!ok
+EnumerableCalc(expr#0..3=[{inputs}], expr#4=[IS NULL($t3)], expr#5=[0:BIGINT],
expr#6=[CASE($t4, $t5, $t3)], EMPNO=[$t0], $f1=[$t6])
Review Comment:
The main purpose of this plan here is to ensure that my verification process
is correct.
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