iwanttobepowerful commented on code in PR #5385:
URL: https://github.com/apache/calcite/pull/5385#discussion_r4454440716
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core/src/test/resources/sql/sub-query.iq:
##########
@@ -11242,3 +11246,78 @@ order by e.ename;
(14 rows)
!ok
+
+!if (use_old_decorr) {
+# Test case for [CALCITE-7914] Rebuilding correlation values must not resample
the outer input.
+select (select count(*) from (values 1) s(x) where t.k < s.x) as p
+from (select deptno as k from dept tablesample bernoulli(50)) t;
+EnumerableCalc(expr#0..1=[{inputs}], expr#2=[IS NULL($t1)], expr#3=[0:BIGINT],
expr#4=[CASE($t2, $t3, $t1)], P=[$t4])
+ EnumerableCorrelate(correlation=[$cor0], joinType=[left],
requiredColumns=[{0}])
+ EnumerableCalc(expr#0..2=[{inputs}], expr#3=[CAST($t0):INTEGER NOT NULL],
expr#4=[RAND()], expr#5=[0.5:DECIMAL(2, 1)], expr#6=[<($t4, $t5)],
DEPTNO0=[$t3], $condition=[$t6])
+ EnumerableTableScan(table=[[scott, DEPT]])
+ EnumerableAggregate(group=[{}], EXPR$0=[COUNT()])
+ EnumerableCalc(expr#0=[{inputs}], expr#1=[$cor0], expr#2=[$t1.DEPTNO0],
expr#3=[1], expr#4=[<($t2, $t3)], X=[$t0], $condition=[$t4])
+ EnumerableValues(tuples=[[{ 1 }]])
+!plan
+
+# Test case for [CALCITE-7914] Outer rows with equal bindings must still
sample the inner input separately.
+select (select count(*) from dept tablesample bernoulli(50) where deptno >
t.k) as p
+from (values 1, 1, 2) t(k);
+EnumerableCalc(expr#0..1=[{inputs}], expr#2=[IS NULL($t1)], expr#3=[0:BIGINT],
expr#4=[CASE($t2, $t3, $t1)], P=[$t4])
+ EnumerableCorrelate(correlation=[$cor0], joinType=[left],
requiredColumns=[{0}])
Review Comment:
?
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