NobiGo commented on code in PR #4242:
URL: https://github.com/apache/calcite/pull/4242#discussion_r1993022532
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core/src/main/java/org/apache/calcite/rel/rules/ReduceExpressionsRule.java:
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@@ -738,6 +740,20 @@ protected static boolean reduceExpressionsInternal(RelNode
rel,
// Replace predicates on CASE to CASE on predicates.
boolean changed = new CaseShuttle().mutate(expList);
+ // distinct for IN rexNode
+ for (RexNode rexNode : predicates.pulledUpPredicates) {
Review Comment:
I think changing this VALUE here complicates the issue. Maybe it would be
better to look into the "substituteSubQuery" option, before converting it to OR
or RexSubquery.
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