xiedeyantu commented on code in PR #21715:
URL: https://github.com/apache/datafusion/pull/21715#discussion_r3189372323
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datafusion/expr/src/logical_plan/plan.rs:
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@@ -2431,7 +2434,14 @@ impl SubqueryAlias {
// Requalify fields with the new `alias`.
let fields = plan.schema().fields().clone();
let meta_data = plan.schema().metadata().clone();
- let func_dependencies =
plan.schema().functional_dependencies().clone();
+ // Recursive queries do not expose the anchor's functional
dependencies to
+ // the outer schema — the recursive term can produce rows that violate
+ // those dependencies, so they are intentionally dropped here.
+ let func_dependencies = if is_recursive_query {
+ FunctionalDependencies::empty()
+ } else {
+ plan.schema().functional_dependencies().clone()
+ };
Review Comment:
Sure, I have added a test.
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