u70b3 commented on issue #16134:
URL: https://github.com/apache/datafusion/issues/16134#issuecomment-5019659970
Verified on current main (1e589287c): this no longer reproduces. The repro
query now fails with a proper execution error instead of silently producing a
cross product:
```
SELECT s.*, (SELECT * FROM (VALUES (1), (2)) t(x)) sub FROM (VALUES ('a'),
('b')) s(a);
-- Execution error: Scalar subquery returned more than one row
```
The check is enforced by `ScalarSubqueryExec` since #22530. Suggest closing.
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