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From AST to rows: the query engine·2 min

Set semantics & ORDER BY

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One last conceptual check before the capstone — about result ordering, the #1 determinism trap.

Knowledge check

Your engine returns the right 15 co-stars but the grader fails — the rows are in a different order than the fixture, and the query has no ORDER BY. What's the correct fix?

Multi-hop & isomorphism in the executorWire up the query command