Historical assessment of the original compound-join implementation#

This assessment applied to discarded merge 9838e88f78a8571f214874a587c6373318030b2f, combining original PR head 82d50c00e580aeeabd54756b9efe61ca750e53cd with main 4070864414f26212dcef20e2537057bff8e21535 on 2026-10-05.

That implementation failed special-value tuple equality and omitted additional join conditions from query identity. Its implementation and example tests were removed before the replacement. Its readiness verdict does not apply to the current branch.

The archived assessment preserves the old diagnostics and revision-specific receipts. The replacement evidence describes the current design, oracle owners, replay commands, and coverage limits.