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Dataset deduplication: equivalence group IDs depend on input order · case 04

equivalence group IDs depend on input order.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Rows [id,group_key]; return [id,canonical_group_id] in input order where canonical ID is the smallest ID for each key.

Why this case matters

This deterministic toy operation makes one dataset equivalence or representative rule explicit.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixtureActualExpectedOutcome
noncanonical first[["z", "z"], ["a", "z"]][["z", "a"], ["a", "a"]]Failed

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