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Hash-join build indexes buckets by payload score · case 04

Hash-join build indexes buckets by payload score.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Probe a toy hash join whose hash bucket is integer key modulo bucket-count. Return left/right IDs for ordinary equal non-null keys AND right score>=left floor. Preserve all matching build rows and probe order. Hash equality alone never establishes row equality.

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
build multiplicity	`[[10, 20]]`	`[[10, 20], [10, 21]]`	Failed

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