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Batch fetch reads the beginning of a partially consumed batch · case 02

Batch fetch reads the beginning of a partially consumed batch.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Fetch at most quota rows from a sequence of batches starting at [batch-index,row-offset]. Skip exhausted and empty batches, return the emitted rows and a canonical next cursor, and mark exhaustion as [number-of-batches,0]. Quota zero preserves a normalized cursor.

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
partial current batch	`[[2], [0, 2]]`	`[[3], [0, 2]]`	Failed

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