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UNION pagination resets its offset for each branch · case 03

UNION pagination resets its offset for each branch.

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Case contract

Concatenate ordered input branches with bag semantics, then apply one global nonnegative offset and limit. Branch-local boundaries, empty branches, and repeated rows do not reset pagination counters. Output order is branch order then row order.

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
offset crosses branches	`[]`	`[5, 6]`	Failed

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