FA-2459 / Analytical processing / Member archive

Peer range sum: Accumulates values greater than the current value · case 04

The query violates its result contract: accumulates values greater than the current value.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Return each ID with sum of known v in its k partition at v no greater than the current peer value; peers share cumulative sum. Inputs are finite relations a=rows and b=refs with columns (id,k,v,w,flag,parent). IDs are unique within each relation, None is SQL NULL, keys are ASCII strings or None, and other values are integers or None. Return an unordered result bag as lists sorted by repr, preserving multiplicity unless explicitly distinct.

Why this case matters

Executes actual in-memory SQLite relational semantics. The fixtures exercise empty inputs, nullable groups, duplicate facts, known zero, negative values, peer ties and partition boundaries. This models the specified query contract, not optimizer performance, disk durability or a complete migration transaction.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
left facts without references	`[[104, 0], [114, 0], [124, 0], [134, null], [14, 8], [144, -1], [154, 2], [164, 2], [174, null], [184, 9], [194, 1], [204, -1], [24, 9], [34, 9], [44, 9], [54, 8], [64, 3], [74, 0], [84, 2], [94, 0]]`	`[[104, null], [114, 0], [124, null], [134, null], [14, null], [144, -2], [154, 2], [164, 2], [174, null], [184, 5], [194, -1], [204, -2], [24, -1], [34, 5], [44, 5], [54, -1], [64, 8], [74, -2], [84, 0], [94, null]]`	Failed

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