FA-45254 / Data systems / Member archive

Partition injection invents one row for an empty file fragment · case 04

Partition injection invents one row for an empty file fragment.

Member previewVariant 4 · 3 implementations · 7 checks per implementation

Case contract

Read ordered file fragments [partition-values,physical-rows] under a projection of field names. Partition values override stale physical columns of the same name; unprojected fields disappear, missing fields become None, and physically empty fragments do not synthesize rows.

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
empty fragment	`[["a"]]`	`[]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.