FA-45082 / Data systems / Member archive

Constant vector removes repeated gathered rows · case 02

Constant vector removes repeated gathered rows.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Materialize a constant vector over a requested logical length, combining scalar validity with row validity. A selection chooses logical rows and may repeat them. Return [row-index,value-or-null] for every selected row; scalar zero is a valid value.

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
repeat row	`[[1, 2]]`	`[[1, 2], [1, 2]]`	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.