FA-48407 / Delimited text / Member archive

A repeated physical column is admitted as a permutation · case 02

A structured table violates the declared record or column contract.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Process an initial comma header plus ORDER|comma-indexes and DATA|comma-values records. ORDER is a zero-based permutation describing each incoming position original column index. Each new order replaces the previous order. DATA is rearranged into original header order. Reject invalid permutations and row widths.

Why this case matters

Delimited interchange needs explicit framing, schema and field semantics at ingestion and emission boundaries.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
duplicate order	`[]`	`null`	Failed

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