Struct CarvedFragment 

pub struct CarvedFragment {
    pub page: u32,
    pub offset: usize,
    pub surviving: Vec<(usize, Value)>,
    pub missing: usize,
    pub confidence: f32,
    pub source: RecoverySource,
    pub wal: Option<WalProvenance>,
}

A Tier-2 partial recovery: a freed cell whose full row could not be reconstructed but at least one distinctive cell (TEXT ≥ 4 bytes of valid UTF-8, or REAL) survived at a structural anchor.

Deliberately NOT a CarvedRecord: it has no rowid (clobbered) and an incomplete column set, and it does not share the full-row 0-false-positive guarantee — it is a lead-generation surface with an expected non-zero false-positive rate. The type system keeps it out of the full-row output so a fragment can never be silently rendered as a recovered row (secure by design). Returned only by carve_with_fragments in the opt-in CarveTiers::fragments bucket. A fragment is “consistent with a partial deleted row” — the examiner draws the conclusion.

Fields

page: u32

1-based page the fragment was salvaged from.

offset: usize

Byte offset of the failed cell’s anchor within that page.

surviving: Vec<(usize, Value)>

(column_index, value) for each column that decoded cleanly, ascending by index — meaningful against the table’s column order.

missing: usize

Number of the row’s columns that did NOT decode.

confidence: f32

Always the flat Tier-2 fragment confidence (0.2) for now — strictly below every full-row class.

source: RecoverySource

Which class of free space the fragment was salvaged from (RecoverySource::FreeblockReconstructed for chain-pass fragments, RecoverySource::InPageFreeBlock for gap-pass fragments).

wal: Option<WalProvenance>

WAL log-sequence provenance. None in v1 (no WAL fragment pass yet).

Trait Implementations

impl Clone for CarvedFragment

fn clone(&self) -> CarvedFragment

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CarvedFragment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for CarvedFragment

fn eq(&self, other: &CarvedFragment) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CarvedFragment