Enum Tier 

pub enum Tier {
    T1PostgresCatalog,
    T2IcebergFieldIds,
    T3TblProperties,
    T4InclusionDependency,
}

Resolution tier — where a node/edge mapping’s authority came from, per the rel2graph spec. Recorded on every plan element and surfaced in the WARNINGS provenance block so a reviewer can see how confident each mapping is (T1 catalog fact ▸ T4 inference proposal).

Variants

T1PostgresCatalog

T1 — the upstream Postgres catalog (PK/FK constraints). The answer for most schemas: Iceberg is the data plane, Postgres the schema plane.

T2IcebergFieldIds

T2 — Iceberg identifier-field-ids (the table’s declared identity).

T3TblProperties

T3 — knut.* TBLPROPERTIES on the table (knut.node.label/knut.node.key/knut.edge.*). What a hand-authored or reviewed MappingSpec encodes.

T4InclusionDependency

T4 — inclusion-dependency inference (the LEFT-ANTI-JOIN orphan test). Proposals only — emitted COMMENTED-OUT with evidence, never applied. A T4 element must never appear in the active plan.

Implementations

impl Tier

pub fn token(self) -> &'static str

A stable short token (T1…T4).

pub fn describe(self) -> &'static str

A one-line human description of the tier.

Trait Implementations

impl Clone for Tier

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tier

impl Debug for Tier

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

Formats the value using the given formatter.

impl Eq for Tier

impl Ord for Tier

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Tier

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Tier

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Tier