Struct ShapeObservation 

pub struct ShapeObservation {
    pub generation: u64,
    pub self_healed: bool,
    pub first_seen: bool,
}

Outcome of observing a freshly-described shape for a SQL statement.

Fields

generation: u64

Per-key generation counter. Starts at 1 on first sight and increments by exactly one on every self-heal; it is monotonic and never decreases, so a caller can use it as a version stamp for a cached decode plan.

self_healed: bool

True when the observed shape differed from the cached one, so the cache invalidated the stale record and adopted the fresh shape. Self-heal only ever heals down (invalidate + re-record); it never loosens.

first_seen: bool

True only for the very first observation of this key (no prior shape).

Implementations

impl ShapeObservation

pub fn requires_rebind(&self) -> bool

Whether the caller must re-describe / drop any retained decode plan for this SQL before decoding (true exactly when a cross-connection shape change was just healed).

Trait Implementations

impl Clone for ShapeObservation

fn clone(&self) -> ShapeObservation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ShapeObservation

impl Debug for ShapeObservation

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

Formats the value using the given formatter.

impl Eq for ShapeObservation

impl PartialEq for ShapeObservation

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ShapeObservation