Struct RowDamageVector 

pub struct RowDamageVector {
    pub changed: Vec<(String, Value, Value)>,
    pub added: Vec<(String, Value)>,
    pub removed: Vec<(String, Value)>,
}

Damage-vector for a row update: the minimal diff between the pre-mutation and post-mutation field state. Downstream consumers (secondary-index maintainer, CDC emitter, eventually the pager’s in-place update path) work off this struct so they only touch columns that actually changed.

Future work (Fase 5): the pager can decide whether changed fits in the existing cell’s slotted footprint and patch bytes in place instead of rewriting the whole row.

Fields

changed: Vec<(String, Value, Value)>

Columns present in both old and new whose value differs. (column, old_value, new_value).

added: Vec<(String, Value)>

Columns present in new but not in old.

removed: Vec<(String, Value)>

Columns present in old but not in new.

Implementations

impl RowDamageVector

pub fn is_empty(&self) -> bool

True when no columns changed, were added, or were removed. Callers can short-circuit index/CDC/in-place work when this holds.

pub fn touched_columns(&self) -> Vec<&str>

Names of every column the update touched. Equivalent to the current modified_columns list carried on AppliedEntityMutation but computed from the ground truth of old/new rather than from what the SQL executor thinks it wrote.

Trait Implementations

impl Clone for RowDamageVector

fn clone(&self) -> RowDamageVector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowDamageVector

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

Formats the value using the given formatter.

impl Default for RowDamageVector

fn default() -> RowDamageVector

Returns the “default value” for a type.

impl PartialEq for RowDamageVector

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for RowDamageVector