Enum ChangeEvent 

pub enum ChangeEvent {
    Add(CaughtNode),
    Remove(CaughtNode),
    Edit {
        old: OwnedRow,
        row: OwnedRow,
    },
    Child {
        row: OwnedRow,
        rel: RelId,
        change: Box<CaughtChange>,
    },
}

An owned, fully-materialized change event off the pipeline — the raw delta the engine emits (re-exported from the engine, where it is CaughtChange). Nested relationships are carried in NodeData::relationships. A caught downstream change. Mirrors catch.ts expandChange output: an Edit carries only the two rows (no node, catch.ts:104-109); a Child carries the parent row, the relationship slot, and the nested change (catch.ts:110-118).

Variants

Add(CaughtNode)

Remove(CaughtNode)

Edit

Fields

old: OwnedRow

row: OwnedRow

Child

Fields

row: OwnedRow

rel: RelId

change: Box<CaughtChange>

Implementations

impl CaughtChange

pub fn root_row(&self) -> &OwnedRow

The root row this change is routed by: the node’s row for Add/Remove, the new row for Edit (a partition-key change never reaches a consumer as an Edit — the source splits it — so old agrees on every routing column), and the parent row for Child (the outermost Child of a nested change carries the top-level row). This is what a parameterized query family’s consumer demuxes partitions by (design 310 §4.2 / impl plan D8): every change is routable by a column read of this row.

Trait Implementations

impl Clone for CaughtChange

fn clone(&self) -> CaughtChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CaughtChange

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

Formats the value using the given formatter.

impl PartialEq for CaughtChange

fn eq(&self, o: &CaughtChange) -> 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 Eq for CaughtChange