Struct RowChange 

pub struct RowChange {
    pub row: RowId,
    pub change: Change<Value>,
    pub old: BTreeMap<String, Value>,
    pub sources: WriteSources,
    pub creator: Option<ChangeId>,
    pub execution: Execution,
}

Merge’s change to one row, together with the cells a delete replaced (§4), the original creation it copies and the SQL operations that produced it.

Fields

row: RowId

Table, encoded primary key and audience.

change: Change<Value>

The pre-change generation and merge operation, including parent metadata.

old: BTreeMap<String, Value>

A delete’s replaced cells, each with the value its setter wrote; empty for an insert or an update, which carry no replaced value (D5.5). SQL NULL is a value, not absence.

sources: WriteSources

Authenticated original generation and cell sources, independent of scalars.

creator: Option<ChangeId>

For an insert copying a row from another audience (§15.4), the copied row’s original creation, whose author keeps owning it (§9.6).

execution: Execution

The statement, shared-trigger and foreign-key operations on this row, in execution order, including a dismissal’s deletes and the halves of a move the row’s own operation made. A row a move carried along with its ancestor, and a migration difference, have no steps.

Implementations

impl RowChange

pub fn encode(&self) -> Result<Vec<u8>, Error>

Validate and encode one bounded row-change frame (kind 2).

pub fn decode(bytes: &[u8]) -> Result<Self, Error>

Decode exactly one row-change frame.

pub fn validate_past(&self, past: &impl WritePast) -> Result<(), Error>

Check source reads against the consumer’s resolved authored past.

Trait Implementations

impl Clone for RowChange

fn clone(&self) -> RowChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowChange

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

Formats the value using the given formatter.

impl PartialEq for RowChange

fn eq(&self, other: &RowChange) -> 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 RowChange

impl StructuralPartialEq for RowChange