Struct Step 

pub struct Step {
    pub sequence: u32,
    pub change: Change<Value>,
    pub half: Half,
}

One row operation at its place in the write’s execution (§9.6, D5). Statements, shared triggers, foreign-key actions and dismissal deletes record steps; no step says which of them produced it.

Fields

sequence: u32

The operation’s position in the write. Only the steps of one operation on several rows share a position: the halves of a primary-key update, or of the moves to another audience of a row and of the rows that follow its audience.

change: Change<Value>

The row’s generation before the operation, and the columns it set, with the parents its references named at that moment.

half: Half

Which half of an operation on two rows the step is, if either.

Implementations

impl Step

pub fn after<'a>(steps: impl IntoIterator<Item = &'a Step>) -> u32

The position after every one of steps, where an operation the write adds after them goes: 0 with none.

Trait Implementations

impl Clone for Step

fn clone(&self) -> Step

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Step

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

Formats the value using the given formatter.

impl PartialEq for Step

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

impl StructuralPartialEq for Step