Struct LinearStagePlan 

pub struct LinearStagePlan {
    pub lookup_relation: usize,
    pub stream_key: Vec<ScalarExpr>,
    pub stream_thinning: Vec<usize>,
    pub lookup_key: Vec<ScalarExpr>,
    pub closure: JoinFilter,
}

A plan for the execution of one stage of a linear join.

Each stage is a binary join between the current accumulated join results, and a new collection. The former is referred to as the “stream” and the latter the “lookup”.

Fields

lookup_relation: usize

The index of the relation into which we will look up.

stream_key: Vec<ScalarExpr>

The key expressions to use for the stream relation.

stream_thinning: Vec<usize>

Columns to retain from the stream relation. These columns are those that are not redundant with stream_key, and cannot be read out of the key component of an arrangement.

lookup_key: Vec<ScalarExpr>

The key expressions to use for the lookup relation.

closure: JoinFilter

The closure to apply to the concatenation of the key columns, the stream value columns, and the lookup value columns.

Trait Implementations

impl Clone for LinearStagePlan

fn clone(&self) -> LinearStagePlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LinearStagePlan

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

Formats the value using the given formatter.

impl Ord for LinearStagePlan

fn cmp(&self, other: &LinearStagePlan) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for LinearStagePlan

fn eq(&self, other: &LinearStagePlan) -> 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 PartialOrd for LinearStagePlan

fn partial_cmp(&self, other: &LinearStagePlan) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for LinearStagePlan

impl StructuralPartialEq for LinearStagePlan