Struct RirMeta 

pub struct RirMeta {
    pub schema: Schema,
    pub est_rows: (u64, u64),
    pub est_bytes: (u64, u64),
    pub skew: Option<SkewSignature>,
    pub deterministic: bool,
    pub layout_hint: LayoutHint,
}

Metadata attached to each RIR node

Fields

schema: Schema

Schema of output relation

est_rows: (u64, u64)

Estimated row count range (min, max)

est_bytes: (u64, u64)

Estimated memory bytes range (min, max)

skew: Option<SkewSignature>

Optional skew signature

deterministic: bool

Whether this node produces deterministic output

layout_hint: LayoutHint

Layout hint for physical storage

Implementations

impl RirMeta

pub fn with_schema(schema: Schema) -> Self

Create metadata with schema

pub fn with_rows(self, min: u64, max: u64) -> Self

Set estimated rows

pub fn with_layout(self, hint: LayoutHint) -> Self

Set layout hint

Trait Implementations

impl Clone for RirMeta

fn clone(&self) -> RirMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RirMeta

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

Formats the value using the given formatter.

impl Default for RirMeta

fn default() -> Self

Returns the “default value” for a type.