Struct Stripes 

pub struct Stripes { /* private fields */ }

The bounds of a committed native table, as the planner asks for them.

Holds the reader rather than a copy of the bounds. A reader is a handful of reference counts and cloning one shares the caches it has already filled, where copying the bounds out would be every stripe of every column of the table per statement bound.

Implementations

impl Stripes

pub fn new(reader: Reader) -> Self

The bounds of a table somebody has open.

Trait Implementations

impl Clone for Stripes

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Stripes

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

Formats the value using the given formatter.

impl Zones for Stripes

fn column(&self, name: &str) -> Option<usize>

Which column of this store’s own numbering the column called name is.

fn surviving(&self, tests: &[Test]) -> Option<u64>

How many rows are in the parts that tests cannot rule out.

fn spread(&self, tests: &[Test]) -> Option<Spread>

What fraction of the store’s rows tests is expected to keep, and how many of them said so.

fn nulls(&self, column: usize) -> Stat<u64>

How many rows of that column are null, across the whole store.

fn extreme(&self, column: usize, end: End) -> Stat<Bound>

The smallest or the largest value that column holds anywhere in the store.