Enum RowSelectionPolicy 

pub enum RowSelectionPolicy {
    Selectors,
    Mask,
    Auto {
        threshold: usize,
    },
}

Policy for picking a strategy to materialise RowSelection during execution.

Note that this is a user-provided preference, and the actual strategy used may differ based on safety considerations (e.g. page skipping).

Variants

Selectors

Use a queue of RowSelector values

Mask

Use a boolean mask to materialise the selection

Auto

Choose between Self::Mask and Self::Selectors based on selector density

Fields

threshold: usize

Average selector length below which masks are preferred

Trait Implementations

impl Clone for RowSelectionPolicy

fn clone(&self) -> RowSelectionPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowSelectionPolicy

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

Formats the value using the given formatter.

impl Default for RowSelectionPolicy

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for RowSelectionPolicy

fn eq(&self, other: &RowSelectionPolicy) -> 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 Copy for RowSelectionPolicy

impl Eq for RowSelectionPolicy

impl StructuralPartialEq for RowSelectionPolicy