Enum ChunkSizeHint 

pub enum ChunkSizeHint {
    Default,
    Small,
    Large,
    Exact(usize),
    AtMost(usize),
}

Hint for preferred chunk size.

Operators can provide hints to optimize chunk sizing for their workload.

Variants

Default

Use default chunk size (2048 tuples).

Small

Use small chunks (256-512 tuples) for LIMIT or high selectivity.

Large

Use large chunks (4096 tuples) for full scans.

Exact(usize)

Use exact chunk size.

AtMost(usize)

Use at most this many tuples (for LIMIT).

Trait Implementations

impl Clone for ChunkSizeHint

fn clone(&self) -> ChunkSizeHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChunkSizeHint

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

Formats the value using the given formatter.

impl Default for ChunkSizeHint

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ChunkSizeHint

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

impl Eq for ChunkSizeHint

impl StructuralPartialEq for ChunkSizeHint