Enum OptimizationRule 

pub enum OptimizationRule {
    PushFilterDown,
    EliminateDeadProject,
    ReorderJoin,
    FoldConstantLimit,
    FlattenNestedFilter,
}

Rewriting rule that can be applied by TensorQueryOptimizer.

Variants

PushFilterDown

Move a Filter node below a Join node so it is applied earlier.

EliminateDeadProject

Remove a Project node whose field list is empty.

ReorderJoin

Swap Join children so the cheaper (smaller) side is on the left.

FoldConstantLimit

Replace a Limit { max_rows: 0, .. } with an empty scan.

FlattenNestedFilter

Merge two consecutive Filter nodes into one with " AND ".

Trait Implementations

impl Clone for OptimizationRule

fn clone(&self) -> OptimizationRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OptimizationRule

impl Debug for OptimizationRule

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

Formats the value using the given formatter.

impl Eq for OptimizationRule

impl PartialEq for OptimizationRule

fn eq(&self, other: &OptimizationRule) -> 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 StructuralPartialEq for OptimizationRule