Enum ExecutionMode 

pub enum ExecutionMode {
    PrepareNone,
    PrepareBuild,
    PrepareProbe,
    Speculative(usize),
}

Execution mode for spatial join operations, controlling prepared geometry usage.

Prepared geometries are pre-processed spatial objects that can significantly improve performance for spatial predicate evaluation when the same geometry is used multiple times in comparisons.

The choice of execution mode depends on the specific characteristics of your spatial join workload, as well as the spatial relation predicate between the two tables. Some of the spatial relation computations cannot be accelerated by prepared geometries at all (for example, ST_Touches, ST_Crosses, ST_DWithin).

Variants

PrepareNone

Don’t use prepared geometries for spatial predicate evaluation.

PrepareBuild

Create prepared geometries for the build side (left/smaller table).

PrepareProbe

Create prepared geometries for the probe side (right/larger table).

Speculative(usize)

Automatically choose the best execution mode based on the characteristics of first few geometries on the probe side.

Implementations

impl ExecutionMode

pub fn to_usize(&self) -> usize

Convert the execution mode to a usize value.

This is used to show the execution mode in the metrics. We use a gauge value to represent the execution mode.

Trait Implementations

impl Clone for ExecutionMode

fn clone(&self) -> ExecutionMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ConfigField for ExecutionMode

fn visit<V>(&self, v: &mut V, key: &str, description: &'static str)

where V: Visit,

fn set(&mut self, _key: &str, value: &str) -> Result<(), DataFusionError>

impl Debug for ExecutionMode

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

Formats the value using the given formatter.

impl PartialEq for ExecutionMode

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

impl StructuralPartialEq for ExecutionMode