Struct datafusion::physical_optimizer::coalesce_batches::CoalesceBatches

pub struct CoalesceBatches {}

Optimizer rule that introduces CoalesceBatchesExec to avoid overhead with small batches that are produced by highly selective filters

Implementations

impl CoalesceBatches

pub fn new() -> Self

Trait Implementations

impl Default for CoalesceBatches

fn default() -> CoalesceBatches

Returns the “default value” for a type.

impl PhysicalOptimizerRule for CoalesceBatches

fn optimize( &self, plan: Arc<dyn ExecutionPlan>, config: &ConfigOptions ) -> Result<Arc<dyn ExecutionPlan>>

Rewrite plan to an optimized form

fn name(&self) -> &str

A human readable name for this optimizer rule

fn schema_check(&self) -> bool

A flag to indicate whether the physical planner should valid the rule will not change the schema of the plan after the rewriting. Some of the optimization rules might change the nullable properties of the schema and should disable the schema check.