Struct datafusion::physical_plan::joins::CrossJoinExec

pub struct CrossJoinExec {
    pub left: Arc<dyn ExecutionPlan>,
    pub right: Arc<dyn ExecutionPlan>,
    /* private fields */
}

executes partitions in parallel and combines them into a set of partitions by combining all values from the left with all values on the right

Fields

left: Arc<dyn ExecutionPlan>

left (build) side which gets loaded in memory

right: Arc<dyn ExecutionPlan>

right (probe) side which are combined with left side

Implementations

impl CrossJoinExec

pub fn new( left: Arc<dyn ExecutionPlan>, right: Arc<dyn ExecutionPlan> ) -> CrossJoinExec

Create a new CrossJoinExec.

pub fn left(&self) -> &Arc<dyn ExecutionPlan>

left (build) side which gets loaded in memory

pub fn right(&self) -> &Arc<dyn ExecutionPlan>

right side which gets combined with left side

Trait Implementations

impl Debug for CrossJoinExec

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

Formats the value using the given formatter.

impl DisplayAs for CrossJoinExec

fn fmt_as( &self, t: DisplayFormatType, f: &mut Formatter<'_> ) -> Result<(), Error>

Format according to DisplayFormatType, used when verbose representation looks different from the default one

impl ExecutionPlan for CrossJoinExec

fn unbounded_output(&self, children: &[bool]) -> Result<bool, DataFusionError>

Specifies whether this plan generates an infinite stream of records. If the plan does not support pipelining, but its input(s) are infinite, returns an error to indicate this.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the execution plan as Any so that it can be downcast to a specific implementation.

fn schema(&self) -> Arc<Schema>

Get the schema for this execution plan

fn children(&self) -> Vec<Arc<dyn ExecutionPlan>>

Get a list of child execution plans that provide the input for this plan. The returned list will be empty for leaf nodes, will contain a single value for unary nodes, or two values for binary nodes (such as joins).

fn metrics(&self) -> Option<MetricsSet>

Return a snapshot of the set of Metrics for this ExecutionPlan.

fn with_new_children( self: Arc<CrossJoinExec>, children: Vec<Arc<dyn ExecutionPlan>> ) -> Result<Arc<dyn ExecutionPlan>, DataFusionError>

Returns a new plan where all children were replaced by new plans.

fn required_input_distribution(&self) -> Vec<Distribution>

Specifies the data distribution requirements for all the children for this operator, By default it’s [Distribution::UnspecifiedDistribution] for each child,

fn output_partitioning(&self) -> Partitioning

Specifies the output partitioning scheme of this plan

fn output_ordering(&self) -> Option<&[PhysicalSortExpr]>

If the output of this operator within each partition is sorted, returns Some(keys) with the description of how it was sorted.

fn equivalence_properties(&self) -> EquivalenceProperties

Get the EquivalenceProperties within the plan

fn execute( &self, partition: usize, context: Arc<TaskContext> ) -> Result<Pin<Box<dyn RecordBatchStream<Item = Result<RecordBatch, DataFusionError>> + Send>>, DataFusionError>

creates an iterator

fn statistics(&self) -> Statistics

Returns the global output statistics for this ExecutionPlan node.

fn required_input_ordering(&self) -> Vec<Option<Vec<PhysicalSortRequirement>>>

Specifies the ordering requirements for all of the children For each child, it’s the local ordering requirement within each partition rather than the global ordering

fn maintains_input_order(&self) -> Vec<bool>

Returns false if this operator’s implementation may reorder rows within or between partitions.

fn benefits_from_input_partitioning(&self) -> Vec<bool>

Specifies whether the operator benefits from increased parallelization at its input for each child. If set to true, this indicates that the operator would benefit from partitioning its corresponding child (and thus from more parallelism). For operators that do very little work the overhead of extra parallelism may outweigh any benefits

fn ordering_equivalence_properties(&self) -> OrderingEquivalenceProperties

Get the OrderingEquivalenceProperties within the plan