Struct datafusion::physical_plan::union::InterleaveExec
source · pub struct InterleaveExec { /* private fields */ }
Expand description
Combines multiple input streams by interleaving them.
This only works if all inputs have the same hash-partitioning.
Data Flow
+---------+
| |---+
| Input 1 | |
| |-------------+
+---------+ | |
| | +---------+
+------------------>| |
+---------------->| Combine |-->
| +-------------->| |
| | | +---------+
+---------+ | | |
| |-----+ | |
| Input 2 | | |
| |---------------+
+---------+ | | |
| | | +---------+
| +-------->| |
| +------>| Combine |-->
| +---->| |
| | +---------+
+---------+ | |
| |-------+ |
| Input 3 | |
| |-----------------+
+---------+
Implementations§
Trait Implementations§
source§impl Debug for InterleaveExec
impl Debug for InterleaveExec
source§impl ExecutionPlan for InterleaveExec
impl ExecutionPlan for InterleaveExec
source§fn unbounded_output(&self, children: &[bool]) -> Result<bool>
fn unbounded_output(&self, children: &[bool]) -> Result<bool>
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.
source§fn output_partitioning(&self) -> Partitioning
fn output_partitioning(&self) -> Partitioning
All inputs must have the same partitioning. The output partioning of InterleaveExec is the same as the inputs
(NOT combined). E.g. if there are 10 inputs where each is Hash(3)
-partitioned, InterleaveExec is also
Hash(3)
-partitioned.
source§fn children(&self) -> Vec<Arc<dyn ExecutionPlan>>
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).
source§fn output_ordering(&self) -> Option<&[PhysicalSortExpr]>
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. Read moresource§fn maintains_input_order(&self) -> Vec<bool>
fn maintains_input_order(&self) -> Vec<bool>
Returns
false
if this operator’s implementation may reorder
rows within or between partitions. Read moresource§fn with_new_children(
self: Arc<Self>,
children: Vec<Arc<dyn ExecutionPlan>>
) -> Result<Arc<dyn ExecutionPlan>>
fn with_new_children( self: Arc<Self>, children: Vec<Arc<dyn ExecutionPlan>> ) -> Result<Arc<dyn ExecutionPlan>>
Returns a new plan where all children were replaced by new plans.
source§fn execute(
&self,
partition: usize,
context: Arc<TaskContext>
) -> Result<SendableRecordBatchStream>
fn execute( &self, partition: usize, context: Arc<TaskContext> ) -> Result<SendableRecordBatchStream>
creates an iterator
source§fn metrics(&self) -> Option<MetricsSet>
fn metrics(&self) -> Option<MetricsSet>
source§fn statistics(&self) -> Statistics
fn statistics(&self) -> Statistics
Returns the global output statistics for this
ExecutionPlan
node.source§fn benefits_from_input_partitioning(&self) -> bool
fn benefits_from_input_partitioning(&self) -> bool
Returns
true
if this operator would benefit from
partitioning its input (and thus from more parallelism). For
operators that do very little work the overhead of extra
parallelism may outweigh any benefits Read moresource§fn required_input_distribution(&self) -> Vec<Distribution>
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,
source§fn required_input_ordering(&self) -> Vec<Option<Vec<PhysicalSortRequirement>>>
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 Read more
source§fn equivalence_properties(&self) -> EquivalenceProperties
fn equivalence_properties(&self) -> EquivalenceProperties
Get the EquivalenceProperties within the plan
source§fn ordering_equivalence_properties(&self) -> OrderingEquivalenceProperties
fn ordering_equivalence_properties(&self) -> OrderingEquivalenceProperties
Get the OrderingEquivalenceProperties within the plan
Auto Trait Implementations§
impl !RefUnwindSafe for InterleaveExec
impl Send for InterleaveExec
impl Sync for InterleaveExec
impl Unpin for InterleaveExec
impl !UnwindSafe for InterleaveExec
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more