SortMergeJoinStream

Struct SortMergeJoinStream 

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pub(super) struct SortMergeJoinStream {
Show 28 fields pub schema: SchemaRef, pub null_equality: NullEquality, pub sort_options: Vec<SortOptions>, pub filter: Option<JoinFilter>, pub join_type: JoinType, pub batch_size: usize, pub streamed_schema: SchemaRef, pub streamed: SendableRecordBatchStream, pub streamed_batch: StreamedBatch, pub streamed_joined: bool, pub streamed_state: StreamedState, pub on_streamed: Vec<PhysicalExprRef>, pub buffered_schema: SchemaRef, pub buffered: SendableRecordBatchStream, pub buffered_data: BufferedData, pub buffered_joined: bool, pub buffered_state: BufferedState, pub on_buffered: Vec<PhysicalExprRef>, pub state: SortMergeJoinState, pub staging_output_record_batches: JoinedRecordBatches, pub output: RecordBatch, pub output_size: usize, pub current_ordering: Ordering, pub spill_manager: SpillManager, pub join_metrics: SortMergeJoinMetrics, pub reservation: MemoryReservation, pub runtime_env: Arc<RuntimeEnv>, pub streamed_batch_counter: AtomicUsize,
}
Expand description

Sort-Merge join stream that consumes streamed and buffered data streams and produces joined output stream.

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§schema: SchemaRef

Output schema

§null_equality: NullEquality

Defines the null equality for the join.

§sort_options: Vec<SortOptions>

Sort options of join columns used to sort streamed and buffered data stream

§filter: Option<JoinFilter>

optional join filter

§join_type: JoinType

How the join is performed

§batch_size: usize

Target output batch size

§streamed_schema: SchemaRef

Input schema of streamed

§streamed: SendableRecordBatchStream

Streamed data stream

§streamed_batch: StreamedBatch

Current processing record batch of streamed

§streamed_joined: bool

(used in outer join) Is current streamed row joined at least once?

§streamed_state: StreamedState

State of streamed

§on_streamed: Vec<PhysicalExprRef>

Join key columns of streamed

§buffered_schema: SchemaRef

Input schema of buffered

§buffered: SendableRecordBatchStream

Buffered data stream

§buffered_data: BufferedData

Current buffered data

§buffered_joined: bool

(used in outer join) Is current buffered batches joined at least once?

§buffered_state: BufferedState

State of buffered

§on_buffered: Vec<PhysicalExprRef>

Join key columns of buffered

§state: SortMergeJoinState

Current state of the stream

§staging_output_record_batches: JoinedRecordBatches

Staging output array builders

§output: RecordBatch

Output buffer. Currently used by filtering as it requires double buffering to avoid small/empty batches. Non-filtered join outputs directly from staging_output_record_batches.batches

§output_size: usize

Staging output size, including output batches and staging joined results. Increased when we put rows into buffer and decreased after we actually output batches. Used to trigger output when sufficient rows are ready

§current_ordering: Ordering

The comparison result of current streamed row and buffered batches

§spill_manager: SpillManager

Manages the process of spilling and reading back intermediate data

§join_metrics: SortMergeJoinMetrics

Metrics

§reservation: MemoryReservation

Memory reservation

§runtime_env: Arc<RuntimeEnv>

Runtime env

§streamed_batch_counter: AtomicUsize

A unique number for each batch

Implementations§

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impl SortMergeJoinStream

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pub fn try_new( spill_compression: SpillCompression, schema: SchemaRef, sort_options: Vec<SortOptions>, null_equality: NullEquality, streamed: SendableRecordBatchStream, buffered: SendableRecordBatchStream, on_streamed: Vec<Arc<dyn PhysicalExpr>>, on_buffered: Vec<Arc<dyn PhysicalExpr>>, filter: Option<JoinFilter>, join_type: JoinType, batch_size: usize, join_metrics: SortMergeJoinMetrics, reservation: MemoryReservation, runtime_env: Arc<RuntimeEnv>, ) -> Result<Self>

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fn poll_streamed_row( &mut self, cx: &mut Context<'_>, ) -> Poll<Option<Result<()>>>

Poll next streamed row

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fn free_reservation(&mut self, buffered_batch: BufferedBatch) -> Result<()>

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fn allocate_reservation(&mut self, buffered_batch: BufferedBatch) -> Result<()>

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fn poll_buffered_batches( &mut self, cx: &mut Context<'_>, ) -> Poll<Option<Result<()>>>

Poll next buffered batches

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fn compare_streamed_buffered(&self) -> Result<Ordering>

Get comparison result of streamed row and buffered batches

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fn join_partial(&mut self) -> Result<()>

Produce join and fill output buffer until reaching target batch size or the join is finished

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fn freeze_all(&mut self) -> Result<()>

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fn freeze_dequeuing_buffered(&mut self) -> Result<()>

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fn freeze_buffered(&mut self, batch_count: usize) -> Result<()>

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fn produce_buffered_not_matched( &mut self, buffered_batch: &mut BufferedBatch, ) -> Result<()>

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fn freeze_streamed(&mut self) -> Result<()>

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fn output_record_batch_and_reset(&mut self) -> Result<RecordBatch>

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fn filter_joined_batch(&mut self) -> Result<RecordBatch>

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fn filter_record_batch_by_join_type( &mut self, record_batch: RecordBatch, corrected_mask: &BooleanArray, ) -> Result<RecordBatch>

Trait Implementations§

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impl RecordBatchStream for SortMergeJoinStream

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fn schema(&self) -> SchemaRef

Returns the schema of this RecordBatchStream. Read more
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impl Stream for SortMergeJoinStream

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type Item = Result<RecordBatch, DataFusionError>

Values yielded by the stream.
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fn poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more
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fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more

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impl<T> ErasedDestructor for T
where T: 'static,