risingwave_batch::executor::join::lookup_join_base

Struct LookupJoinBase

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pub struct LookupJoinBase<K> {
Show 18 fields
    pub join_type: JoinType,
    pub condition: Option<BoxedExpression>,
    pub outer_side_input: BoxedExecutor,
    pub outer_side_data_types: Vec<DataType>,
    pub outer_side_key_idxs: Vec<usize>,
    pub inner_side_builder: Box<dyn LookupExecutorBuilder>,
    pub inner_side_key_types: Vec<DataType>,
    pub inner_side_key_idxs: Vec<usize>,
    pub null_safe: Vec<bool>,
    pub lookup_prefix_len: usize,
    pub chunk_builder: DataChunkBuilder,
    pub schema: Schema,
    pub output_indices: Vec<usize>,
    pub chunk_size: usize,
    pub identity: String,
    pub shutdown_rx: ShutdownToken,
    pub mem_ctx: MemoryContext,
    pub _phantom: PhantomData<K>,

}
Expand description

Lookup Join Base. Used by LocalLookupJoinExecutor and DistributedLookupJoinExecutor.

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§join_type: JoinType§condition: Option<BoxedExpression>§outer_side_input: BoxedExecutor§outer_side_data_types: Vec<DataType>§outer_side_key_idxs: Vec<usize>§inner_side_builder: Box<dyn LookupExecutorBuilder>§inner_side_key_types: Vec<DataType>§inner_side_key_idxs: Vec<usize>§null_safe: Vec<bool>§lookup_prefix_len: usize§chunk_builder: DataChunkBuilder§schema: Schema§output_indices: Vec<usize>§chunk_size: usize§identity: String§shutdown_rx: ShutdownToken§mem_ctx: MemoryContext§_phantom: PhantomData<K>

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impl<K: HashKey> LookupJoinBase<K>

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pub fn do_execute( self: Box<Self>, ) -> Pin<Box<dyn Stream<Item = Result<DataChunk, BatchError>> + Send>>

High level Execution flow: Repeat 1-3:

  1. Read N rows from outer side input and send keys to inner side builder after deduplication.
  2. Inner side input lookups inner side table with keys and builds hash map.
  3. Outer side rows join each inner side rows by probing the hash map.

Auto Trait Implementations§

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impl<K> Freeze for LookupJoinBase<K>

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impl<K> !RefUnwindSafe for LookupJoinBase<K>

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impl<K> Send for LookupJoinBase<K>
where K: Send,

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impl<K> !Sync for LookupJoinBase<K>

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impl<K> Unpin for LookupJoinBase<K>
where K: Unpin,

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impl<K> !UnwindSafe for LookupJoinBase<K>

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