risingwave_stream::executor::hash_join

Struct JoinSide

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struct JoinSide<K: HashKey, S: StateStore> {
    ht: JoinHashMap<K, S>,
    join_key_indices: Vec<usize>,
    all_data_types: Vec<DataType>,
    start_pos: usize,
    i2o_mapping: Vec<(usize, usize)>,
    i2o_mapping_indexed: MultiMap<usize, usize>,
    input2inequality_index: Vec<Vec<(usize, bool)>>,
    non_null_fields: Vec<usize>,
    state_clean_columns: Vec<(usize, usize)>,
    need_degree_table: bool,
}

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§ht: JoinHashMap<K, S>

Store all data from a one side stream

§join_key_indices: Vec<usize>

Indices of the join key columns

§all_data_types: Vec<DataType>

The data type of all columns without degree.

§start_pos: usize

The start position for the side in output new columns

§i2o_mapping: Vec<(usize, usize)>

The mapping from input indices of a side to output columes.

§i2o_mapping_indexed: MultiMap<usize, usize>§input2inequality_index: Vec<Vec<(usize, bool)>>

The first field of the ith element indicates that when a watermark at the ith column of this side comes, what band join conditions should be updated in order to possibly generate a new watermark at that column or the corresponding column in the counterpart join side.

The second field indicates that whether the column is required less than the the corresponding column in the counterpart join side in the band join condition.

§non_null_fields: Vec<usize>

Some fields which are required non null to match due to inequalities.

§state_clean_columns: Vec<(usize, usize)>

(i, j) in this Vec means that state data in this join side can be cleaned if the value of its ith column is less than the synthetic watermark of the jth band join condition.

§need_degree_table: bool

Whether degree table is needed for this side.

Implementations§

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impl<K: HashKey, S: StateStore> JoinSide<K, S>

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fn is_dirty(&self) -> bool

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fn clear_cache(&mut self)

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pub async fn init(&mut self, epoch: EpochPair) -> StreamExecutorResult<()>

Trait Implementations§

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impl<K: HashKey, S: StateStore> Debug for JoinSide<K, S>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<K, S> !Freeze for JoinSide<K, S>

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impl<K, S> !RefUnwindSafe for JoinSide<K, S>

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impl<K, S> Send for JoinSide<K, S>

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impl<K, S> Sync for JoinSide<K, S>

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impl<K, S> Unpin for JoinSide<K, S>
where <K as HashKey>::Bitmap: Unpin, <S as StateStore>::Local: Unpin, S: Unpin,

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impl<K, S> !UnwindSafe for JoinSide<K, S>

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