risingwave_stream::from_proto::group_top_n

Struct GroupTopNExecutorDispatcherArgs

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struct GroupTopNExecutorDispatcherArgs<S: StateStore> {
    input: Executor,
    ctx: ActorContextRef,
    schema: Schema,
    storage_key: Vec<ColumnOrder>,
    offset_and_limit: (usize, usize),
    order_by: Vec<ColumnOrder>,
    group_by: Vec<usize>,
    state_table: StateTable<S>,
    watermark_epoch: AtomicU64Ref,
    group_key_types: Vec<DataType>,
    with_ties: bool,
    append_only: bool,
}

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§input: Executor§ctx: ActorContextRef§schema: Schema§storage_key: Vec<ColumnOrder>§offset_and_limit: (usize, usize)§order_by: Vec<ColumnOrder>§group_by: Vec<usize>§state_table: StateTable<S>§watermark_epoch: AtomicU64Ref§group_key_types: Vec<DataType>§with_ties: bool§append_only: bool

Trait Implementations§

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impl<S: StateStore> HashKeyDispatcher for GroupTopNExecutorDispatcherArgs<S>

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type Output = Result<Box<dyn Execute>, StreamError>

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fn dispatch_impl<K: HashKey>(self) -> Self::Output

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fn data_types(&self) -> &[DataType]

The data types used to build the hash key.
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fn dispatch(self) -> Self::Output

Based on the number of group keys and total size of group keys, we decide: Read more
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fn dispatch_by_key_size<T>(self) -> Self::Output
where T: NullBitmap,

All data types will be stored in a single HashKey. We use Key<N> for fixed size keys, KeySerialized for variable length keys.

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