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WindowPreGroupedState

radixdb_executor::window

Struct WindowPreGroupedState 

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pub struct WindowPreGroupedState {
    pub partition_map: FxHashMap<SmallVec<[Value; 4]>, Vec<usize>>,
    pub partition_column: String,
}
Expand description

Pre-grouped state for window function PARTITION BY optimization When rows are fetched grouped by an indexed partition column, we can skip hash-based grouping

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§partition_map: FxHashMap<SmallVec<[Value; 4]>, Vec<usize>>

Pre-built partition map: partition key -> row indices

§partition_column: String

The column name (lowercase) that the partition map was built from

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impl Clone for WindowPreGroupedState

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fn clone(&self) -> WindowPreGroupedState

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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