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PerGroupTopKConfig

laminar_sql::translator::order_translator

Struct PerGroupTopKConfig 

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pub struct PerGroupTopKConfig {
    pub k: usize,
    pub partition_columns: Vec<String>,
    pub sort_columns: Vec<OrderColumn>,
    pub max_partitions: usize,
    pub rank_type: RankType,
}
Expand description

Configuration for per-group (partitioned) top-K operator.

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§k: usize

Number of top entries per partition

§partition_columns: Vec<String>

Partition key columns

§sort_columns: Vec<OrderColumn>

Sort columns and directions

§max_partitions: usize

Maximum number of partitions (memory safety)

§rank_type: RankType

Which ranking function was used (ROW_NUMBER, RANK, or DENSE_RANK)

Implementations§

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impl PerGroupTopKConfig

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pub fn with_max_partitions(self, max_partitions: usize) -> Self

Sets the maximum number of partitions.

Trait Implementations§

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impl Clone for PerGroupTopKConfig

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fn clone(&self) -> PerGroupTopKConfig

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PerGroupTopKConfig

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

Formats the value using the given formatter. Read more
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impl PartialEq for PerGroupTopKConfig

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fn eq(&self, other: &PerGroupTopKConfig) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for PerGroupTopKConfig

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impl StructuralPartialEq for PerGroupTopKConfig

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